McGRAW-HILL PUBLISHING COMPANY, INC.10th AVE. AT 36th ST.

NEW YORK

VOLUME XXXII

July 1 to December 31, 1927

With Which is Consolidated “ The Colliery Engineer” and “ Mines and M inerals”

DEVOTED TO THE OPERATING, TECHNICAL BUSINESS PROBLEMS OF THE COAL-MINING INDUSTRY

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I

COAL AGEW ith Which is Consolidated

The "C olliery E ngineer" and "M ines and M inerals"

INDEX TO VOLUME XXXIIJuly 1 to December 31, 1927

NOTE]— T h e a r t i c le s a n d r e fe re n c e s in th is in d e x h a v e b e en c la s s if ie d u n d e r le a d ­ing: s u b je c ts o r to p ic s , a s f a r a s p ra c t ic a b le , a n d s h o u ld be s o u g h t u n d e r s u c h h e a d s , w h ic h to g e th e r w ith a l l u n c la s s if ie d m a t t e r a r e a r r a n g e d a lp h a b e t ic a l ly . I l l u s t r a t e d a r t ic le s o r c u ts s t a n d in g b y th e m s e lv e s a r e In d ic a te d b y a n a s te r i s k (* ) . A ll e d i to r ia ls a p p e a r u n d e r t h a t s u b je c t , e a c h h a v in g i ts e x a c t t i t le . E ls e w h e r e th e s u b je c t m a t t e r o f a n e d i to r ia l w ill be fo u n d c la ss if ie d a n d m a rk e d ( e ) . M a n y t i t le s o f a r t i c le s a r e a b b re v ia te d , th e a im b e in g to g iv e p ro m i­n e n c e to im p o r ta n t w o rd s . B o o k re v ie w s a r e in d ic a te d b y ( t ) .

F o l lo w in g is a l i s t o f th e p a g e s in c lu d e d in e a c h is su e o f th e v o lu m e , to g e th e r w ith d a te a n d n u m b e r o f th e is su e , f o r c o n ­v e n ie n c e o r r e f e r e n c e :

N o. P p .J u ly 1 1- 62A u g . 2 63-118S e p t. 3 119-178O ct. 4 179-238N o v . 5 239-30SD ec. 6 309-368

A

PageA c ld p ro o f p u m p p a r t s .................................. *305

A c c id e n ts . See a ls o F a ta l i t i e s— C a n th e y be p re v e n te d ? C a m e ro n . . 142— D e c re a s e in W . V a ........................................ 317— G r e a t B r i ta in ................................................ 329A g o m a C o a l & C o k e Co.— D ry c le a n in g ................................................... 351A m b u la n c e , M in e c a r c o n v e r te d in to . .* 1 1 0 A m e r ic a n R o ll in g M ill Co.— M o to r b a r n ...................................................... *359A n im a ls in s o f t c o a l m in e s in 1924 . . . *85

A n th r a c i te— A w a k e , A n th r a c i te . W a r r in e r ........... 76— C h a r t s a n e w c o u rs e . B u c h a n a n . . 9— C ru s h in g ro ll te n d e n c ie s . D u c k . . . * 1 4 6— E ffe c ts o f s t r ik e ......................................... 297— Is a n th r a c i t e fu lly a w a k e ( e ) ............. 215— M t. C a rm e l c o n v e n t io n — P r o g ra m ,

301 ; M e e tin g .............................................. 354— P ro d u c t io n . S ee “P r o d u c t io n ’'— R e s e a r c h ( e ) ................................................... 288— S h ip m e n ts ........................................................ 225— T u r n s to a u to m a t ic c o n tro l. J e n ­

n in g s .................................................................*129

A r m a tu r e b in d in g w ire , T e n s io n on . . .*171 A r m a tu r e t ro u b le d u e to c a r e le s s n e s s 171 A s s o c ia te d C o m p a n ie s , T h e — W h y th e y le f t c o a l field . A rn o ld . . . 143

A s s o c ia tio n s a n d I n s t i t u t e s — A m e r. I n s t . M in . & M e ta ll . E n g r s .—

G. O. S m ith n o m in a te d ..................... 296— A m e r ic a n M in in g C o n g re s s — D e fe rs

p la n s f o r 1928, 1 6 1 ; P r o g r a ma n n u a l m e e t in g ............................. 301, 350

— B r i t i s h E m p ire M in in g a n d M e ta l­lu rg ic a l C o n g re s s .................................... 162

— E n g in e e r s ’ S o c ie ty N o r th e a s t e r n P a . ,m e e tin g , 223, 294 ; P a p e r s ................ 315

— E n g in e e r s ’ S o c ie ty W e s te r n P a .—M ee tin g , 2 9 7 ; P a p e r s ........................... *325

— H a r la n C o u n ty C o a l O p e ra to r s —A n n u a l m e e tin g .............................. 350

— Ill in o is M in in g In s t .— S u m m e r m e e t­in g , 23 ; A n n u a l m e e t i n g ..................... 351

— I n s u r a n c e C o m m is s io n e rs , N a t l , c o n ­v e n t io n .............................. 2 2 0

— K a n a w h a C o al O p e r a to r s ’ A ss n .,a n n u a l m e e t in g ......................................... 301

— M t. C a rm e l m e e tin g — P r o g r a m , 3 0 1 ;M e e tin g ......................................................... 354

— N a tl . A ssn . P u r c h a s in g A g e n ts — C o als to c k s .......................................... 107

— N a t io n a l C o a l A ss n .— L o o k in g f o r ­w a rd . M a h a n ........................................... 6

— N a tio n a l F u e ls C o n fe re n c e ........... 221, 299— N a t io n a l S a fe ty C o u n c il M e e tin g a n d

p a p e r s ............................................................. 2 0 o— O p e r a to r s ’ A ssn . o f W ill ia m s o n F ie ld ,

a n n u a l m e e t in g ...................................... 300—-R o c k v M o u n ta in C o a l M in in g I n s t .

M e e tin g .......................................................... 158

PageA s s o c ia tio n s a n d I n s t i tu te s — C o n t’d — S eco n d E m p ire . M in in g a n d M e ta l­

lu rg ic a l C o n g re ss j ......................... 208— S o u th e rn A p p a la c h ia n C oal O p e ra ­

to r s — M e e tin g ........................................... 355A^ugers,, W e ld in g co a l .....................................*114

B

B a d g e s fo r e x p e r ts in f i r s t - a id w o rk . .* 2 2 9B a g s o f s p e c ia l fa b r ic , p o w d e r .................. 235B a l la s t f o r ro a d b e d s , U se o f “ r a s h ”

(e ) .................................................................... 96B a n k e r lo o k s a t c o a l m in in g . S i s s o n . , 7 B a r n t r a c k l a y o u t f o r in d iv id u a l s ta l ls ,

M o to r ..............................................................*359B a r n , u n d e rg ro u n d lo co m o tiv e .................*114B a th s , E le c t r ic a l h e a t in g a p p lie d to . . 358B e a r in g lu b r ic a t io n ......................... *306, *368B e a r in g s c a r r y h e a v y lo a d s , L a r g e s t

r o l l e r ................................................................ *237B e a r in g s im p ro v e c o n v e y o r ro lls , A n t i ­

f r ic t io n ........................................................... *174B ell & Z o lle r C oal & M in in g Co.— P a y r o l l a n a ly s is . W e i r ....................... 37— R e m o te h o is t c o n tro l s p e e d s c a g i n g . . *170— D o c k in g ta b le c o s ts l i t t l e ......................*172— T a p e re d c o lu m n p ie rs a lw a y s n e a t . . *172 — D is p a tc h in g a t Z e ig ie r N o . 1. K n e e -

la n d ....................................................... . .* 1 9 6— C o u n te r k e e p s h o is t t a l l y ......................*229B e l t d r iv e , T e x ro p e ...................................... 178B e lt , r i g h t p u lle y fo r r u b b e r .................. *56B e ltin g , w o rn , s to re d fo r f u tu r e u s e . . 276 B e r w in d -W h ite C o a l M g. Co.— H a u la g e . E n z la n ..................................... *91B e th le h e m M in es C o rp .— R e s c u e p la n s a n d p re c a u t io n s ............*198

B itu m in o u s— C a n in d u s t r y a v o id f e d e ra l r e g u la -

la t io n ? J o n e s .................................. 189— P ro d u c t io n . See “ P r o d u c t io n .”— S ta b i l iz in g in d u s try . J o n e s ................ 24— S to c k s .........................................................161, 353B la c k s m ith fo rg e ...............................................*306

B la s t in g . See a ls o “ E x p lo s iv e s ”— C o n tro lle d b la s t in g in s u re s c o a l

q u a l i ty . W a g n e r .................................... 315— P i t t s b u r g h C o a l Co. m i n e s ......................*256— P r e m a tu r e s h o tf ir in g a v e r te d b y n ew

c o n tro l s y s te m ..........................................*230

B o ile rs , P ic k in g ta b le r e fu s e u s e du n d e r ............................................................... 313

B o n d in g o f d .c. d is t r ib u t io n s y s te m ,L a c k o f .........................................................*360

B o o k R e v ie w — H is to ry o f e x p lo s iv e in ­d u s t r y in A m e ric a ................................. 173

B o re h o le s u s p e n s io n 2 2 0 -v o lt lin e . . . . *52 B o re h o le s c a s e d b y u n iq u e m e th o d ,

D eep ............................................................... 361

B o sse s T a lk I t O ver — T o o m a n y b o s se s 44, 99, 100, 101,

158, 218— D e v e lo p in g a h e a d 98, 99, 100, 101,

— S a f e ty 156, 219* 293— L o a d in g d i r t y c o a l 216, 291, 292— S ta n d a r d iz e d m in e l a y o u t 290, 349— R e p a ir c o s ts ................................................... 348

B r a k e c o n tro l , M ine h o is t ...........................*365B ra s s e s , C a s t in g lo c o m o tiv e jo u r n a l . . *358 B r iq u e t t in g — S a s k a tc h e w a n lig n ite .

