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Advances in Nuclear Science and Tech-nology. vol. 2. Ernest J. Henley andHerbert Kouts, Eds. Academic Press,New York, 1964. 388 pp. Illus. $14. Sixpapers: "Reactor transfer functions," Ce-sar Sastre; "Heat exchangers in nuclearpower plants," George T. Lewis, Jr.,Michael Zizza, and Paul DeRienzo; "Theformation of free radicals in polymers byradiation, their reactions and reactivi-ties," M. G. Ormerod; "Measurementsof reactor parameters in subcritical andcritical assemblies," Irving Kaplan; "Scat-tering of thermal neutrons from solidsand their thermalization near equilib-rium," L. S. Kothari and V. P. Duggal,and "Some aspects of the use of digitalcomputers in nuclear reactor design,"Bernard W. Roos and Ward C. Sangren.

Advances in Structure Research byDiffraction Methods. vol. 1. R. Brill, Ed.Vieweg, Braunschweig, Germany; Inter-science (Wiley), New York, 1964. 227pp. Illus. $13.50. Six papers: "The deter-mination of crystal structures by neutron-diffraction measurements," G. E. Bacon;"Fourier synthesis of potential in electrondiffraction structure analysis and its appli-cations to the study of hydrogen atoms,"B. K. Vainshtein; "The determination ofphase angles," J. Karle; "Die thermischeUntergrundstreuung und ihre Anwendungzur Strukturuntersuchung von Molekulenin Kristallen," W. Hoppe; "AllgemeineGesichtspunkte fur die Deutung diffuserInterferenzen von fehlgeordneten Kris-tallen," H. Jagodzinski, and "Antisym-metry, colour symmetry and degeneratesymmetry," A. Niggli.

Alicyclic Compounds. Douglas Lloyd.Elsevier, New York, 1964. 181 pp. Illus.$6.50. A textbook aimed at the "honoursundergraduate student or the non-special-ist postgraduate."

Analysis in Function Space. Proceed-ings of a conference (Dedham, Mass.),June 1963. William Ted Martin and Irv-ing Segal, Eds. M.I.T. Press, Cambridge,Mass., 1964. 224 pp. Illus $6.

Analytical Chemistry of Niobium andTantalum. Ross W. Moshier. Pergamon,London; Macmillan, New York, 1964.284 pp. Illus. $12.75.

Applied Physics. Herman W. Pollack.Prentice-Hall, Englewood Cliffs, N.J.,1964. 784 pp. Illus. $13.25.Chemistry: A Physical Approach. Wil-

liam F. Sheehan. Allyn and Bacon, Bos-ton, 1964. 615 pp. Illus. $8.75.

Chemistry and Technology of Explo-sives. vol. 1. Tadeusz Urbanski. Trans-lated from the Polish edition by IrenaJqczalikowa and Sylvia Laverton. Perga-mon, London; Macmillan, New York,1964. 651 pp. Illus. $15.Chemistry in Premixed Flames. C. P.

Fenimore. Pergamon, London; Macmil-lan, New York, 1964. 129 pp. Illus. $5.

Chimica Generale e Inorganica. Giu-seppe Bruni. Tamburini Editore, Milan,Italy, ed. 12, 1964. 748 pp. Illus. L.7,000.

Collision Phenomena in Ionized Gases.Earl W. McDaniel. Wiley, New York,1964. 797 pp. Illus. $17.50.

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berger and Kenneth M. Watson. Wiley,New York, 1964. 929 pp. Illus.

Colored Symmetry. A series of publi-cations from the Institute of Crystallog-raphy, Academy of Sciences of theU.S.S.R., 1951-1958. A. V. Shubnikov,N. V. Belov, and others. Translated fromthe Russian editions by Jack Itzkoff andJack Gollob. William T. Holser, Ed. Per-gamon, London; Macmillan, New York,1964. 289 pp. Illus. $9.75.Concepts of Real Analysis. Charles A.

Hayes, Jr. Wiley, New York, 1964. 202pp. Illus. $6.50.

Concise Inorganic Chemistry. J. D.Lee. Van Nostrand, Princeton, N.J., 1964.260 pp. Illus. $8.50.

