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W. B. SAUNDERS COMPANYWest Washington Square

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Texts Gladly Sent to Teacherson Approval

Leeson and Leeson-HistologyBy C. ROLAND LEESON, M.D., The University of MissouriSchool of Medicine, and THOMAS S. LEESON, M.D., Uni-versity of Alberta, Faculty of Medicine.

NEW! The authors of this book have tailored it to the needsof the student or reader who is seeking solid understanding offundamental human histology, but does not have the time tosort through the vast amount of minute detail in an encyclopedictext. In the first part of this two-part text, the auhors cover thecell, cellular environment, the four primary tissues and theirspecialization. The second part of the book is devoted to cleardescription of the histology of the organ systems. Profuseillustrations enrich the book's effectiveness.492 pages * 453 illustrations * $8.00 * New-Published July, 19661

Orr-Vertebrate BiologyBy ROBERT T. ORR, Ph.D., California Academy of Sciences,San Francisco.

NEW (2nd) EDITION! Beautifully illustrated, this text presentsa fascinating picture of the characteristics and way of life ofNorth American and South American vertebrates. Anatomicalarrangements and functional systems of representative verte-brates in each group are vividly described . . . skeletal, muscular,digestive, respiratory, urogenital, sensory, endocrine. In thiscareful revision, chapters on anatomy and behavior have beenenlarged, while new sections have been added on the effects ofisolation on speciation, the rate of evolution, interspecific com-petition, and numerical taxonomy.483 pages * Illustrated * $8.00 ' New (2nd) Edition-Published Sept., 19661

Florey-Introduction to General& Comparative Animal Physiology

By ERNST FLOREY, Ph.D., University of WashingtonNEW! Here is an introductory text covering the important terms,concepts, and theories of modern animal physiology. Equaltreatment is given to mammalian and non-mammalian physiol-ogy, and the comparative point of view prevails throughout.Each physiological topic presented is preceded by helpful chap-ters on dynamics, energetics, and kinetics. A separate chapterin the book is devoted to certain aspects of bioelectricity andserves as a preparation for chapters on nerve and musclephysiology. New information is included on synaptic transmis-sion, neurosecretion, and neurochemistry.713 pages * 480 pages * $10.00 * New-Published July, 19661

Turner-General EndocrinologyBy C. DONNELL TURNER, Ph.D., Duquesne UniversityNEW (4th) EDITION! In this thorough revision, the authorpresents endocrinology on a truly biological level, incorporatingsignificant material from recent literature on the subject. Thecentral theme of this revision is the reciprocal interrelationshipof the nervous and endocrine systems. Dr. Turner draws nosharp line between these two coordinatory systems. He considersthem as an entity-the neuro-endocrine system. In keepingwith this thesis, more space has been devoted to the problem ofhow hormones act upon the central nervous system to determineand condition reproductive behavior. Two new chapters havebeen added on the pituitary gland.580 pages * Illustrated * $10.00 * New (4th) Edition-Published April, 19661

t (I18 NOVEMBER 1966 815

,I _ L18 NOVEMBER 1966 815

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SCIENCE, VOL 154818

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If the examiner asks only questionsjotted down in advance and allows thecandidate to talk himself out in re-ply, then the exam might better havebeen written. Should the candidateeither flounder or quickly demonstratemastery, it may be best to probe else-where by politely interrupting with adifferent question. If one long struggleuses up most of the time allotted toa field, then, to compensate, short ans-wers can be requested to a series ofshort questions. It is important. partic-ularly with a marginal performance.that enough questions be asked to pro-vide adequate sampling. If one exam-iner explores methods, or history, orrelevant literature, another can turnto a different approach. Let us takeadvantage of the adaptability of theoral examination for making the mostof time, achieving balance, findingstrength and weakness, and assuringvalidity of the final judgment.Some examiners allow candidates

to pad answers against the chill offresh questions. Some permit near ans-wers to count as hits. Some feed ans-wers or ask questions that can hard-ly be missed. ("What have you readlately? Tell us about it.") Some canbe counted on to ask certain ques-tions well known to the underground.Others require only an acquaintancewith notes of their own courses. Adifficult candidate for all examiners isthe one who thinks and speaks slowly;he may require a second sitting to cov-er the material adequately. Let usmaintain reasonable control of thepace, precision, and uniqueness ofeach examination, refusing to let games-manship substitute for scholarship.Most examiners pass the test, many

with distinction, yet low marks are toofrequent to ignore. Let us make theeffort to do our best.