G a llo w a y ...................................................... *153B u c k e y e C o a l Co.— D is p a tc h in g a t N e m ac o lin . G a te s

a n d B r o s k y ......................... ........................— W a r p e d m in e c a r p u t in s h a p e *108— M in e r a i l c a r r i e r ........................................— W e ld in g c o a l a u g e r s .................................. *114— H o o k h i tc h in g f o r c o u p lin g . . . . . . . * 2 2 8— S te e l c a n o p y p r o te c ts s p o o lin g d e v ic e . *231 — R iv e t h e a t e r a n d p n e u m a tic h a m m e r *231B u d g e t c o s ts . C ro c k e t t .............................. 95B u lle t in b o a rd ................................................... *51

B u re a u o f M in es— E x i t th e m u le . R o g e r s ......................... *84— F a ta l i t i e s ......................................................47, 105

PageB u re a u o f M in es— C o n t’d — P i t t s b u r g h e x p e r im e n t s t a t i o n ’s n e w

s u p e r in te n d e n t ......................................... 10?— S to c k s , c o a l ............................................ 161, 353B u rn e r , E q u i ta b le d is t r ib u t io n s ta m p s

c o a l ................................................................... *117

C ab le fe d to re e l b y s p o o lin g d e v ic e . ,* 1 1 3 C ab le , s in g le a n d d o u b le c o n d u c to r . . . 271 C ab le s u s p e n s io n .............................................. *50

■\C a n a d a— L ig n ite s o f S a s k a tc h e w a n . G a llo ­

w a y . . . . %.......................................................*152— U n d e rs e a c o a l p ro d u c tio n ..................... 208C a rb id e c o n ta in e r , S a f e t y ............................ 234

C ars— A u to m a tic c u t-o ff u n c o u p le s m in e

c a r s ................................................................... ^ 5 8— C o s t o f n e g le c t— a fa b le . L o n g . . . . **140— C o u p lin g , H o o k h i tc h in g fo r ................— D u m p , R o ll in g c a r .....................................*23^4— M in e c a r c o n v e r te d in to a m b u la n c e * 1 1 0 — M in e -c a r d u m p fo r r e f u s e d i s p o s a l . . *308 — W a r p e d m in e c a r p u lle d b a c k in to

s h a p e .................................................................*108

C h a in d r iv e im p ro v e d ................, ....................*238C h a in , R iv e t le s s ................................................. 61C h ec k h o o k .......................................................... *57C h ic ag o , W ilm in g to n & F r a n k l i n C o a l Co. — M a in b o tto m a t N e w O r ie n t l ig h te d

w i th o u t g la r e ........................................... 56C h in a — L in s i m in e s ......................................... 2 0 JC h r is tm a s s e a ls ...................................... 352C lev is , S a f e ty ro p e ..........................................*3*>9C oa l A g e — N ew m o n th ly ( e ) ....................... 1C oa l A g e N e w s ...................................................... l» 0

C oal— C o n tro l o il to p r o te c t c o a l . .......H a m ­

m o n d * ■• 44— L o a d in g d i r t y c o a l— le t te r s ,216, 291, 292 — P r ic e s . See " P r ic e s .” ^— P ro c e s s in g . M c B rid e .................. *193, *322— P ro c e s s in g . P o r t e r .................................... *39— P r o d u c t io n . S ee " P r o d u c t io n .”— P u lv e r iz e d b u rn e d u n d e r m a r in e

b o i le r s ............................................................. 1 ° 4— S e llin g r i g h t c o a l to r ig h t b u y e r . ___

T a te ..................................................... 139— S o u rc e o f e n e rg y , p re m ie r . S m ith . . 18— S to c k s . S ee “ S to c k s .”

C o a l I n d u s t r y— A n a ly s is c o a l s i tu a t io n . P o la k o v . . . *30 — F e d e r a l r e g u la t io n be a v o id e d ? J o n e s 189 — P r o p o s a l f o r s ta b i l iz in g b i tu m in o u s .

J o n e s ................... 24

C o k e a n d C o k in g— M a r k e ts fo r c o k e .................. 323— P r ic e s ............................ ..................................... 357— W h e r e c o k e -o v en p ro d u c ts g o .......... 323C o lo n ia l C o llie ry Co.— T r o lle y w ire m is h a p s p re v e n te d . . . . * 1 7 2 C o lo ra d o F u e l & I r o n Co.— S a f e ty b y fo r e s ig h t . M c A llis te r . . . * 3 3 0

C o lo ra d o— G o v e rn o r u rg e s s t r ik e s e t t l e m e n t . . 350— S tr ik e , 296, 3 5 0 ; E d i t o r i a l s 288, 346— W a g e a d v a n c e b lo c k s I. W . W 220

C o m p e n sa tio n . See a ls o In s u r a n c e— I n s u r a n c e (e ) .................................... 154— I n s u ra n c e . H a l l ..................................... . . . * 1 8 4— N a tio n a l C o n v e n t io n I n s u r a n c e C o m ­

m is s io n e r s ............................................. 2 2 v

C o m p re s s o r m o v e d w i th o u t m is h a p . . .*232 C o n s o lid a tio n C o a l Co,— A u to m a tic c u t-o ff f o r ro p e h a u la g e *58 — L o n g w a ll a t m in e N o . 153. A b ra m * 6 8 — T r o lle y -w ire m is h a p s p re v e n te d , . . . * 1 7 2 C o n s u m e rs M in in g Co.— S a f e ty s e n t r y fo r b id s m a tc h e s ........... *54— U n d e rg ro u n d m o to r b a r n ......................*114— H o is t in g a t H a m a r m in e .........................*227

4 C O A L A G E Vol. 32

C o n su m p tio n— A n th r a c i te ....................................................... 3 5— A v e ra g e a n n u a l , co a l, U . S .................... 30— B itu m in o u s b y c e n t r a l e le c tr ic p o w e r

p la n ts , c h a r te d . . 48, 106, 164, 224,302, 356

— B itu m in o u s , b y in d u s t r ie s ........... *105, 353-— I n d u s t r i a l a n d r e ta i l c o a l y a r d s . . . . 161— P u b lic u ti l i t ie s , U . S ................................... 65•— S te a m ra i l r o a d s , c h a r te d , .4 S , 106,

164, 224, 302, 356 C o n v ey o rs . See a lso " M illin g M e th o d s ” — B e lt c o n v e y o rs a t P a lm e r m in e o f

F r ic k C o k e C o .............................................. *325— L o n g w a ll w ith c o n v e y o rs . A b r a m . . . *6 S— O ile r a id s c o n v e y o r lu b r ic a t io n ............* 1 1 3— S h a k in g c o n v ey o rs . H a l l ....................... 333— S h ed , g a lv a n iz e d s te e l s h e e ts .............*1 1 S— S p eed d e v e lo p m e n t a t P i t t s b u r g h

C o a l Co. m in e s . G r a y ........................*258C o -o p e ra tio n p ro d u c e s r e s u l ts . L a rn b le 321 C o ro n a d o C o a l Co.— C o u r t d e c is io n . . . . 294 C osts— E x p lo s io n c o s ts ........................................... 7 g— O n ly by k n o w in g e x a c t c o s ts c an

m a n a g e r s su c c e e d (e ) ....................... 3 4 7-— T im b e r ............................................................... 320C o u p lin g , M is a lig n m e n t c o r re c te d b v . . *62 C o u p lin g s a f e ty , H o o k h i tc h in g p r o ­

m o te s ................. »228C o u p lin g , T e n s io n s leev e ............................. *236C o u p lin g s , I n s u la t in g m in e -c a r .................* 1 7 1C o u rts— C o ro n a d o c a s e s e t t le d ............................. 294— D e cis io n on v a lu a t io n o f P . & I t. c .

& I. Co. co a l la n d s .............................. 47w e s t V irg in ia in ju n c t io n a g a in s t

U n io n u p h e ld ........................................... 294C ra n e , 1 0 -to n t ro l le y - ty p e ...........................*108C ru s h in g ro lls . S ee " P r e p a r a t io n .”C u tte r s , C o a l— A u to m a tic w a te r s u p p ly

a l la y s c u t t e r d u s t .................................. *308

D

D a v is C oal & C oke Co.— E m e rg e n c y b o x e s fo r re s c u e te a m s *58 D e p le tio n — b o w - to f ig u re it . K e n n e d y 149D e p re c ia tio n . K e n n e d y ............................. 211D e x te r P o r t l a n d C e m e n t Co.— R o lle r b e a r in g s fo r h e a v y lo a d s . . . * 2 3 7 D is p a tc h in g g e ts r e s u l t s a t N e m ac o lln .

G a te s a n d B ro s k y ................... *65D is p a tc h in g in I ll in o is . K n e e la n d . . .* 1 9 6D o c k in g ta b le c o s ts l i t t l e .................... *172D ra w in g s , P r e s e r v a t io n a n d filin g o f

««OP ■•■••••...................................................... *362D rills an d D rill in g— Coa l C o ........................................ 255-—•S tick in g p re v e n te d b v r e a r - e n d ro -- ta t io n ..............................................................*368— U n iv e r s a l e le c tr ic d r i l l ............................. *178D u c k b ills a t P i t t s b u r g h C o a l Co. m in e s 259D u c k b ills . E d w a rd s ....................................... * 1 3 1D u m p , M in e -c a r ................................................. *308D u m p , S a x o n ...................................................... *286D u m p e r, R o llin g c a r ...................... . . ! ! ! ! , *234D u m p in g s , L a k e ........................................... 3 5 7

D u st. S ee a ls o “ R o c k D u s t ’'— D u st, A u to m a tic w a te r s u p p ly a l la y s

c u t te r ..............................................................*30SD u v in C o a l Co.— S a v e s 6c. p e r to n on p o w e r co sts .

E d w a rd s ' .........................................................*312D y n a m o m e te r c a r ...............................................*20

E

E b e n s b u rg e x p o s i t i o n .....................................E d i to r ia ls

A n th ra c i te fu l ly a w a k e o r p a r t l y so ?— C e n s u re , S a y s w e a r e t a r d y i n ..........— C o m m e rc e c o m m iss io n in a d ile m m a— C o n tin u i ty o f o p e ra t io n .........................