Cryogenics. Michael McClintock. Rein-hold, New York; Chapman and Hall,London, 1964. 282 pp. Illus. $10.75.The Cyanine Dyes and Related Com-

pounds. Frances M. Hamer. Interscience(Wiley), New York, 1964. 724 pp. Illus.$45.

Descriptive Physical Oceanography.An introduction. George L. Pickard. Per-gamon, London; Macmillan, New York,1964. 207 pp. Illus. $4.50.The Development of Weak Interaction

Theory. P. K. Kabir, Ed. Gordon andBreach, New York, 1963. 312 pp. Illus.$4.95Developments in Applied Spectros-

copy. vol. 3. Proceedings, 14th AnnualMid-America Spectroscopy Symposium(Chicago, Ill.), May 1963. J. E. Forretteand E. Lanterman, Eds. Plenum Press,New York, 1964. 419 pp. Illus. $17.50.

Differential Equations with Applica-tions. Herman Betz, Paul B. Burcham,and George M. Ewing. Harper and RowNew York, ed. 2, 1964. 358 pp. Illus.$7.50.

Digital Storage Systems. William Ren-wick. Wiley, New York, 1964. 222 pp.Illus. $8.50.

Elastic Liquids. An introductory vectortreatment of finite-strain polymer rheol-ogy. A. S. Lodge. Academic Press, NewYork, 1964. 401 pp. Illus. $12.

Electrical Circuits with Variable Pa-rameters, Including Pulsed-Control Sys-tems. V. A. Taft. Translated from theRussian edition (Moscow, 1960) by F.Immirzi. R. C. Glass, Ed. Pergamon,London; Macmillan, New York, 1964.121 pp. Illus. $7.50.Elements of Compressible Flow. F.

Cheers. Wiley, New York, 1963. 174 pp.Illus. $6.

Elements of the Theory of Gases. Sid-ney Golden. Addison-Wesley, Reading,Mass., 1964. 160 pp. Illus. $5.

Essentials of Algebra and Trigonom-etry. Frederick H. Young. Addison-Wesley, Reading, Mass., 1964. 158 pp.Illus. $5.

Expected Values of Discrete RandomVariables and Elementary Statistics. AllenL. Edwards. Wiley, New York, 1964.158 pp. Illus. Paper, $3.95; cloth, $5.95.

Extrusion of Plastics. E. G. Fisher.Iliffe, London; Interscience (Wiley), NewYork, ed 2, 1964. 271 pp. Illus. $12.The Feynman Lectures on Physics. vol.

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Fluvial Processes in Geomorphology.Luna B. Leopold, M. Gordon Wolman,and John P. Miller. Freeman, San Fran-cisco, Calif., 1964. 536 pp. Illus. $10.

Free Radical Reactions in PreparativeOrganic Chemistry. George Sosnovsky.Macmillan, New York, 1964. 456 pp. Illus.$17.Frequency Filter Methods. Torbern

Laurent. Wiley, New York; Almqvist andWiksell, Stockholm, 1964. 320 pp. Illus.$17.50.

Frequency of Self-Oscillations. JanuszGroszkowski. Pergamon, London; Mac-millan, New York, 1964. 542 pp. Illus.$15.The Gas-Phase Oxidation of Hydrocar-

bons. V. Ya. Shtern. Translated from theRussian edition (Moscow, 1960) by M. F.Mullins. B. P Mullins, Ed. Pergamon,London; Macmillan, New York, 1964.720 pp. Illus. $28.50.Gun Drilling and Trepanning. A prac-

tical and intensive treatment of the tools,machines, processes, and related ele-ments in the precision machining of deepholes. Prepared under the supervision ofthe American Soc. of Tool and Manu-facturing Engineers. Prentice-Hall, Engle-wood Cliffs, N.J., 1964. 160 pp. Illus.$6.95.Handbook of Preparative Inorganic

Chemistry. vol. 1. George Brauer, Ed.Translated from the German edition(Stuttgart, 1960) by Scripta Technica.Reed F. Riley, Ed. Academic Press, NewYork, ed. 2, 1963. 1030 pp. Illus. $36.High Speed Testing. vol 4. A sym-

posium (Boston, Mass.), May 1963. Al-bert G. H. Dietz and Frederick R. Eirich,Eds. Interscience (Wiley), New York. 314pp. Illus. Paper, $12.80.