MILTON HILDEBRANDDeparttlmentt of Zoology, University ofCaliforniia, Davis, 95616

Shrouds Around LSD

After my summer of one-way cor-respondence and long-distance calls,Dahlberg's letter (30 Sept.) regardingconitin Lied research with LSD was en-Couraging. Unfortunately, I have notbeen so lucky (for luck it must be?the logic eludes me), in obtainingLSD for research purposes. Last springI designed an experiment to measureobjective behavioral and performance

changes under the influence of LSD-25. With LSD fantasies running ram-pant, it seemed that a few facts wouldbe useful. I hired a research assistant(on nonfederal fLinds) and we wereabout to start the project. Then camethe send-it(LSD)-all-back-to-Sandoz let-ter. I objected, they commiserated,I sent it back. With the LSD wentmy approval to use the drug sincethis had been filed previously bySandoz. They indicated that I shouldwrite to NIMH. Delayed but not dis-couraged, since I had formerly re-ceived an NIMH grant for LSD re-search from which resulted a bookand several papers, I sent the proposalto them. I asked for approval and asmall supply of the drug but not forfunds. (Was this my error?) No replyfor I month so I phoned-of coursea comnmittee had to meet, a stupidoversight on my part. It met and ap-proved the proposal if I would changeone step. Gladly, for it was a wiserecommendation. Another month wentby, no letter, no drug, so I phonedagain. The committee had to meetagain. (Will I never learn?) Eventually,uipon phoning again, I learned that Idid have the NIMH Committee's ap-proval but I had to have someone inthe Food and Drug Administration ap-prove the distribution of the drug. I hadspoken to only four different indi-viduals at NIMH, but after speakingto five at the Food and Drug Admin-istration, I despaired and hoped thatmy correspondence would eventuallyfilter through to the appropriate per-son. The summer passed, the researchassistant worked on his thesis, and Iran up a phone bill.

Contrary to Dahlberg's experience,the small amount of lISD research thatwe have undertaken in this researchcenter has not gained me the reputa-tion of being a "kook" but I havenever been too sensitive to the criti-cisms of others whose pursuit of aquiet life is an excuse for being in-effectual. I have had the encourage-ment of the director of this instituteand the chairman of the department ofpsychiatry, notwithstanding the obvi-ous jeopardy of research with such acontroversial agent as this.

I wish I could end this letter withthe same phrase that Dahlberg used-that the work on LSD is proceedingas planned. Here it is not.

JOHN C. POLLARDDepartment of Psychiatry,University of Michigan,Anntz Arbor 48104

SCIENCE, VOL. 154

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These three-channel systems attain an E2/B of betterthan 100 with no refrigeration. The degree of quenching isaccurately determined by external-ratio standardization, andthe entire system is easily calibrated with the adjustmentof only one control. They also feature a Command TowerProgrammerTm which allows the personal selection of sam-