C o st o f id le n e ss in t e rm s o f r e n t . . .— D is t r ic t h e a t in g ...........................................—-D ri l le rs lo s e ‘w a te r ........................... .* !!!!— E r a , A n e w ....................... ; ’ *— F o r e c a s ts h e lp ............................. . ! ! ! ! ! ! !— G ood ro a d s a f a c to r .................................— Id e a s , O r ig in a l ..............................! ! ! ! . ! !— L u m b er , C o u n try u s e s le ss — M a rk e t, T im e to g u a r d a g a i n s t

r u n a w a y ........................................— M e c h a n iz a tio n .........................— M e c h a n iz a tio n re q u ir e s p e r s is te n t

s u p e rv is io n ......................... ........................— M o d e rn m e th o d s b y c o m p a n y s to re s ?— N e x t y e a r ’s s a f e ty p r o g r a m * ...............- Iv,ot .r isk b u t r a t e m a k e s c o m p a n ie s

w i th d r a w .................................................— O n ly b y k n o w in g e x a c t c o s ts c an

m a n a g e r s s u cc e ed . . .— P e a c e in C o lo ra d o ..................

P i t t s b u r g h C o a l C o’s, re o rg a n iz a t io n p la n s ............... ..

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' P a g e ,E d i to r ia l s — C o n t’d— P la y g ro u n d s , U se o f ................................. 43— P r iz e — N o m o re p a n a c e a s .................... 289— R e s e a rc h , n o t rh e to r ic , h o p e o f

a n th r a c i t e ........................................... 2SS— R o c k e fe lle r p la n f a i le d in C o lo ra d o ? 288— S a f e ty — a m a jo r c o n s id e ra t io n .......... 119— S a fe ty d a y o n ly a s t a r t ......................... 214— S ta t is t ic s c a n a id s t a b i l iz a t io n .......... 1 5 4— U se o f " r a s h ” a s b a l l a s t ....................... -96— W h a t ’s o n th e m in d o f th e m a n w h o "

q u i ts ? ............................................................. 214— W h o w o n th e w a r ? ............... 347

E d u c a t io n a n d T r a in in g— F i r s t a id t r a in in g . B a n n i s te r ............*133— F o r e m e n ’s t r a in in g c o n fe re n c e s .

M o sie r ............................................................. 205

E ffic ie n cy th ro u g h p a y ro l l a n a ly s is .W e i r ' ............................................................... 27

E le c tr ic i ty . S ee a ls o “ E q u ip m e n t E le c ­t r i c a l , ” " P o w e r ”

— A t w o rk in g fa ce . K n e e la n d .................*125— P i t t s b u r g h C o a l Co. m in e s . K n e e ­

la n d ................................................................... *269— R e m o te c o n tro l , A u to m a tic ...................*111— R e s is ta n c e fo r m u la , a id in d e te rm in ­

in g ....................................................................... 55— V o lta g e u s e d in m e c h a n iz a t io n N o. S

U n io n P a c if ic m in e ................................*228E le v a to r in w a re h o u s e , P o r t a b l e ..............*308

E q u ip m e n t , xYlr— C o m p re ss o r , M o v ab le a i r ........................ *308— C o m p re ss o rs m o v e d w i th o u t m is h a p . *232 — S h o v e l o p e ra te s on c o m p re ss e d a i r . . *364

E q u ip m en t» E le c t r ic a l— A c ro s s - l in e s t a r t e r s fit a n y m o to r . .* 1 7 4— A rre s te r , L o w -v o lta g e ............................ 365— B a th w a te r h e a te d b y e le c tr ic i ty . . . 358— B a t te r y c h a n g in g d ev ic e ......................*117— B lo w er, P o r ta b l e e le c tr ic ........................ *367— B o n d in g d.c. s y s te m , L a c k o f .............. *360— C o n n e c to r , c o rd -g r ip lo c k in g ............... 175— C o n n e c to rs , S p r in g -c ? ' ........................ *226t—C u r r e n t - m e a s u r in g ............................. *238— D rill , ' U n iv e rs a l e le c tr ic ...........................*17$— E le c tro d e h o ld e r , m e t a l ............................. *178— F lo a t s w i tc h to c o n tro l lin e c o n ­

ta c to r s ............................................................*17$— H a n d s a w , e l e c t r i c ..........................................*116— I n d ic a to r , P h a s e - s e q u e n c e ............ . . . *62"— L id l i f t e r fo r b a t t e r y bo x ......................*174— M e te rs , tw o ty p e s o f w a t th o u r . . . . * 1 7 7— M o to rs , d r y in g w a te r - s o a k e d .............. *114— M o to rs , f a n -d r iv e , P i t t s b u r g h C oal

C o .......................................................... *277— M o to rs , in d u c tio n ....................................... *177— P o r ta b l e a .c . in s t r u m e n t ........................ *366— P u s h - b u t to n c o n tro l f o r s m a ll

m o to r s ........................................ *367— P u s h - b u t to n s t a r t e r .................................. *235— R e la y , s te p - b a c k ........................................... *60— S a n d d r ie r , E le c t r ic .................................. *361— " S e lf - s ta n d in g ” c o n tro l u n i t .................*228— S o le n o id s fo r a .c . a n d d.c; ......................*236— S ta r te r , r e s e t p re v e n te d b y lo c k o u t . . *359 — S p eed r e d u c e r fo r m u lt i - s e rv ic e w o rk *364— S to r a g e b a t te r y , S p u n g la s s m a t

f e a tu r e s .........................................................*365— S w itc h , s m a l l a n d c h e a p m a g n e t ic . .*177— S y n c h ro n o u s m o to r , lo w s p e e d ............*23S— T r a n s fo r m e r s , A. C. o p e ra t io n o f

s ig n a l s b y h o m e -m a d e ........................ *167— V o lta g e t e s t e r ................................................. *176E u r o p e w ro n g o r a r e w e ? P ie rc e . . . * 2 0 3

E x p lo s iv e s . S ee a ls o " B la s t in g "— H is to r y in A m e r ic a ....................................... f l 7 3— P e rm is s ib le p o w d e r u s e d e x c lu s iv e ly

a t C. F . & T. C o ........................................ 331— R e s u l ts o f te s t in g e x p lo s iv e s ............. 316E x p o r ts . S ee " T r a d e a n d C o m m e rc e .”

F a n s a n d B lo w e rs .— E m e r g e n c y fa n d r iv e t a k e s lo a d

a u to m a t ic a l ly . G e a ly .................* 1 8 1— F a n - d r iv e m o to r s a t P i t t s b u r g h

C o a l G o................................ *277— N u m b e r a u to m a t ic a l l y c o n tro lle d

e le c tr ic m in e f a n s ................................. 129— P o r ta b l e e le c tr ic b lo w e r ................. . . . . * 3 6 7— P r e s s u r e g a g e in d ic a te d m a in a i r -

c o u rs e c a v e ..................................................*169— S u n li t f a n -h o u s e a t C h a n d le r m i n e . . *232 — W h is t le , a u to m a t ic f a n ................ *332

F a ta li t ie s— C a u s e s a n d s t a t e s ............ 105— E u r o p e a n c o u n tr ie s .................................... 206— U n ite d S ta te s ............................................ 47, 206

F in a n c ia l— B a n k e r lo o k s a t c o a l m in in g . S is so n 7 — D e p le t io n — h o w to f ig u re it . K e n ­

n e d y ............... 149■—D e p re c ia tio n . K e n n e d y .......................... 211

F i r s t A id a n d M in e R e s c u e ^— E m e r g e n c y b o x e s fo r re s c u e t e a m s . . *58 — P h e lp s -D o d g e C orp ., f i r s t a id w o r k . . *229 — R e s c u e p la n s o f B e th le h e m M in es

C o rp ................................................... *198— T r a in in g , F i r s t - a i d . B a n n i s t e r ' ! *133

W e s t V a . s a f e ty d a y m e e t ................... * 2 2 2

F lo r id a P o r t l a n d C e m e n t Co.— R o llin g c a r d u m p ....................................... *234

.F lo ta t io n a n d h in d e re d s e t t le m e n t c le an c o a l D o c q u ie r , B a ta i l l e a n dB e t t le s to n e ................................................... 209

F o o t- g u a r d re c t i f ie r ..........................................+1G8F o r d s o n C o a l Co.— A u to m a tic re m o te c o n tro l ......................* 1 1 1F o r e c a s t s h e lp ( e ) ........................................... 42F o r e m a n ’s t r a in in g , c o n fe re n c e s . M o sie r 205 F r e ig h t R a te s— I l l in o is - K e n tu c k y r a t e s re v is e d . . . . 160 — L a k e c a rg o , 102, 160 ; E d i to r ia l s . . . 96F r ic k C o k e Co., H . C.— P a lm e r d o c k c o n v ey o r . A u ld ............*325F r i tz , J o h n , g o ld m e d a l a w a r d e d . . . . 294F ro g f-fille r, iro n ................................................. *231F u s e h a s o n y th r e e loose p a r ts , R e n e w ­

a b le .................................................................. 236

G

G a llu p A m e r ic a n C o a l Co.—'S a f e ty m e th o d s .............................................. 159G a s — C o al g a s a n d w a te r g a s p la n ts

c o m p a re d ..................................................... 322G a te s re d u c e s lo p e a c c id e n ts , H i n g e d . . *231 G e a rs , s p l i t ............................................................* 1 1 0

G erm an y .— C o m es b a c k . J u n g s t ................................*340— H a g e n b e c k c o ll ie ry . . ................................*201— ICSG p la n t ........................................................ *40— M a th ia s S t in n e s C o llie ry ........................ *203G len A ld e n C o a l Co.— S h a k in g c o n v e y o rs , a t S to r r s c o ll ie ry 33-1 G o v e rn m e n t— C a n b itu m in o u s in d u s t r y

a v o id f e d e ra l r e g u la t io n ? J o n e s . . 189

G rea t B rita in—O u tn u t, e m p ' . s ■’ n d J »nth,

a t m in e s .................................. Y ; b it» YYyJv— T r a d e s u n io n a c t ......................................... 46G ra n d T u n n e l C o a l Co.— S h a k in g c o n v e y o rs .....................................*333G u a rd s , m a c h in e ......................... *307G u n n -Q iie a le y C o a l Co.— R e g e n e r a t iv e b r a k in g ............................... 109