High-Velocity Forming of Metals. Aconcise yet intensive treatment of themechanics, principles, equipment, andmethods employed in the forming ofmetals by the explosive, electro-hydraulic,magnetic-pulse, and pneumatic-mechani-cal processes. Prepared under the su-pervision of the American Soc. of Tooland Manufacturing Engineers. Prentice-Hall, Englewood Cliffs, N.J., 1964. 202pp. Illus. $7.50.

Information Theory. An introductionfor scientists and engineers. Gordon Rais-beck. M.I.T. Press, Cambridge, Mass.,1964. 117 pp. Illus. $4.An Introduction to Crystallography.

F. C. Phillips. Wiley, New York, ed. 3,1964. 350 pp. Illus. $6.Introduction to Field Theovry and Dis-

persion Relations. R. Hagedorn. Per-gamon, London; Macmillan, New York,1964. 135 pp. Illus. $5.An Introduction to Industrial Radiol-

ogy. J. C. Rockley. Butterworth, London,1964. 247 pp. Illus. $10.75.

Introduction to Mathematics. Bruce E.Meserve and Max A. Sobel. Prentice-Hall,Englewood Cliffs, N.J., 1964. 302 pp.Illus. $5.95.An Introduction to Modem Physics.

H. Messel and S. T. Butler, Eds. St. Mar-tin's Press, New York, 1964. 273 pp.Illus. $5.

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Switching Systems. H. C. Torng. Addison-Wesley, Reading. Mass., 1964. 298 pp.Illus. $9.75.An Introduction to the Theory of the

Formation of Frozen Rocks. T. A. TVu-tyunov. Transl-ited from the Russian edi-tion hv J. 0. H. Muhlhaus. Pergamon.London: Macmillan, New York, 1964.108 pp. Illus. $7.50.

Invariant Imbedding and Time-Depend-ent Transport Processes. R. E. Bellman.H. H. Kagiwada. R. E. Kalaba. and NI. C.PrestruLd. Elsevier. New York, 1964. 270pp. Illtus. $7.50A Laboratory Course in General Cheni-

istry. Wendell NI. Latimer and RichaardE. Powell. Maccmillan, New York, 1964.144 pp. lluis. Paper. $2.95.

Limits and Continuity. William K.Smith. Macmillkn. New York, 1964. 142pp. Illus. Paper, $3.

Lo", Temperature Physics. Proceedings.8th International Conference (London).September 1962. R. 0. Davies. Ed.Buttei-wou-th, Washington. D.C., 1963. 465pp. IIlIs. $39.

Marine Geology of the Pacific. H. W.Menard. McGraw-Hill. New York, 1964.285 pp. lIlIts. $12.50.

Materials and Fuels for High-Tempera-ture Nuclear Energy Applications. Pro-ceedings, Nuational Topical Meeting,American N uclear Societv (San Diego.Calif.), April 1962. NI. T. Simnad andL. R. ZuLmlwalt, Eds. M.I.T. Press. Camn-bridge. M4ass.. 1964. 423 pp. Illus. $12.The Mathematical Principles of Nat-

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Matrix Methods in Optical InstrumentDesign. Willem Brouwer. Benjamin, NewYork, 1964. 302 pp. Illus. Paper, $5.95;cloth. $9.The Mechanics of Turbulence. Proceed-

ings (in English) of the symposiumsponsored by the Centre National de laRecherche Scientifiqtue (Marseilles,France). AuLgust-September 1961. Gor-don and Breach, New York, 1964. 460 pp.Illus. $19.50.Modern Basic Mathematics. Hobart C.

Carter. Appleton-Century-Crofts. NewYork, 1964. 478 pp. Illus. $6.50.Modern Inorganic Pharmaceutical

Chemistry. Clarence A. Discher. Wiley,New York, 1964. 648 pp. Illus. $12.