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Fur, Lice, and History

In his contribution to the discussionon the evolution of hairlessness inman, Olson (Letters, 22 July, p. 364)suggests that disease-causing agentstransmitted by ectoparasitic vectorsmay have selectively "wiped out theentire fUr-bearing segnlemet of the hu-nman popuLlation" becauLse the nonhairymembers of the population probablytook great pains to rid themselves"of body lice and ticks (the latter, bythe way, are not insects) Awhile their"furry cousins probablv never coulddelouLse or detick themselves." Thereare several lines of evidence derivedfrom studies of modern hunter-gather-ers and nonhumain primlates x hich, innmy opinion, miake Olson's imaginativeproposal untenable or at lea.st imlprob-able.There is, fir.st, the nmatter of aroom-

ing. Modern fur-hearing primates,wxith few exceptions (for examiple. thespider monkeys), are efflicient delouLsersand detickers. Records f'or fleas, lice,and ticks on apes aInd monkeys, re-gardless of their state of arboreal orterrestrial adaptation, are rare for mostspecies and extremely rare for speciesthat indulge in mutual groonming activ-ities. Fur-bearing primates are no lessadept than hairless men in rem-novingectoparasitic visitors. Presumablyr thiswas also true for early, hairy homi-nids.

Second, man may actuAlly have in-creased his ectoparasite burden, ancdthe potentiall for tralnsmnission of dis-ease-caLsing agents. hx providcing-palrticularIv for lice al rich array ofclothing microhabitatltS aLS a SLbhStituLtCfor- hody halir. and bx providing-forother arthropod par.asites which clo notreClaillnil on the mammalian host con-tinLiLoslx aMn elaborate inest (the shel-ter. cav e. or hou.e . Frla presumiablvhairv, hominidcls probably harbored onevarietV of the louLse. Pedicitlushumlam/l(r , wvhich roa.mecd throuLgh thehair l'fo-ests of aill body surfaces. To-day man harboors tvo0 varieties, onealdalpted palrticUlarlv to life on thescalp, the other to the body and toclothing where the eggs are depositedi.

Thircl. all available data suLggestthat vector-borne epidemic diseasescapable of 'wiping out" segments ofhumian populations mtLst have been ex-ceedingly rare prior to the develop-ment of agriculture and urban waysof life, with consequent increases inhuman population density and disrup-tion of the natural environment. Hunt-

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SCIENCE, VOL. 154

er-gatherer population units are neces-sarily small and geographically dis-persed; furthermore, these populationsfunction (or have until recently) inrelatively stable ecosystems. Vectorsand infectiouls and parasitic agents ofdisease are also components of suchsystems. In the stable situation, trans-mission of autochthonous agents, es-pecially by ectoparasites, is sporadicand focal-the diseases are endemic.New human suLsceptibles, appearing onthe scene infrequently as newborns oriMiigrants, will die sporadically. or sur-vive as relative or absolute immunes.Epidemics undoubtedly occurredanong the early hominids, as they do(rarely) among the modern hunter-gatherers and primates in undisturbedsettings, buLt the majority of theseepidemics must have been caused byagents transsmitted by unspecialized,direct, respiratory and contaminativeroLutes. Only agents of this kind canreadily be introduced from outsideinto a stable ecosystem and a whollysusceptible population. Epidemicscaaused by vector-borne agents musthave been rare, as is true among thenmodern primates and hunter-gather-ers, and within the vector-borne group,epidemics due to transmission by ecto-parasites must have been extremelyrare.

FREDERICK L. DUNNInstitute for) Medical Research,Univiersity of California ICMR TProgram, Koalak Liumpur. Malay via

Gerontocracv

In Science ( 1 2 AuLg. p. 723) it isreported, as it was too in the dailypress, that the Fermi award for 1966will be shared by three venerable nu-clear scientists. It is not to belittle theimmense merit of these scientists, butone cannot help being struck by theage of the happy laureates: respective-ly 87. 87, and 64, average: 79. 1 feelit is a pity to distribute such importantawards to people already covered withhonor, respect, and consideration whenso many valuable young scientists awaitin vain any recognition of their ef-forts. I thought up to now that"gerontocracy" was the privilege of ourold European civilizations. This eventmakes me change somewhat myopinion.