I t

H a n d s a w , P o w e r -d r iv e n ................................ *307H a r p s , C o n ta c t - s p r ln g .................................. *112H a u la g e . S ee a lso “ T r a c k in g "— A ir- lo c k h a u la g e d o o r ............................ *53— A u to m a tic c u t-o ff fo r ro p e h a u l a g e . . *5S — A u to m a t ic s ig n a l s on u n d e rg ro u n d

h a u la g e . G riffin .....................................*205•— B e n v ln d -W h i te C o a l M g. C o. E n z la n *91 — D ia g ra m o f h a u la g e Z e ig le r N o. l . . . * 1 9 6 — D is p a tc h in g g e ts r e s u l ts . G a te s a n d

B ro s k y .......................................................... *65— D is p a tc h in g in I ll in o is . K n e e la n d . . *190 — S e lf - d e r a i l in g c a r s to p s r u n a w a y

tr i p s ...................... *54— S p ir a l ro l l e r s ................................................... *57■— U n d e rg ro u n d s o f t c o a l m in e s , 1924 . . *S4 — W ire ro p e In oil lu b r ic a te d p ip e

o p e ra te s d e ra i l s ...................................... *55H e a l th a n d s a f e ty In c o a l m in in g . . . . 102H e a t in g , D is t r i c t (e ) ...................... 96H il lm a n C o a l & C oke Co.— T im b e r p r e s e r v a t io n . . . .......................... 317

H o is tin g— B ra k e c o n tro l f o r p o w e r-o p e ra te d

h o is ts .............................................................. *365— B ra k in g , R e g e n e ra t iv e on slo p e

h o is ts .............................................................. *109— C o u n te r k e e p s h o is t t a l ly in s u p t.

office .................................................................*229— R e m o te h o is t c o n tro l s p e e d s c a g i n g . *170 — S h e a v e r ig g in g e x p e d i te s h o is t in g a t

H a m a r m in e ...................... *227;—S te a m h o is t o p e r a te d b y o n e m a n 30

y e a r s ..................................... *229— S tu d ie s , h o is t in g ........................................... 15

H o o k h i tc h in g p ro m o te s c o u p lin gs a f e ty ................................................................ *228

H o o k , Im p ro v e d s te e l ta p e ...........................*306H o u s in g a n d s a f e ty , P i t t s b u r g h C o a l

Co. M cD o w e ll ..........................................*279H u m a n e q u a t io n in c o a l m i n i n g *180H y d r a u la g r a p h .................................................... *305

I ll in o is — S tr ik e e n d s ; a g r e e m e n t .......... 295Im p o r ts . S ee “ T r a d e a n d C o m m e rc e ." In d e x s y s te m o f P i t t s b u r g h C o a l Co.

-e q u ip m e n t .................................................... *273

J

July-December, 1927 C O A L A G E 5

I n la n d C o llie r ie s Co.— V e r t ic a l s t r a in e r s s a v e w e a r on

P u m p s ............................................................... *359in s u ra n c e , c o m p e n s a tio n ( e ) 1 5 4I n s u r a n c e C o m m is s io n e rs , N a t io n a l

c o n v e n t io n ........................................... 2 2 0In s u ra n c e , C o m p e n sa tio n . H a l l * 1 8 4In s u r a n c e — W h y T h e A ss o c ia te d C os.

le f t c o a l field. A rn o ld ....................... 1 4 3I n te r n a t io n a l C h a m b e r o f C o m m e r c e . . 47I n t e r s t a t e C o m m e rc e C o m m issio n —

F r e ig h t r a t e d e c is io n s ......................... 1 0 0I s la n d C re e k C o a l Co.— A b ra s iv e b ra k e s h o e s fo r t i r e s *52— S p lit g e a r s ..................................................... * 1 1 0— C o n ta c t—s p r in g h a r p s fo r w h e e ls ! I ! * 1 1 2 — O ile r a id s c o n v e y o r o r lu b r ic a t io n . .* 1 1 3 — O p e ra to r p ro te c te d b y s p o o lin g

d e v ic e ................................................................— S la te lin e k e e p s ro o m s on c e n t e r " *168— h o o t - g u a r d re c tif ie r ................................. * 1 0 3— D ru m a n d b ra k e d ev ic e fo r b a n d in g *1(18 — R e - t r u c k in g f a c i l i ta te d .......................7 . * 1 7 1

L

B a b o r— C o lo ra d o w a g e a d v a n c e b lo c k s

I. W . W ............................................................ 220E m p lo y e e s a t G t. B r i t a in m i n e s . . . . 329

— R e a c h in g th e m in e r 's h e a r t . W il­l ia m s ................................................................ * 2 3

— S tr ik e , b itu m in o u s , 40, 104, io 3 , 223.294, 350 ; E n d s in 111., Io w a , K a n s .,M o., A rk . a n d O k la ., 295 ; W o o to n 352

— S tr ik e , C o lo ra d o , 2 9 7 ; E d i to r ia ls , 283, 346 L a b o r a to r y a t L ib r a r y ...................................*243

L a m p s a n d L ig h t in gC o n n e c to rs , S p r in g -c lip ..............................* 2 2 6M ain b o tto m i l lu m in a te d w ith o u t

g la r e .................................... *5GL e a d e r o f m e n w a n te d . M cA ullffe" I 1 * 8 2 L ee C o a l Co., G e o rg e F .— S h a k in g con -_ , v e y o rs n t C h a u n c e y ............................ 3 3 5

K * W ilk e s - B a r r e C o a l Co.— E le c t r ic m in e fa n w ith g a s o lin e

e n g in e e m e rg e n c y ............... . . . * 1 8 1

L ig n ite — S a s k a tc h e w a n . C -U o w a yL orn . . ¿ h o y e le rn— B o x -c a r lo a d e r ............................... *2 9 r;— D u c k b ill lo a d e rs a t U n io n "P a c ific

C o a l C o .............................................. *1 3 j— E le c t r ic s t r ip p in g sh o v e l, l a r g e ' I 11 *236 — D p n d e r a n d c a r r i e r in s in g le u n i t . . . *338 — M a c h in e lo a d in g In P i t t s b u r g h sea m .

C la rk ........................................... . . . . . *261— l i n d e n c e n t r i f u g a l bo x c a r " lo a d e r " I !*237— U n d e rg ro u n d s h o v e l lo a d e r ............... *364L o a d in g , m e c h a n ic a l ...................................... 3 5 1L o c o tip p le r a t C h a m p io n m in e . . . . . . . *2S5

L o c o m o tiv e s , .Min r— A b ra s iv e b r a k e s h o e s fo r g a th e r in g

lo c o m o tiv e ............................ * 5 2— D is p la c in g m u le a t P i t t s b u r g h " C o a l

Co. K is e r .................................................... *270— J o u r n a l b ra s s e s ............................................... * 3 5 8

71 in e lo c o m o tiv e fo r th in s e a m s . . . . * 1 7 6 N u m b e r in s o f t c o a l m in e s in 1924 *S5

— P r o d u c t io n d e e p -m in e d c o a l 192 1 b ye le c tr ic lo c o m o tiv e s ................. * sg

— S te e l c a n o p y p ro te c ts sp o o lin g d ev iceon c a b le - re e l lo c o m o tiv e .................*231

— U n d e rg ro u n d lo c o m o tiv e b a r n . . I I I *114 L o w - te m p e r a tu r e d is t i l la t io n . P o r t e r . * 3 9

L u b r ic a t io n— B e a r in g lu b r ic a t io n ................................. * 3 0 6— O ile r a id s c o n v e y o r lu b r ic a t io n . . . . * 1 1 3 — S p r in g o ile r l u b r i c a t in g s y s te m . . . . * 3 6 8

W ire ro p e in o l l - lu b r lc a te d p ip eo p e ra te s d e ra i l s ...................................... * 5 5

L u m b e r , C o u n tr y u s e s le s s (e ) . . ! ! ! ! ! 1 5 5

M

M c E w e n -R u n g e lo w - te m p e ra tu re u n i t . *40M c G ra w -S h a w C o ................................................ 2 9 4

M a c h in e R e p a i r s a n d S h o p E q u ip m e n t— B la c k s m ith fo rg e ....................... * 3 0 6— D ru m - a n d - b ra k e d ev ic e f o r b a n d in g " *168 — E m e r y w h ee ls , s p e c ta c le s o n . . . . * 5 3— F il in g o f s h o p d ra w in g s .......... ' * 3 5 2— F o o t - g u a r d r e c t i f ie r ........................... ! *168— G u a rd s , m a c h in e .................................... *307— H a n d s a w , e le c tr ic ..................................... !* 1 I6— R e c o rd in g p re s s u re g a g e on w h eel

, , P re s s ................................................................ *305— R e p a ir s h o p s a t L ib r a r y o f P i t t s ­

b u rg h C o a l Co. K is e r ........................ *272— S a w a t L ib r a r y sh o p s , p o w e r ..............*271M a d is o n C o a l C orp .— M in e e a r c o n v e r te d in to a m b u la n c e . . *110

- F ir s t - a id t r a in in g . B a n n is te r ............*133M an ag em en t— E d i to r ia l .......................................................... 214

E ffic ie n cy th r o u g h p a y ro l l a n a ly s ts .^ W e i r .................................................................. 3 7

— E n g in e e r s p la n o p e ra t io n s a t P i t t s ­b u rg h C o a l Co. W h ite ....................... 253

M a n a g e m e n t— C o n t’d— F i t th e jo b to th e m a n ............................— 1' u n c tio n in in d u s t r y .............— P r o d u c t io n t im e s tu d ie s a id m a n a g e !

m e n t. Wrh lte ..............................— R a i l ro a d fu e l a n d i ts r e la t io n to" "coal

„ I " ™ m a n a g e m e n t . M a c fa r la n e . . — .S ta b iliz in g b i tu m in o u s in d u s try , p ro -

_ p o s a i fo r . J o n e s ...................................— V ig o ro u s m a n a g e m e n t . M o rro w 111

M ap,3— P i t t s b u r g h C o al Co. P a . m in e s M a r k e t , T im e to g u a r d a g a i n s t r u n ­

a w a y ( e ) ......................... ..........................M a r k e ts , co a l, m o n th ly re v ie w , 49, 107,

M e c h a n ic a l lo a d in g . . . 16 ° ’ 225, 30S' M e c h a n iz a tio n , M ine. B a in M e c h a n iz a tio n r a is e s n ew e le c tr ic a l

p ro b le m s .....................................................M e c h a n iz a tio n r e q u ir e s in c re a s e d "tech!