Nonlinear Integral Equations. Proceed-ings of an advanced seminar conductedby the Mathemaltics Research Center, U.S.Army (Madison. Wis.), April 1963. P. M.Anselone. Ed. Univ. of Wisconsin Press,Madison, 1964. 390 pp. Illus. $6.50.

Nonlinear-Magnetic Control Devices.Basic principles, characteristics, and ap-plications. William A. Geyger. McGraw-Hill. News York. 1964. 420 pp. Illus.$12.50.Nuclear Interactions. Sergio DeBene-

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Micro- and Semimicro Methods. Nich-olas D. Cheronis and T. S. Ma. Inter-science (Wiley), New York, 1964. 722pp. Illus. $25.Organolead Chemistry. A concise review,

with special reference to the literaturecovering the period January 1953 to July1963. L. C. Willemsen. Prepared for theInternational Lead Zinc Research Organ-ization (New York) by Organische Chem-ische Institut, Utrecht, Netherlands, 1964.111 pp. Free.PCT, Spin and Statistics, and All

That. R. F. Streater and A. S. Wightman.Benjamin, New York, 1964. 191 pp. Illus.Paper, $4.95; cloth, $9.

Physics of Atomic Collisions. J. B.Hasted. Butterworth, Washington, D.C.,1964. 546 pp. Illus. $26.

Principles of Chemistry. Joel H. Hilde-brand and Richard E. Powell. Macmillan,New York, London, ed. 7, 1964. 413 pp.Illus. $7.50.The Principles of Mathematics. Bert-

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Progress in Reaction Kinetics. vol. 2.G. Porter, Ed. Pergamon, London; Mac-millan, New York, 1964. 399 pp. Illus.$15. Eight papers: "The rate constantsof halogen atom reactions," G. C. Fettisand J. H. Knox; "Mercury photosensitizedreactions," R. J. Cvetanovi6; "The reac-tions of methylene and some simple car-benes," H. M. Frey; "The kinetics ofcis-trans isomerizations," R. B. Cundall;"The kinetics of propagation of anionicpolymerization and co-polymerization,"M. Szwarc and J. Smid; "Rate constantsof protolytic reactions in aqueous solu-tion," M. Eigen, W. Kruse, G. Maass,and L. De Maeyer; "The rates of reactionof some haem compounds," Q. H. Gib-son; and "Kinetic treatment of consecu-tive processes," R. M. Noyes.

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Pyrazolones, Pyrazolidones, and Deriv-atives. Richard H. Wiley and Paul Wiley.Interscience (Wiley), New York, 1964.555 pp. Illus. $26.

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* non-wettable...minimizes meriiscus,reduces drainage"hold-back" errors

* chemically clean* biologically clean* crystal clear* cotton plugged* sharp graduations

3 graduation markings

1 mIxO.11 ml x 0.011.1 mlI (0.5, 1.0,1.1graduations)

convenient usepackages

100 (individuallywrapped) in dispensingbox, or 25 in "poly"bag and other packageforms. Availablethrough your local dis-tributor.

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SCIENCE, VOL. 145

I

NOW.."A PRACTICAL LASERIPerkin-Elmer's Model 5200 is so compact... so rugged . . . so simple to use, that itmakes practical almost any applicationrequiring the unique characteristics of acontinuous laser beam .. . even on pro-'duction equipment.

This stable, noise free source of brightcoherent light is already replacingexpensive and hard -to-use opticalalignment and measuring systems.Furthermore, it is extending the use ofprecise alignment and measuring systemsto applications previously consideredimpractical.

For applications requiring a lot of lightin a small diameter beam, the brightnessof the Model 5200 is thousands of timesgreater than the most intense arc lamps.

When precise dimensions are important,the coherent nature of laser light..,to adegree never before possible...extendsthe use of interferometry to entirelynew applications.

Are you considering using a laser?To obtain detailed information on theModel 5200 laser, contact Electro-OpticalProduct Marketing, Perkin-Elmer Cor-poration,910 Danbury Road, Norwalk,Connecticut. Or phone 203-847-0411.