MICHEL PRIVAT DE GARILHE11, rute Roger-BaconParis 1 7'(, Fratnce18 NOVEMBER 1966

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SCIENCE, VOL. 154

descriptions of timber. The poor photo-graphs, typographical errors, and tax-onomic mis-takes are still present.The text consists of an introduction

describing the growth and anatomy ofthe wood, the nomenclature applied totrees, and a glossary of terms used ingross descriptions of timber. Followingare 244 alphabetically arranged de-scriptions of timbers, all seeminglyculled from personal communcationsand outdated literature, if the bibliog-raphy can be taken as an indication.Among the anomalies are descrip-

tions of the same species of timberunder two different common names indifferent portions of the volume; forexample, the timber of Hymenea cour-baril is discussed as both courbaril andWest Indian locust, and that of Pinussylvestris as both Scot's pine and Bal-tic redwood. The timbers of Larixamericana and Larix laricina are men-tioned separately, although the twonames are synonymous. As before,treatments of timbers are uneven, andinformation given for some species isnot given for others.

WILLIAM L. STERN1907 Lyttonsville Road,Silver Spring, Maryland

Cosmic Radiation

Volumes of proceedings are usuallynot noted for their readability. In thisrespect the Proceedings of the NinthInternational Conference on CosmicRays (Institute of Physics and thePhysical Society, London, 1966. 2 vols.149 pp., illus. £10 1Os.) is not much

different from most conference pro-ceedings. However, unlike most, it isnot already outdated at publication, andit is also very well edited. Probably be-cause the conference was well attendedby most of the leading scientists inthe field, the proceedings represent verywell the status of our knowledge aboutthe cosmic radiation.The first volume includes all the

papers dealing with the spectral andisotopic composition and the geophysi-cal effects of the particles. There arealso 18 more or less theoretical paperson the acceleration of cosmic rays andthe relationships between the chargedcomponent, both nuclear and electronic,and the electromagnetic component.There are not yet enough experimentaldata to aid (or limit) theoretical astro-physicists in their choice of acce'era-tion models. Fifty-five papers in the

878

volume deal with the modulation ofthe intensity of the primary particles.On this question there is a growingbody of good data which already hasled to some insight into the mechanismsthat cause the variations in the inten-sities of the cosmic radiation.The first section of volume 1 consists

of 12 generally very good invited pa-pers by leading workers in the fieldcovering such topics as magnetic fieldsin interplanetary space, modulation, ori-gin of cosmic rays, and x-ray andgamma-ray astronomy. These paperswould be extremely useful to students.They are, in general, well indexed.In addition, there are three rapporteurpapers summarizing modulation, spec-tral composition, and magnetosphericphenomena.Volume 2 deals with extensive air

showers, high-energy interactions, andmuons and neutrinos. Two invited pa-pers summarize these fields, and threerapporteur papers summarize the con-ference reports on these topics.Some of the most interesting papers

on extensive air showers were thosereporting new techniques for learningabout primary particles of very greatenergy. Several of these papers dealwith the detection of extensive airshowers by radio techniques. Cores ofextensive air showers are being studiedwith a neon hodoscope by a group atKiel. It is hoped that a large airshower can be detected by its scintilla-tion in the atmosphere. Several experi-ments using larger arrays of variousdetectors to extend measurements tohigher energies were described.

Progress in the study of high energyphysics with cosmic ray particles hasbeen slow. Many new data are pre-sented in the papers, but most of thedata are difficult to interpret.Two papers reported results of

cosmic ray neutrino experiments per-formed in the Kolar Gold Field inIndia and in a South African goldmine. Both gave preliminary data ofpoor statistical weight.The amount of material in these

encyclopedic volumes is overwhelming;there is no doubt that they should beon the shelves of all cosmic ray phys-icists and in the libraries of physicsdepartments doing research in any ofthese fields. They provide an excellentsummary of the efforts of scientists onplanet Earth to study the phenomenacalled cosmic rays.

PHYLLIS S. FREIERSchool of Physics and Astronomy,University of Minnesota, Minneapolis

New Books

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The Economics of Poverty. Alan B.Batchelder. Wiley, New York, 1966. 232pp. Illus. $4.95. Introduction to EconomicsSeries.The Educated Society. Daniel Jenkins.