'd e a l t r a in in g ( e ) .................................M e c h a n iz e f ir s t . D ic k in so n ....................M e rc h a n d is in g . W e llm a n ...............M e rc h a n d is in g , P i t t s b u r g h C oal Co.

H a le ...............................................................

-M ining M e th o d s— B lock s y s te m a t B a n n in g N o. 2 ____— L o n g w a ll a t V a l le y S m o k e le s s C oal

Co. H a ll ............................— L o n g w a ll o r ro o m ? H a l l I!— L o n g w a ll p a y ? R u tle d g e ............ ! . !— L o n g w a ll, R ig h t p la c e fo r . A b r a m . — L o n g w a ll , s c r a p e r m e th o d . J a m e s . . — L o n g w a ll w ith c o n v ey o rs . A b ra m — R o o m -a n d -p i l la r a t P i t t s b u r g h C oal

Co. B ro s k y ..................— S c ra p e r a n d d u c k b ill .............— .Single o r m u ltip le s h i f t s ? P i e r c e . . .M o to r b a r n ..........................................................M o to r f r a m e s m a d e f ro m w e ld e d s te e l .M o to r h o u s in g r in g s w e ld e d ..........M o to rs , P u s h - b u t to n c o n tro l fo r sm a ll M o u n t C a rm e l C h a m b e r o f C o m m e rc e

m e e tin g .........................................M ule, E x i t th e . R o g e r s ..................M u le s a n d h o rs e s a t P i t t s b u r g h C o a i

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N

N e g lec t, T h e c o s t o f. L o n g ......................*140N e m a e o lln , D is p a tc h in g g e ts r e s u l ts .

G a te s a n d B ro s k y ............................ * 6 5N e w E n g la n d , c o a l re c e ip ts ............... 111 225N o r th e rn I l l in o is C o a l C orp .•— E le c t r ic s t r ip p in g sh o v e l, l a r g e *236

OO b itu a ry— C ra w fo rd , C. W .............................................. 220— M elen d y , R . L .............................. ' 2 1 0— W h ite , I. C .................................................... I I I *355-— W rig h t , F r a n k C ...................................... . . ' . 220O ile r a id s c o n v e y o r lu b r ic a t io n .............. * 1 1 3

P

P a in t , r e d p ro te c t iv e ....................................... 237P a y ro l l a n a ly s is , E ffic ien cy th ro u g h .

■Weir ..................................................... 3 jP e a b o d y C o a l Co.— L a c k o f b o n d in g in d.c. s y s t e m *360— T e m p o r a r y w ir in g f irm ly e re c te d . . . * 3 6 0 P e n n s y lv a n ia C o a l & C o k e C orp .— R e p o r t ...................................... 46— B e t te r t r a c k s a t E h r e n f e ld N o . ' 3 '.

I i la k e s le e ........................... 7 0— M in in g m e th o d s . H a i l ................... . I l l * 7 1— R e r a i le r fo r s id e t r a c k u s e ................... *227— Iro n f ro g - f i l le r ............................................... * 2 3 1

P e n n s y lv a n ia— S e c r e ta r y o f M in es a n d d e p u t ie s a p ­

p o in te d ...................................................... *_ 4 6— C h a m b e r o f C o m m e rc e m e e tin g a t

S c ra n to n ................................................ . . . 296

P e r s o n a l M en tio n— A bi-am J C ....................................................... * 6 8*—A iles, C. G ....................... *2S4— A u ld , E . C .................... * 3 9 5— B a y i is s , N e w to n ........................................! *351— B ell, F \ R . ......................... o rp— B e rg tu s , D r. F ....................11111111111 ’ *180*— B rid g e s , W . E * 3 5 9— B risco , D r, X . A . I ........................... . 7 4 5— B u c h a n a n , R . H *0— C a m e ro n , W . . . . * 1 4 9— C la rk , .1. T .................... : : ..................................* , f i |— C o sg ro v e , J . C ....................................................* 8SB— D a w so n , T h o m a s ...................... ’ ’ * 1 0 2— E d w a rd s , J . 1-1............... 9 0 9— E n z ia n . C h a r le s ................. Iq ?— F e a r , T . G .............................. .....................— F is h e r , G ov. J . S .................... H I . 9 5 4

F o rb e s , W , H ......................................... .. *3 i t— G a ry , J u d g e ..................................... 119 *124— G illisp ie , R . W ....................— G la sg o w , W . H .......................I ...................... 4R— G o ld m a n n , C. R ..................................... ] [ [ [ 3 5 2

P e r s o n a l M en tio n — C o n t 'd— G ra d y , W . H .......................— G ra y , T . W .........................— G riffin , H . J ............................— H a a s , F r a n k .......................— H a d e s ty , G . B .......................— H a r r in g to n , G . B .................— H o lb ro o k , E . A ....................— H ood , D r. O. P ....................— H o w a ld , A . M ....................— H o w es , II . C .........................— In g lis , W. W .........................— J o n e s , M a rk M ....................— K e lso , M. M ............................— K is e r , A. B ..............................— K n e e la n d . F . H ....................— L a m b te , R . M .........................— L e B o n , C. B ...........................— L e s h e r , C. E ..........................— L u b e ls k y , B. C ....................— M cA uliffe , E u g e n e ..........— M cD ow ell, C. A ....................— M a c fa r la n e , M alco lm . .— M a h a n , E . C .........................— M alo n e y , A. J .......................■— M o rro w , J . 11............... .... . ,— M o rro w , J . D. A..................— M oses, T h o m a s ..................— M u n g e r , H . P .......................— P a rs lo e , F . L .........................— P a u le y , J . B ...........................— P e r r o t t , G. S t. J o h n . . .— P ie rc e , J . H ...........................— P o la k o v , D r. W . N ............— P o r te r , D r. 11. C .................— R a n d a l l , D . V .......................— R its o n , Col. .1. A . S. . . .— R u tle d g e , J . .1.......................— S c h w a b , C h a r le s M ............— S c o tt, C ol. S. A ....................— S h a w , J . S ..............................— S tu a r t , J a m e s & C ooke .— T u r n e r , S c o tt ....................— W a r r in e r , S. D ......................— W e ir , P a u l ............................— W h ite , J e r o m e C ................— W lg h tm a u W ................—-W illia m s , U n g ............— Y o u n g , L . v.

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P h e lp s -D o d g e C o rp .— F o r e m e n ’s t r a in in g c o n fe re n c e s a t

M o re n c l .......................................................... 205P h i la d e lp h ia & R e a d in g C o a l & I r o n Co.— C o u r t d e c is io n on la n d t a x .................... 47-— A. J . M a lo n e y p re s id e n t ...........................*296P ic k , w ith r e m o v a b le b i t . . .................. *60P ie r s a lw a y s n e a t , T a p e r e d c o lu m n . . * 1 7 2P ln io n - a n d - b e a r ln g p u l le r ...........................*235P ip e th r e a d e r m o to r -d r iv e n , P o r t a b l e . . *177 P i t t s b u r g h C o a l Co.— M ap P a . p r o p e r t i e s f a c in g . . . . . . . . . 240— M e rc h a n d is in g . H a le .................................*241— R e s e a r c h . M o rro w .....................................*244— L a b o r a to r y a t L i b r a r y ............................. *243— P r e p a r a t io n . D u c k ....................................*2 45- R o o m - a n d - p i l l a r s y s te m . B ro s k y . . . * 2 5 0 — E n g in e e r s p la n o p e ra t io n s . W h i te . . . *253— C le a n c o a l. L u b e ls k y ................................*255— C o n v ey o rs . G r a y .......................................... *258— M a c h in e lo a d in g . C la rk ........................ *261— A u to m a tic s ig n a ls . G riffin ................... *265— E le c tr if ic a tio n . K n e e la n d ......................*263— M e c h a n iz a tio n . K is e r .............................. *270— R e c o rd in g e q u ip m e n t. K e lso .............. *273— K n o w in g c o s t o f p o w e r. E d w a r d s . .*275— P u m p s ................................................................. *273-— S a f e ty a n d h o u s in g . M cD o w e ll . . . . * 2 7 9— M id la n d N o. 1 m o d e rn iz e d ......................*281— M u les w e ll fed . A ile s .................................*283— D r a w s la te d is p o s a l ..................................... *285— F a c t s a b o u t c o m p a n y . L e s h e r . . . . 287— R e o r g a n iz a t io n p la n s ( e ) ..................... 288— V a c u u m c le a n e r s a t L i b r a r y .................*304— T r o lle y s h o e s f o r h e a v y s e rv ic e . . . . * 3 0 4— A c id p ro o f p u m p p a r t s ............................. *305— R e c o rd in g p r e s s u r e g a g e ........................ *305— B la c k s m ith fo rg e ..........................................*306—-E le v a te d lire s i r e n ....................................... *306— B e a r in g lu b r ic a t io n .....................................*306— M a c h in e g u a r d s .............................................*307— A u to m a tic w a te r s u p p ly ...........................*308— M o v ab le a i r c o m p re s s o r ...........................*308— P o r ta b l e e le v a to r .......................................... *308— M ln e -c a r d u m p ...............................................*308— C e n t ra l p r e p a r a t io n p la n t ..................... 353— C a s t in g lo c o m o tiv e j o u r n a l b r a s s e s . . *358— M o to r h o u s in g r in g s w e l d e d ................... *361P i t t s b u r g h T e rm in a l C oal C orp .— S w itc h in g p o in t h a s o v e rh e a d l a m p . . *228P la y g ro u n d s , U se s o f ( e ) ............................ 43P o r ts m o u th B y -p ro d u c t C o k e Co.— S p ir a l ro l le r s ................................................... * 3 7P o s t in g d r a w s la te In c u t ............................. *255P o w d e r b a g s o f s p e c ia l f a b r ic ............... 235

P o w e r . See a ls o “ E l e c t r i c i ty ”— A n th r a c i te t u r n s to a u to m a t ic c o n ­

tro l . J e n n in g s ..........................................»129— A t w o rk in g fa c e . K n e e la n d .................*125— K e n tu c k y m in e s a v e s 6 c. p e r to n on

p o w e r c o s ts . E d w a r d s ......................*312— P i t t s b u r g h C o a l Co. E d w a r d s ............* 2 7 5 '— S u b s ta t io n . P o r ta b l e m in e ......................*362— S u b s ta t io n s , a b o v e a n d u n d e rg ro u n d *126 P o s t p u l le r ............................................................*174

6 C O A L A G E Vol. 32

PageP r e p a r a t io n— C ru s h in g ro lls . D u c k *146, *201— D ry c le a n in g a t M o n to u r ........................*249— P a c e p r e p a r a t io n P i t t s b u r g h C o a l Co.