PERKIN-ELMER

Recent Geomorphic History of thePontchartrain Basin. Roger T. Saucier.Louisiana State Univ. Press, BatonRouge, 1963. 128 pp. Illus. Paper, $3.

Rectified Lunar Atlas. Suppi. No. 2,Photographic Lutnar Atlas. E. A. Whit-aker, G. P. Kuiper, W. K. Hartmann,and L. H. Spradley. Univ. of ArizonaPress, Tucson, 1963. Unpaged. Illus.Plates. $35.La Retention et la Migration des Ions

Radioactifs dans les Sols. An interna-tional colloquium (Saclay, France), Oc-tober 1962. Centre d'Etudes Nucleairesde Saclay, Gif-sur-Yvette; Presses Uni-versitaires de France, Paris, 1963. 296pp. Illus.

Rheo-optics of Polymers. A symposium(Amherst, Mass.), August 1963, heldunder the auspices of the Polymer Re-search Institute. Interscience (Wiley).New York, 1964. 200 pp. Illus. Paper, $8.

Several Complex Variables. Local the-ory. M. Herv6. Published for the TataInstitute of Fundamental Research (Bom-bay, India), by Oxford Univ. Press, NewYork. 1963. 142 pp. llus. Paper, $4.

Signal Detection and Recognition byHuman Observers. Contemporary read-ings. John A. Swets, Ed. Wiley, NewYork, 1964. 714 pp. Illus. $17.50.

Solubilities of Inorganic and OrganicCompounds. vol. 2. pt. 1, Ternary Sy.s-teen7s. H. Stephen and T. Stephen, Eds.Pergamon, London; Macmillan, NewYork, 1964. 944 pp. $28.50.

Space Physics and Radio Astronomy.H. Messel and S. T. Butler, Eds. St.Martin's Press, New York, 1964. 174 pp.Illus. $4.25.

Statistical Mechanics of Charged Par-ticles. R. Balescu. Interscience (Wiley),New York. 1963. 491 pp. Illus. $15.The Structure of Atmospheric Turbu-

lence. John L. Lumley and Hans A.Panofsky. lnterscience (Wiley), NewYork, 1964. 251 pp. Illus. $9.50

Tables of Spectrophotometric Absorp-tion Data of Compounds Used for theColorinietric Determination of Elements.Prepared by the Commission on Spectro-chemical and other Optical Proceduresfor Analysis. Butterworth, Washington,D.C., 1963. 642 pp. Illus. $25.

Theory and Application of the z-Trans-form Method. E. I. Jury. Wiley, NewYork, 1964. 344 pp. Illus. $11.50.

Theory and Methods of Nuclear Reac-tor Calculations. G. I. Marchuk. Trans-lated from the Russian edition (Moscow,1962). Consultants Bureau, New York,1964. 207 pp. Illus. Paper, $40.The Theory of Recycle Processes in

Chemical Engineering. M. F. Nagiev.Translated from the Russian edition(Moscow, 1958) by R. Hardbottle. R. M.Nedderman, Ed. Pergamon, London; Mac-millan, New York, 1964. 294 pp. Illus.$15.

U.S.S.R. Direct Current Research. Re-ports of the Leningrad Direct CurrentResearch Institute. Translated from theRussian edition (Moscow, 1957) by LouisAnderson Fenn. Pergamon, London; Mac-millan, New York, 1964. 295 pp. Illus.$15.The Universe and Its Origin. H. Messel

and S. T. Butler, Eds. St. Martin's Press,New York, 1964. 147 pp. Illus. $3.75.

10 JULY 1964 215

I.-

Gbc %& Is0

/us for being, azy!||(and using the EC 470 Vertical Gel Electrophoresis Apparatus)

RAPHsamples on a single acrylamide get-Reproducible and Intercomparable.

WORKING TIME = 10 MINUTES

Whether you are lazy or not, you wvill enjoy saving up to twohours daily conducting electrophoresis research. Using theEC 470 Apparatus, here is how it is done:1. Cell locks itself together no furthei manipulation2. Pour in sintgle gel solution no further manipulation3. Apply samples directly-no further imianipulation

After running for one hour, remove gel slob.4. Stain together, destain together, and evaluate together.