Faber and Faber, London, 1966. 256 pp.28s.

Experimental Foundations of Rors-chach's Test. Ernest G. Schachtel. BasicBooks, New York, 1966. 352 pp. $7.95.

Field Guide for a Study of Socializa-tion. John W. M. Whiting et al. Wiley,New York, 1966. 192 pp. Illus. Paper,$2.95. Six Cultures Series, vol. 1.The Genesis of Language: A Psycho-

linguistic Approach. Proceedings of a con-ference on "Language Development inChildren" (Old Point Comfort, Va.), April1965. Sponsored by the Human Com-munication Program, National Instituteof Child Health and Human Development.Frank Smith and George A. Miller, Eds.M.I.T. Press, Cambridge, Mass., 1966.414 pp. Illus. $10. There are 14papers.

International Aid. A discussion of theflow of public resources from rich to poorcountries. I. M. D. Little and J. M. Clif-ford. Allen and Unwin, London, 1965;Aldine, Chicago, 1966. 302 pp. $7.50.

Invention and Economic Growth. JacobSchmookler. Harvard Univ. Press, Cam-bridge, Mass., 1966. 350 pp. Illus. $9.95.

Psychology in Community Settings:Clinical, Educational, Vocational, SocialAspects. Seymour B. Sarason, MurrayLevine, I. Ira Goldenberg, Dennis L.C{herlin, and Edward M. Bennett. Wiley,New York, 1966. 726 pp. $12.95.The Savage Mind. Claude Levi-Strauss.

Translated from the French edition (Paris,1962). Univ. of Chicago Press, Chicago,1966. 302 pp. Illus. $5.95. The Nature ofHuman Society Series.The Searchers: Conflict and Communism

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Self-Evaluation: Concepts and Studies.James C. Diggory. Wiley, New York,1966. 491 pp. Illus. $9.95.Signal Detection Theory and Psycho-

physics. David M. Green and John A.Swets. Wiley, New York, 1966. 467 pp.Illus. $12.95.

Social Indicators. Raymond A. Bauer,Ed. M.I.T. Press, Cambridge, Mass., 1966.379 pp. Illus. $10. Technology, Space, andSociety Series. Five papers.

Social Problems:.A Modern Approach.Howard S. Becker, Ed. Wiley, New York,1966. 780 pp. $8.95. There are 14 papers.

Studies in Social Change. Amitai Etzioni.Holt, Rinehart, and Winston, New York,1966. 240 pp. Paper, $3.95.

Testing Problems in Perspective. Twen-ty-fifth anniversary volume of topicalreadings from the Invitational Conferenceon Testing Problems. Anne Anastasi, Ed.American Council on Education, Washing-ton, D.C., 1966. 685 pp. Illus. $10. Thereare 58 papers which were given at con-ferences that were held between 1947 and1964.

(Continued on page 930)

SCIENCE, VOL. 154

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out priorities for scientific research anddevelopment.The Soviet Communist Party Pro-

gram and directives were, quite nat-urally, adopted in due course byCzechoslovakia and other Bloc coun-tries. By now, they all have preparedtheir so-called "perspective" planningof scientific development to the year1970. This is an interesting experimentwhich accords with the policies formu-lated at the Congress and with Partydecisions. Teams of scientists, techni-cians, and economists are asked toevaluate the feasibility of directing re-search and development toward spe-cific scientific and technological objec-tives in terms of available human, ma-terial, and financial resources.As our own government concern

with, and expenditures for, scientificactivity grow, the responsible agenciesmay find it worthwhile to follow at-tentively the course of Czechoslovakscience in the coming years.