L u b e lsfcy .........................................................*255— F lo ta t io n a t L in s i m in es , C h in a .

D o cq u ie r , B a ta i l le a n d B e t t le s to n e 209— M en z ie s h y d r o - s e p a r a to r ....................... 351— P i t t s b u r g h C o a l Co. M o d e rn iz in g .

D u ck ................................................................*247— 1 0 , 0 0 0 t e s t s c h a r te d to g u id e p r e ­

p a ra t io n . D u c k ....................................... *327P r ic e s— C o al A g e in d e x . . . 4 9 , 106, 1G4, 224,

302, 356P r o d u c tio n— B itu m in o u s a n d a n th r a c i t e c h a r te d ,

48, 106, 164, 224, 302, 356 — -D eep-m ined c o a l in 1924 b y m in e s

u s in g e le c tr ic lo c o m o tiv e s ............. * 8 8— G e rm a n y .......................................................... 342— G t. B r i ta in ............................................. 329— S ea y ie ld s 14,000,000 to n s c o a l

y e a r ly . G ra y ........................................... 208— Y e a r ly , A m e r, c o a l m in e s .................... 30P r o d u c t io n t im e s tu d ie s a id m a n a g e ­

m e n t. W h ite ........................................... *15P u lle y fo r r u b b e r b e lt, F in d in g r ig h t *56P u m p s a n d P u m p in g— A c id p ro o f p u m p p a r t s . ......................*305— C e n tr i fu g a l , r e c ip ro c a t in g a n d r o ta r y

a t P i t t s b u r g h C o a l Co. .....................*.*278— P lu n g e r p u m p , H o r iz o n ta l , fo r m in e s *175 — R e s e rv o ir ta p p e d u n d e r p re s su re ,

U n d e rg ro u n d . H o w ie ...........................*136— S e lf-o ilin g p o w e r p u m p im p e rv io u s

to g r i t ............................................................. *176— v e r t ic a l s t r a in e r s s a v e w e a r on

p u m p s ..............................................................* 3 5 9

R

R a i l c a r r ie r , m in e ................................................110K u ilro n d g— C la ss I— C o al co n su m e d , 4 6 ; C o s t s . . 46

i ue l a n d i t s re la t io n to c o a l m in em a n a g e m e n t. M a c fa r la n e ............... *19

— N ew Y o rk C e n t r a l— In s p e c tio n ofco a l p u rc h a s e d ........................................ 19

R a i ls — D e ra il f a i lu r e ............. *119R a le ig h C o a l & C o k e Co.— B o x -c a r lo a d e r ........................................ *226R e a c h in g th e m in e r ’s h e a r t . W il l ia m s . *2S R ec o rd s , k e ep in g , P i t t s b u r g h C o al Co.

e q u ip m e n t. K e lso ................................*273R e c re a tio n . K n e e la n d ................................. *1 1R e fu s e d isp o sa l, M in e -c a r d u m p f o r . . * 3 0 8R e fu se t r a m w a y , a e r ia l ............... *285R e fu s e u s e d u n d e r b o ile r, p ic k in g -

ta b le ................................................................... 313R e g is te r , R a le ig h ............. . . 1 . . . . . .......... 105R e itz C o a l Co........................................................

G a lv a n iz e d s te e l s h e e ts c o n v e y o rs h e d ............................................................ *118

R e s e a r c h a id s t im b e r p re s e rv a t io n .H o w a ld a n d H u n g e r ............................. *317

R e s e a r c h a t P i t t s b u r g h C oal Co. M o r­ro w ........................... *244

R e s e rv e s o f p r in c ip a l c o u n tr ie s ,’ c o k i . 340 R e s e rv o ir ta p p e d u n d e r p re s su re ,

U n d e rg ro u n d . H o w ie ........................ *136R esc u e . “ S ee F i r s t A id a n d M ine

R es c u e .”R iv e t h e a t e r a n d p n e u m a tic h a m m e r . . * 2 3 1R iv e t in g g ib s , B u c k in g too l f o r ............... *52R o a d s a f a c to r in n a t io n a l p ro s p e r ity ,

G ood (e ) . . . . . t . . . . 97R o a n e I ro n Co.— U n d e rg ro u n d re s e rv o ir . H o w ie . . . . * 1 3 6 K oek D u s t in g— E d i to r ia l ............................................................ 1 5 5— E n t r y a f t e r ro c k d u s t in g . . . ! ! ! ! ! ! *332 — F a ta l i t i e s in ro c k d u s te d m in e s a n d

th o s e n o t ro c k d u s te d ............... 207R o g e r s E lk h o rn C oal Co.— F e e d e r s u sp e n s io n ......................... *50R o o fs . S ee a lso “ T im b e r a n d T im ­

b e r in g ”— F a lls , ro o f . G t. B r i ta in ....................... 329-—H o ld in g b ro k e n ro o f o v e r e n t r y . . . . *5S— S u p p o r ts , I r o n -a rc h p e rm a n e n t ____ *118R o p es— C lev is, S a fe ty ro p e ........................... . . . . * 3 5 9— L ife d o u b le d b y r e g e n e r a t iv e b r a k ­

in g .....................................................................*109— S a fe ty l im it in u s e o f w ire r o p e . . . . 227 — S o c k e tin g w ire ro p e p ro lo n g s i ts

life ................................................................... *51— W ire ro p e , C o r re c t u n r e e l i n g .................*166— W ire ro p e in o il- lu b r ic a te d p ip e

o p e ra te s d e ra i ls ...................................... * 5 5R u s s ia n c o a l d e v e lo p m e n t h a s tw o

m o re A m er, e n g in e e r s .......... 104

SS a fe ty— A c c id e n ts d e c re a s e in W . V a 317— A ir- lo ck h a u la g e - d o o r ............................. * 5 3— A s p r a c t ic e d a t P i t t s b u r g h C o a l Co. 279

PageS a f e ty — C o n t’d— B o sse s t a lk i t o v e r— le t t e r s . .156 , 219, 293— C a re le s s t im b e r in g . F o r b e s ............... *309— C o a l-m in e s a f e ty . A n d re w s ............... 77— C o lo ra d o F u e l & I r o n Co. m in e s .

M c A llis te r ......................................................... *330— E d i to r ia l s ......................................119, 214, 346— H in g e d g a t e s re d u c e s lo p e a c c id e n t s .*231— H u m a n life w o r th s a v in g .................... 124— Ill in o is M g. In s t , d is c u s s e s .................. 23— M a c h in e g u a r d s ............................................ *307— M a n a g e r ’s jo b in s m a l l p la n t . S h a w . 207 — M e c h a n ic a l s e n t r y fo r b id s m a tc h e s . *54— M e e t a t M o rg a n to w n , W . V a ...................*222— M e th o d s o f G a l lu p A m e r ic a n C o a l

C o.......................................................................... 159— O p e ra to r p ro te c te d b y s p o o lin g d e ­

v ice ................................................................... *113— P o w d e r b a g s o f s p e c ia l f a b r i c 235— R e s c u e p la n s o f B e th le h e m M in es

C o rp .......................................................................*198— R o p e c le v is .......................................................*359— S e lf - d e r a i l in g c a r ........................................... *54— S ig n a l p a n e l ...................................................*117— S p e c ta c le s on e m e ry w h e e ls ............... *53— S w itc h in g p o in t h a s o v e rh e a d l a m p . *228 — U n ite d S ta te s la g g in g in s a f e ty .

M cA uliffe ....................................... 206S a m p lin g c o a l a t P i t t s b u r g h C o a l C o .. 243S a n d d r ie r , E le c t r ic .........................................*361S a w , E le c t r i c h a n d .........................................*116S aw , P o r ta b l e p o w e r-d r iv e n ..................*367S c a le , e le c tr ic d ia l ........................................... *238S c h a e f fe r p ro n e p r e s s u r e m e th o d

film ed ................................................................ 300S c ra p e r s a t P a . C o a l & C o k e C o r p . . . *72 S c r a p e r lo a d in g , lo n g w a ll m in in g w ith *81S c r a p e r w o rk in g in l a b o r a to r y ............. *3S ea y ie ld s 14 ,000,000 to n s c o a l y e a r ly .

G ra y ............................................................... 208S e ll in g r ig h t c o a l to r ig h t b u y e r . T a te 139 S h ed , g a lv a n iz e d s te e l s h e e ts c o n v e y o r ..* l lSS h ip m e n ts .— C a rg o c o a l ........................................................ 357— L a k e ..............................................................165, 225S h o r ty a n d M ac d i s c u s s io n s . . . . 4 5 , 99,

157, 217, 291, 349 S h o tf ir in g . S ee “ B la s t in g .”S ig n a l p a n e l ........................................................*117S ig n a ls on u n d e rg ro u n d h a u la g e .