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216

AAAS

Symposium Volume

SYSTEMS OF UNITS-NATIONAL ANDINTERNATIONAL ASPECTS

Edited by Carl F. Kayan

A look at the growing problemsin the conflict between interna-tional usages and our own nationalsystem of units. This volume con-siders them both subjectively andobjectively in order to alert thetechnologist to the clamor, needs,and proposals to ameliorate theconfusion of measurement. .$6.75AAAS members discount price, $5.75

Order from

AMERICAN ASSOCIATION FOR THEADVANCEMENT OF SCIENCERoom 1031515 Massachusetts Ave., NWWashington, D. C. 20005

INDEX TOADVERTISERS

10 July 1964Ace Glass Inc i............ 105

Ainsworth, Wm., & Sons, Inc...... 107

Air Products and Chemicals Inc. .....199American Edelstaal, Inc ....... 195ANS, Inc ............. 92

Baird-Atomic, Inc 94

Bausch & Lomb Inc 189

Beckman Instruments, Inc., Scientificand Process Instruments Div. 110, 111

Blickman, S., Inc .......... 208

Borden Chemical Co ......... 210

Brush Instruments ............... 86Chemical Rubber Co ........ 200

Consolidated Electrodynamics ..... 196Cooke, Troughton & Simms, Inc. 196Coors Porcelain Co. .............. 212

Denominator Co., Inc. ............ 198

Dimco-Gray Co. ................. 209

Durrum Instrument Corp. ......... 211

E-C Apparatus Corp. ......... 209, 216

Edmund Scientific Co. ............ 191

Elgeet Optical Co., Inc. ........... 90

Falcon Plastics, Div. ofB-D Laboratories, Inc. ......... 214

Four Continent Book Corp ....... . 194

Gilford Instrument Laboratories, Inc. 195Glas-Col Apparatus Co 113

Hacker, William J., & Co., Inc. 204

Hamilton Co . ................... 95

High Voltage Engineering Corp .. .... 114

Honeywell Photographic Products,Denver Div. .................. 200

Instrumentation Specialties Co. 198

Instruments for Research and Industry 211International Equipment Co. ....... 93

Jarrell-Ash Co. .................. 96

Klett Manufacturing Co., Inc. ...... 213

LaPine Scientific Co. 194

London Co.. 102

Maryland Plastics Inc 213

Matheson ........................ 203Mechanical Enterprises, Inc 210

Millipore Filter Corp.. 194

Nalge Co., Inc . .................. 208

New Brunswick Scientific Co., Inc. .. 209Nuclear-Chicago Corp ........ 220

Nuclear Data, Inc .......... 101

Ohaus Scale Corp .......... 219

Pennsylvania Fluorocarbon, Inc. 192

Perkin-Elmer Corp. ........... 99, 215

Pharmacia Fine Chemicals Inc .... 97

Phipps & Bird, Inc. 217

Photovolt Corp. .215Pilot Chemicals, Inc ......... 196

Pioneer Plastics, Inc ......... 216

Polaroid Corp. 108

Pyrodyne, Inc. 198

Sage Instuments, Inc. 214

Savant Instruments, Inc ....... 213

Scientific Industries Inc ....... 193

Sigmamotor, Inc. 198

Sorvall, Ivan, Inc................. 100

Standard Scientific Supply Corp. 210Statham Instruments, Inc 188

Technical Measurements Corp. 116

Technicon Chromatography Corp .. 91Texas Instruments Inc. 205

Tektronix, Inc. .................. 190

Thermolyne Corp. ............... 212

Thermoplastic Processes, Inc. ...... 204

Tracerlab ........................ 191U.S. Stoneware .................. 188Varian Associates, Recorder Div.-... 106

White, S. S., Industrial Airbrasive .. 197Wilmot Castle Co 87

Yellow Springs Instrument Co., Inc. . 192Zeiss, Carl, Inc . ................. 206

SCIENCE, VOL. 145

fO