M. RECHCIGL, JR.

Forthcoming Events

December

19-20. British Biophysical Soc., wintermtg., London, England. (W. Gratzer, Bio-physics Dept., King's College, 26 DruryLane, London W.C.2)

19-21. Acceleration Biology, Sunnyvale,Calif. (Univ. of California Extension,Berkeley 94720)

26-31. American Assoc. for the Ad-vancement of Science, annual, Washing-ton, D.C. (R. L. Taylor, AAAS, 1515Massachusetts Ave., N.W., Washington,D.C. 20005)

In addition to the 20 sections of theAssociation and five AAAS committees,the following organizations have arrangedsessions at the AAAS annual meeting 26-31 December in Washington, D.C.

MathematicsAmerican Mathematical Soc. (E. Pitch-

er, Lehigh Univ., Bethlehem, Pa.)Association for Computing Machinery

(D. Leiti, Heliodyne Corp., Rosslyn, Va.)National Council of Teachers of Math-

ematics (J. Gates, 1201 16 St., NW, Wash-ington, D.C.)

Society for Industrial and AppliedMathematics (J. H. Griesmer, I.B.M., T.J. Watson Research Center, YorktownHeights, N.Y.)

PhysicsAmerican Astronautical Soc. (S. F.

Singer, Univ. of Miami, Coral Gables,Fla.)American Meteorological Soc. (J. E.

Masterson, Natl. Center for AtmosphericResearch, Greenbelt, Md.)

Harvard Project Physics (F. J. Ruther-ford, Harvard Univ., Cambridge, Mass.)

MEASURESPECTRALDISTRIHUTION

AND INTENSITYOF LIGHT

SOURCESIN * PLANT GROWTH ROOMS, FIELDS

* INDUSTRIAL LABORATORIES

ISCO's Model SR Spectroradiometer uses a unique wedge-interference filter system which enables the entirespectrum from 380 to 1050 nm (mu) to be continuouslyscanned by simply turning a knob. This system elimi-

nates filter changing and preselected wavelength in-

crements which obscure narrow wavelength peaks.

Ranges of either 380 to 750 nm or 380 to 1050 nm are

available. The first range is well adapted for colori-.metry and calculation of tristimulus color yalues; the

broader range is recommended for the study of the

photochemical effect of light on biological systems.

Other highly desirable features include true cosine

response, 8 full scale sensitivity ranges, direct readingin spectral intensity units, chopped beam optical system,and a fiber optic extension head. All readings are trace-

able to the National Bureau of Standards or NationalResearch Council. The Spectroradiometer is equippedfor both line and battery operation and is completelyportable. An accessory line or battery operated auto-

matic recorder will plot a continuous spectral distribu-tion versus light intensity curve at preselected times.

For further information, please request Brochure SR37K.

INSTRUMENTATION SPECIALITIES COMPANY, INC.

5624 SEWARD AVE. * CABLE ADDRESS: ISCOLAB LINCOLNLINCOLN, NEBRASKA 68507, U.S.A. * PHONE (402) 434-8265

SCIENCE, VOL. 154

!'MPMOU Because/MA# Mm Auto-Filter is

not dependentupon aspi-rator pumpsor steampressure,continuousfeeding ofsolution ispossible.

The solution is introduced intothe Auto-Filter at a controllablerate, from a separatory funnel.A ceramic drum, lined with filterpaper, revolves at an operator--selected speed. The fluid isforced through the filter paperand drum perforations, througha spout into a collecting vessel.The residue is retained on theremovable filter paper.

For filtration requiring elevatedtemperatures, an accessory in-tegral heating unit is available.All Auto-Filter units are supplied,ready for 115 volt, 60 cycle use,with on-off toggle switch, step-less speed control, pilot light,chrome-plated support rod.Pre-cut filter papers are avail-able in three grades coveringan extremely wide range ofrequirements.C.R.C. Auto-Filter

No. S-84 $187.50Auxiliary Heater

No. S-85 $ 34.50Pre-Cut Filter Paper Strips

S-86, specify type: TypeA, coarse; Type B, coarseextra strength; Type C,fine; per thousand --$7.75

%..-.m 1-.1 nowsor,

Chemistry

American Assoc. of Clinical Chemists(R. S. Melville, Natl. Inst. of GeneralMedical Sciences, NIH, Bethesda, Md.20014)

Geology and Geography

Association of American Geographers,Middle Atlantic Div. (D. J. Patton, Carne-gie Inst. of Washington, Washington,D.C.)