G riffin .............................................................*265S ire n , E l e v a te d f ire ..........................................*306S la te d is p o sa l, R e m o te c o n tro l a s s is t s

in ....................................................................... 112S la te — D r a w s la te d is p o sa l a t P i t t s ­

b u rg h C o a l Co. m in e s ........................ *2S5S la te l in e p a in te d a t fa c e l im its p il in g

o f r e fu s e ...................................................... *168S la te lo a d in g by g r a v i ty ............................ *54S lo t c le a n in g m a c h in e .................................. *116S p eed re d u c e r . W o rm g e a r ........................ *367S q u e e z e s in p i l l a r w o rk in g s , p r e v e n ts . 360S ta b i l i ty , A n a p p ro a c h to ......................... 63S ta b i l iz in g b itu m in o u s in d u s try . J o n e s 24S ta b le s , P i t t s b u r g h C o a l C o ...................... *283S ta n d a r d O il Co. b u y s B e rg iu s r i g h t s . . 160 S ta n d a rd iz e d , e q u ip m e n t P i t t s b u r g h

C o a l C o ......................................................... . *271S ta t i s t i c s c a n a id s ta b i l iz a t io n (e ) . . . 154 S t a t i s t i c s — H o w to p r e p a r e th e m .

H e n se l .......................................................... 205S te e l c a n o p y p r o te c ts s p o o lin g d e v ic e . *231 S tee l, M o to r f r a m e s m a d e fro m w eld ed .* 3 6 6S to c k s , c o a l ....................................... 107. 161, 351S to k e r , c h a in g r a t e ........................................ *61S to k e r , m e c h a n ic a l ........................................... *21S to re s , C a n m o d e rn m e th o d s be u s e d

b y c o m p a n y (e ) ...................................... 347S to r e s m e e t n e w c o m p e tit io n ? C an

c o m p a n y . B r is c o ................................. 344S t r a i n e r s s a v e w e a r on p u m p s , v e r t i ­

c a l .......................................................................*359S tr ik e . S ee " L a b o r .”S tu d ie s a id m a n a g e m e n t . P r o d u c tio n

tim e . W h i te .............................................. *15S tu d ie s , P r o d u c t io n tim e . W h ite . . . . *93S u b m a r in e m in in g ........................................... 20SS y c a m o re C o a l Co.— C h e c k h o o k ..................................................... *57

T

T a n k , p o w e r .........................................................*127T a p e hook , s te e l ................................................. *366T ie s fro m s c r a p r a i l s , M e ta l m in e -

t r a c k ................................................................ *170T im b e r a n d T im b e r in g— C a r e le s s t im b e r in g . F o r b e s ..............*309— O p e n - ta n k p la n ts , s iz e s a n d c o s ts o f

e q u ip m e n t f o r ...................................... 318— P r e s e rv a t io n , R e s e a r c h a id s t im b e r .

H o w a ld a n d M u n g e r . . . . . . . . . . . . *317T im e s tu d ie s a id m a n a g e m e n t , P r o d u c ­

tio n . W h i te ...................... *15T ip p le s—-M o n to u r N o ...........................................................*2S5— D u v in C o a l C o ....................................................*312— R iv e r tip p le a t P a lm e r ...........................*326— R a i l a n d r i v e r ................................................ 246T r a c k in g— B e t te r t r a c k s s t im u la te p ro d u c tio n .

B la k e s le e ....................................................... 70

PageT r a c k in g - C o n t’d— C o n s tru c t io n , M in e t r a c k . H o h n . . *89— F ro g -f i l le r , i ro n ............................................ *231— M e ta l n l in e - t r a c k t ie s f ro m s c r a p

r a i l s ......................... *170-— R e - r a i l e r f o r s id e t r a c k s ......................*227— S w itc h in g p o in t h a s o v e rh e a d l a m p s . *228T r a d e a n d C o m m erc e — E x p o r ts , b itu m in o u s , c h a r t e d . . . . 48,

106, 164, 224, 302, 356— E x p o r ts , U . S ........................... ' ............. 107, 165— G e rm a n im p o r ts a n d e x p o r ts ............. 343T r a m w a y a t M o n to u r N o. 9, t ip p le a n d

a e r ia l re fu s e ............................................ *285T r a n s p o r ta t io n , f a r c r y f ro m m o d e r n . . *120 T r o l le y f irm ly e re c te d , T e m p o r a r y . . . *360 T r o l le y h o is t n e e d s l i t t l e h e a d r o o m . . . . *116T r o l le y s h o e s f o r h e a v y s e r v ic e ..............*304T ro lle y w ire m is h a p s p r e v e n te d .............. *172T r u c k i H ig h - l i f t e le c tr ic ............................. *366T r u c k in g — R e t r u c k in g f a c i l i t a te d by

p i t- b o t to m t r a c k .....................................*171

U

U n d e rc u t t in g , t r a g e d y o f ...........................*18SU n io n C o llie ry Co.— P o r ta b l e m in e s u b s ta t io n ............*362U n io n P a c if ic C o a l Co.— D u c k b ills . E d w a r d s ............................. *131— P r e s s u r e g a g e sh o w e d c a v e .................*169— S p r in g -c lip c o n n e c to r s ............................. *226— M e c h a n iz a tio n r a i s e s e le c tr ic a l p r o b ­

le m s ................................................................... *228— H in g e d g a te s a t s lo p e ............................. *231— S a f e ty ro p e c le v is ....................................... *359U n ite d S ta te F u e l Co.— E le c t r ic s a n d d r ie r ........................ *361U n ite d S t a te s S te e l C o rp .....................119, 124U n ite d S ta te s— E x p o r ts . S ee " T r a d e a n d C o m ­

m e rc e .”— F a ta l i t i e s ..........................................47, 206— P ro d u c tio n . S ee “ P r o d u c t io n .”U n ite d S ta te s F u e l Co.— R e g e n e ra t iv e b r a k in g ................................*109— P r e m a tu r e s h o tf i r in g a v e r te d ..............*230U n ite d S t a te s S te e l C orp .— S ta b i l i ty ................................ 63— P r e s id e n t c o a l s u b s id ia r ie s .................. 1 0 2

V a c u u m c le a n e r s a t L ib r a r y , P a .,w a re h o u s e ..........................................*304

V a lie r C o a l Co.— E le c t r ic a l h e a t in g fo r b a th s .............. 358V a lle y S m o k e le s s C oal Co.—-L o n g w a ll m in in g . H a l l 71, *121V a lv e on r e g u la to r , m a g n e t o p e ra te d

p i l o t s ...................................................................*12°V e n ti la t io n— A ir s h o u ld be s p l i t in lo n g w a ll

m in e s ............................................................... *169— C olo. F u e l Sc I r o n .Co.................. 330— F a n d r iv e t a k e s lo a d a u to m a t ic a l ly ,

E m e rg e n c y . G e a ly ................................*1S1— F e e d e r -o p e n in g d e v ic e a t C h a n d le r

m in e .................................................................*232V ic to r A m e ric a n F u e l Co.— S te a m h o is t o p e ra te d 30 y rs . b y one

m a n ................................................................... *229— F e e d e r o p e n e r a n d s u n l i t f a n -h o u s e ..*232 — B o re h o le s e a s e d b y u n iq u e m e t h o d . . *361

W

W a re h o u s e , P o r ta b l e e le v a to r .................*30S

W a te r— A u to m a t ic s u p p ly a l l a y s c u t t e r d u s t.* 3 0 S— S u p p ly a t P i t t s b u r g h C o a l C o ................. 279W eld in g— A to m ic h y d ro g e n w e ld in g ......................*368-— A u g e rs , w e ld in g c o a l ............................. *114— G a s w e ld in g s te e l p ip e lin e .................. *53— M o to r f r a m e m a d e f ro m w e ld ed

s te e l ............................................... *366— M o to r h o u s in g r in g s w e ld e d ..............*361— P o r ta b l e o u tf i t e n g in e - d r iv e n .............. *174— S h u n tw e ld a r c c o n tro l ............................. *237— W o rn r a i l s a r c w e ld e d ............................. *170W e s t V irg in ia— A c c id e n ts o n d e c re a s e ............ 321— S a f e ty D a y m e e t a t M o rg a n to w n . . . .*222W e s t V i r g in i a C o a l Sc C o k e Co.— B u lle t in b o a rd a t O m a r ....................... *51— W o m e n ’s C lu b o f O m a r ........................ *339W h e e ls — O o n ta c t - s p r in g h a r p s ................... *112W h e e ls c u r ta i l e d b y s p l i t g e a r s ,

L o o se .................................................................*110W o m e n in th e c o a l in d u s t r y ......................*339W o rm g e a r , s p e e d r e d u c e r ...................... . .* 3 6 7

Y

Y a rd a t K o e n ig sb e rg , G e rm a n y , c o a l . . *340

July-December, 1927

A UTHO RS’ INDEX

C O A L A G E 7

Page

AB R A M , J . C. L o n g w a ll w ith c o n ­v e y o rs ................................................... * 6 8

R ig h t p la c e fo r lo n g w a ll ................... *187A ile s , C . G. M u le s w e ll fe d — re a d y

fo r w o rk ........................................... *2S3A n d re w s , J o h n B. C o a l-m in e s a f e ty . . 77 A rn o ld , J . A . W h y th e A ss o c ia te d C os.

le f t c o a l Held .................................... 143A u ld , E . C. R id in g c o a l on r u b b e r . . *325

J g A I N ,, H . F . M in e m e c h a n i z a t i o n . . . 34

B a n n is te r , H . T . F i r s t - a i d t r a i n i n g . . *133 B a ta i l le , Xj . F lo t a t io n a n d h in d e re d

s e t t le m e n t c le a n c o a l ............... 2 0 0B la k e s le e , S. W . B e t te r t r a c k s ......... 70B risco , D r. N . A . C o m p a n y s t o r e s . . . 315 B ro s k y , A . F . D is p a tc h in g g e ts r e ­

s u l t s ....................................................... *65 R o o m -a n d -p l l la r a t P i t t s b u r g h

C o a l C o ................................................... *250B u c h a n a n , R . H . A n th r a c i te c h a r ts

n e w c o u rs e .................................... 9

^ A M E R O N , W . A c c id e n ts ................... 142

C la rk , J . T . M a c h in e lo a d in g ..................*261C ro c k e t t , H . G. C o s ts im p o r ta n t ,

b u d g e t th e m ................................... 9 5

D IC K IN S O N , A. W . M ec h a n iz ef i r s t ................................. * ................. *3