National Geographic Soc. (R. Gray,The Society, Washington, D.C.)

National Speleological Soc. (W. B.White, Pennsylvania State Univ., Univer-sity Park)

Zoological Sciences

American Fisheries Soc. (R. F. Hutton,The Society, Washington, D.C.)

American Soc. of Zoologists (L. E.DeLanney, Ithaca College, Ithaca, N.Y.)Animal Behavior Soc. (E. M. Banks,

Univ. of Illinois, Urbana)Herpetologists' League (J. E. Huheey,

Dept. of Chemistry. Univ. of Maryland,College Park)

Society of Systematic Zoology (R. P.Higgins, Wake Forest College, WinstonSalem, N.C.)

Zoological and Botanical Sciences

American Soc. of Naturalists (R. D.Hotchkiss, Rockefeller Univ., New York,N.Y.)

Association of Southeastern Biologists(E. Quarterman, Vanderbilt Univ., Nash-ville, Tenn.)

Beta Beta Beta Biological Soc. (Mrs.F. G. Brooks, Box 515 Ansonia Sta., NewYork, N.Y.)

Ecological Soc. of America (C. D.Monk, Laboratory of Radiation Biology,Bldg. 772-G, Aiken, S.C.)

Society for the StuLdy of Evolution (E.C. Olson, Univ. of Chicago, Chicago,Ill.)

Psychology

American Speech and Hearing Assoc.(E. D. SchuLbert, Stanford Univ., PaloAlto, Calif.)

Social and Economic Sciences

American Economic Assoc. (H. F. Wil-liabmson, Northwestern Univ., Evanston,111.)American Po'litical Science Assoc. (G.

NI. Lyons, Natl. Acad. of Sciences, Wash-ington, D.C.)American Soc. of Criminology (D. E.

J. MacNamara, City Univ. of New York,New York)American Sociological Assoc. (J. A.

Beegle, Michigan State Univ., East Lan-sing)

Metric Assoc. (R. P. Fischelis, Collegeof Pharmacy, Ohio Northern Univ., Ada)

National Inst. of Social and BehavioralScience (D. P. Ray, The Institute, Wash-ington, D.C.)

Society for the Scientific Study of Reli-gion (H. L. Silverman, Seton Hall Univ.,South Orange, N.J.)

History and Philosophy of Science

History of Science Soc. (B. S. Finn,Museum of History and Technology,Smithsonian Inst., Washington, D.C.)

18 NOVEMBER 1966

YOU'D ALMOST THINK IT RAINED INSIDE

THE REXYNTM BOTTLE, TOO It's wet in there. That'sbecause Fisher's Rexyn ion exchange resins are packaged wet, ready to

use. Dry ion exchangers must be slurried in distilled or deionized water for

proper conditioning prior to use. The beads may fracture, reducing their

effectiveness . . . but not with Rexyn! We do the slurrying by a carefullycontrolled procedure, and make sure of uniform particle size by direct

inspection with microscopes and calibrated verniers, rather than by the

less precise sieve method. And the purity of Rexyn resins is certified, with

low metallic content assured by atomic absorption analyses. Three gradesare available. Research Grade gives you highest purity and regenerationefficiency in ultrasensitive analytical and research techniques. Chromato-

graphic Grade provides excellent resolution and sharp, clear chromato-

graphic separations. Analytical Grade is Fisher's economical ion exchangerfor routine analytical use. Most Rexyn exchangers come in all three grades.For a handy chart with complete specifications, write Fisher Scientific

Company, 1 39 Fisher Building, Pittsburgh, Pa. 15219. J-539

F FISHER SCIENTIFIC CO.Instruments, Apparatus, Furniture and Chemicals for Laboratories

Complete stocks in all these locations: Atlanta * Boston * Chicago - Cleveland - Houston * New YorkPhiladelphia * Pittsburgh * St. Louis * Union, N. J. * Washington * Edmonton * Montreal * Toronto * Vancouver

927

For the chemist

who's been burned

once too often

The Mallinckrodt AR Plastic reagent dispenser. Squeezethe bulb and get a steady flow of acid or other reagent.

Press the valve on top for an immediate, drip-free stop.

Eliminates pouring, spills and burns.

WE ALSO MAKE THE MEASURE-MATIC AUTOMATIC DISPENSERSSet the cup on top for any desired volumethen squeeze out uniform shots of reagent,

one right after the other.

Add several of these dispensers to your

next order of unbreakable AR labware.They can save your skin!

Mallinckrodtcko[iMALLINCKRODT CHEMICAL WORKSST. LOUIS * NEW YORK v LOS ANGELES

928

Science Courses for BaccalaureateEducation Project (V. L. Parsegian, Rens-selaer Polytechnic Inst., Troy, N.Y.)

Society for General Systems Research(R. F. Ericson, George Washington Univ.,Washington, D.C.)

Society for the History of Technology(R. Sanders, Industrial College of theArmed Forces, Washington, D. C.)

Medical Sciences

Alpha Epsilon Delta (M. L. Moore, TheSociety, Bronxville, N.Y.)American Acad. of Psychoanalysis (E.

A. Weinstein, Washington School ofPsychiatry, Washington, D.C.)

American Assoc. of Bioanalysts (M. M.Cohen, 165-25 Hillside Ave., Jamaica,N.Y.)

American Physiological Soc. (F. Hal-berg, Univ. of Minnesota, Minneapolis)

American Psychiatric Assoc. (J. 0. Cole,Natl. Inst. of Mental Health, NIH,Bethesda, Md.)

EducationAAAS Commission on Science Educa-

tion (J. R. Mayor, AAAS, Washington,D.C.)

American Nature Study Soc. (D. E.Wade, 106 Depot St., Oregon, 111.)

Cooperative Committee (E. Will, StateCollege of New York, Oneonta)

Educational Policies Commission (J.E. Russell, The Commission, Natl. Educa-tion Assoc., Washington, D.C.)

National Assoc. of Biology Teachers(W. Stephenson, Earlham College, Rich-mond, Ind.)

National Science Teachers Assoc. (A.F. Eiss, NSTA, Washington, D.C.)

Pennsylvania Science Teachers Assoc.(D. Ulmer, Lock Haven State College,Lock Haven, Pa.)

Science Teaching Soc. CoordinatedProgram (A. F. Eiss, Natl. Science Teach-ers Assoc., Washington, D.C.)

Information and CommunicationNational Assoc. of Science Writers (L.

Zahn, Hill and Knowlton, Inc., 150 E.42 St., New York, N.Y.)

Society of Technical Writers and Pub-lishers (I. D. Welt, School of Govern-ment, American Univ., Washington, D.C.)

Biometric Soc. ENAR (D. S. Robson,Dept. of Plant Breeding, Cornell Univ.,Ithaca, N.Y.)

Science in GeneralAcademy Conference (K. Reiss, Tulane

Univ., New Orleans, La.)Scientific Research Soc. of America (D.

B. Prentice, The Society, 51 Prospect St.,New Haven, Conn.)

Society of the Signa Xi (T. T. Holme,51 Prospect St., New Haven, Conn.)

Washington Acad. of Sciences (J. K.Taylor, The Academy, Washington, D.C.)

Wildlife Soc. (J. L. Buckley, U.S. Dept.of the Interior, Washington, D.C.)

2 7-30. American Astronomical Soc.,123rd mtg., University of California, LosAngeles, (G. C. McVittie, The Society,Univ. of Illinois Observatory, Urbana)

28-30. Econometric Soc., winter mtg.,San Francisco, Calif. (Box 1264, YaleStation, New Haven, Conn.)

SCIENCE, VOL. 154