D o c q u te r , A lex . F lo t a t io n a n d h in ­d e re d s e t t le m e n t c le a n c o a l . . 209

D u ck , F . J . G . A n th r a c i te p r e p a r a ­tio n ........................................................*146

C ru s h in g ro l l s ...........................................*201 M o d e rn iz in g p r e p a r a t io n ................... *245 1 0 , 0 0 0 t e s t s c h a r te d to g u id e

p r e p a r a t io n ....................................... *327

jg D W A R D S , J . H . D u c k b ills .................*131

P o w e r , P i t t s b u r g h C o a l C o .................*275 K e n tu c k y m in e s a v e s 6 c. p e r to n . *312E n z ia n , C h a r le s . H a u la g e a d ju s tm e n t . *91

'C 'O R B E S , W . H . C a re le s s t im b e r - x in g *309

p A L L O W A Y , J O H N . L ig n i te o fS a s k a tc h e w a n .................................. *153

G a te s , W . H . D is p a tc h in g g e ts r e ­s u l t s ....................................................... *65

G e a ly , E . .T. E m e r g e n c y fa n d r iv eta k e s lo a d a u to m a t ic a l l y . . . . * 1 8 1

G ra y , F . W . S e a y ie ld s 14 ,000,000to n s o f c o a l y e a r ly .................... 208

G ra y , T . W . C o n v e y o rs s p ee d d e v e lo p ­m e n t ........................................................*258

G riffin , H . J . A u to m a tic s ig n a l s o nu n d e rg ro u n d h a u la g e .................*265

O A L E , S Y D N E Y A. T a k in g g u e sso u t o f m e rc h a n d is in g .................*241

H a ll , R . D a w s o n . L o n g w a ll o r ro o m ? . *71 L o n g w a ll s a v e liv e s a n d d o l l a r s ? . *121 C o m p e n sa tio n i n s u r a n c e ........................ *184— — S h a k in g c o n v e y o rs ................................* 3 3 3H a m m o n d , J o h n H a y s . C o n tro l o il to

p r o te c t c o a l .............. "..................... 14H e n se l, H . G. S ta t i s t i c s — H o w to p r e ­

p a r e th e m ......................................... 205H o h n , F . C. M in e t r a c k c o n s tr u c t io n

m e th o d s ............................................... * 8 9H o w a ld , A . M . R e s e a r c h a id s t im b e r

p re s e r v a t io n ...................................... * 3 1 7H o w ie , H o w a rd . U n d e rg ro u n d r e s e r ­

v o i r ...........................................................

PageT A M E S , W . E . B e t te r c o a l f ro m

J lo n g w a ll * 3 3 7J e n n in g s , .1. T . A n th r a c i te t u r n s to

a u to m a t ic c o n tro l ........................ *129J o n e s , M a rk . S ta b i l iz in g b itu m in o u s

I n d u s try .............................................. 24 C a n b i tu m in o u s I n d u s try a v o id

fe d e ra l r e g u la t io n ? ........................ 189J u n g s t , D r. E . G e rm a n y c o m e s b a c k . . *340

j r - E N N E D Y , T . F . D e p le t io n ............. 14 9

— — D e p re c ia tio n ............................................... 2 1 1K is e r , A. B. S e rv ic in g m in e fo r

m e c h a n iz a t io n .................................. *270K n e e la n d , F r a n k H . R e c re a t io n . . . . * 1 1 P o w e r a t w o rk in g fa c e .........................*125 D is p a tc h in g in I l l in o is ......................*196 E le c tr i f ic a t io n e a r n s 4 5% .................*268

T A M B IE , R . M. C o -o p e ra tio n p ro -•*-'.......................d u c e s r e s u l ts ....................... 321L e s h e r , C. E . F a c t s a b o u t P i t t s b u r g h

C o al C o ................................................... 287L o n g , D. II. C o st o f n e g le c t .................... *140L u b e is k y , B. L . C le a n c o a l ......................*255

|U C A L L I S T E R , R O B E R T . S a f e ty a tJ- '-I m in e s o f C. F . & I. C o ................*330M cA uliffe , E u g e n e . W a n te d — le a d e r

o f m en ................................................ *82 L a g g in g in s a f e ty ..................................... 206M cB rid e , R . S. C h e m ic a l e n g in e e r

lo o k s o n c o a l ..................................... * 1 9 3 C oal a n d g a s m a n b e p a r tn e r s ? . . *322M cD ow ell, C. A . S a f e ty a n d h o u s ­

in g .......................................................* 2 7 9M o rro w , J . B. R e s e a r c h d is p la c e s

ru le -o f - th u m b ......... ..............................*244M o rro w , J . D . A . V ig o ro u s m a n a g e ­

m e n t ........................................................... 239M o sie r, M c H e n ry . F o r e m e n ’s t r a in in g

c o n f e r e n c e s , ......................................... 205M u n g e r , H . P . R e s e a r c h a id s t im b e r

p r e s e r v a t io n ...................................... *317

T J IE R C E , J . H , I s E u r o p e w r o n g o rx a r e w e ? ...............................................*203P o la k o v , D r. W . N . C o a l s i tu a t io n . . . 30P o r te r , D r. H . C. C o a l p r o c e s s i n g . . . *39

J ^ O G E R S , H . O. E x i t th e m u ie . . . . *84

R u tle d g e , J . J . D o e s lo n g w a ll p a y ? . . . * 7 9

C H A W , J . S. S a f e ty in a s m a l lt-i p la n t 207S is so n , F r a n c is . B a n k e r lo o k s a t co a l

m in in g ................................................. 7S m ith , G eo. O tis . C o al, th e p re m ie r

s o u rc e o f e n e r g y .......................... i s

TA T E , G. M. S. S e ll in g r i g h t c o a l tor ig h t b u y e r ...................................... 139

WA G N E R , C. IV . C o n tro lle d b l a s t ­in g .......................................................... 315

W a r r in e r , S. D . A n th r a c i te a w a k e . . . 70 W e ir , P a u l . E ffic ien cy th ro u g h p a j>

ro ll a n a ly s i s ................................... 37W e l lm a n . H a r r y . M e r c h a n d is in g . . . . 35W h ite , J e r o m e C. P r o d u c t io n tim e

s tu d ie s *15, *93W ill ia m s , W h it in g . R e a c h in g th e

m in e r ’s h e a r t ................................... *28W o o to n , P a u l . E ffic ie n t u se o f c o a l . . 221 E f fe c ts o f a n th r a c i t e s t r ik e . . . . 297 B itu m in o u s s t r ik e ................................. 352

.rageB O S S E S T A L K IT O V E R — L E T T E R S

^ N D R E W S , F . J . T o o m a n y b o sse s . 293

T J E N N E T T , A . O ld a r m y g a m e c a u s e■*-' o f tro u b le .......................................... 1 0 0■ L e a d e r s a r e n e e d e d ............................ 218B e n n e t t , J o h n . D o e s S a f e ty p a y ? . . . . 293 B o h n , J o h n . F o r e m a n s o m e tim e s m u s t

w o rk a lo n e ......................................... 217 C le a n c o a l ................................................... 291 S t a n d a r d iz a t io n .....................................’ 3 4 9B o tto m le y , E d w a rd . T o o m a n y b o sse s . 1U1

^ O N L E Y , J . H . S a f e ty t a lk h e l p s . . 219

| ^ .V V iS , j . t v . T o o m a n y b o s s e s . . . 99

D u ra c ln e , B . T o o m a n y b o s s e s ............. 101

J ^ L Y , I. L . W h y d id m o to r s t a l l ? . . . 100

f M i l l E N , F . F . D e v e lo p m e n t c a n beV-J b a la n c e d .............................................. 1 5 7- —^ -L o a d in g d i r t y c o a l .........................' ’ . . 292G rim m , C. T . L a c k o f c o - o p e r a t io n . . 1 0 0 P u s h th e w e s t m a in s ............................ 217 C le an c o a l g u a r a n te e d ....................... 292 M o d if ic a tio n in e n g in e e r in g s u r v e y 3 4 9

H O Y E . J . F . A c c id e n ts ......................... 293

T A M E S , T H O M A S . B o sse s s h o u ldJ k n o w th e i r s tu f f .............................. 9 9 S a f e ty a lw a y s p a y s ......................... 219 L o a d in g d i r t y c o a l ............................... 292

T A W , S A M U E L . L e t s u p e r h a v e l a s t‘L / w o rd ......................................................... X58

^*££hew . W h y d id m o to r s t a l l ? 101 L lg h tb u rn , R . W . C o -o rd in a t io n b e s t

p o lic y .................................................... 3 4 9L I t t le m a n , I. M. A . T o o m a n y b o sse s . 101L iv e ly , C. E . S y s te m is l a c k in g 158 Ivace p r e p a r a t io n in s p e c to r ............. 292L u x to n , W . H . G o o d l ig h t n e c e s s a ry

in lo a d in g c o a l ............................... 217

A /fA R L A N D , J O H N . L a c k o f co -o p e ra t io n ............................................. 1 0 0

p L O D D E R , A . T o o m a n y b o s s e s . . . . 101

Q E E S E , M A T . E m p lo y c o m p e te n t^ e le c t r ic ia n ......... ....................................... 103- — -W h y a r e n o t c o n d itio n s m a d e s a f e ? 219 S n y d e r , H u g h . T o o m a n y b o s s e s . . . 100 b t i th , V a n B . C le a n c o a l .......................... 291

V T E A S E Y , V . S. W is e s p e n d in g v s a v e s ...................................................... 293

y y A L K E R , W . J . U p to th e b ig b o s s 157

"W alton , H . T . D e v e lo p m e n t a h e a d isn e c e s s a r y .......................... 1 5 7

S a f e ty p a y s .......................................... .. _ 2 19 E x t r a c o m p e n s a tio n f o r h a r d

w o rk in g s ............................................. 291——- S ta n d a r d i z a t io n .......................................’ 3 4 9W e ih le , C. R . C o -o p e ra t io n is n e e d e d . 218