17-19. American Acad. of OccupationalMedicine, annual, Columbus, Ohio. (G.M. Hemmett, AAOM, Eastman KodakCo., 343 State Street, Rochester 4, N.Y.)

17-19. Solid State Circuits, intern. conf.,Inst. of Electrical and Electronics Engi-neers, Philadelphia, Pa. (R. Emberson,IEEE, Box A. Lenox Hill Station, NewYork, N.Y. 10021)

17-21. American College of Cardiology,annual, Boston, Mass. (Executive Directorof the College, Empire State Btuilding,New York, N.Y. 1000l1)

18-19. Mechanical and TransplantHeart Substitutes, symp., Heart Assoc. ofSoutheastern Pennsylvania, Philadelphia.(I. L. Perry, HASP, 318 S. 19 St., Phila-delphia 19103)

18-20. Skin Bacteria in Infection, symp.,San Francisco, Calif. (Administrative Sec-retary, Div. of Dermatology, Univ. ofCalifornia, San Francisco Medical Center,S,an Francisco 94122 )

9-20. Comparative Psychopathology-Animal and HumLan, annual symp., Amer-ican Psychopathological Assoc., New York,N.Y. (F. J. Kallmann, APA, 722 W. 168St.. New York 10032)

20. Reliability, 6th annutal West Coastsynmp., American Soc. for QuLality Control,Los Angeles, Calif. (A. S. Golant, Rocket-dyne. Canoga Park, Calif.)

20-26. Caribbean Dental Convention,4th annuLal, Port of Spain, Trinidad. (K.Henry, Dental Assoc. of Trinidad andTobago, 109 Frederick St., Port of Spain)

21-22. Chicago Dental Soc./Acad. ofI)entistry for the Handicapped, Chicago,Ill. (R. T. Kirk, Acad. of Dentistry forthe Handicapped, Box 213, Springfield,Ohio)

21-25. Technical Assoc. of the Pulpand Paper InduLstry, 50th annual, NewYork, N.Y. (A. E. Dembitz, TAPPI, 360I exington Ave., New York 10017)

22-26. American Soc. for Metals, west-ern metal and tool exposition and conf.,Los Angeles, Calif. (ASM, Metals Park,Ohio 44073)

22-26. Society for Nondestructive Test-ing, spring convention, Los Angeles, Calif.(SNT. 914 Chicago Ave., Evanston, Ill.60202)

23-24. National Dairy EngineeringConf., East Lansing. Mich. (C. W. Hall,AgricuLltuLral Engineeriing Dept.. MichiganState Univ., East Lansing)

23-25. High Polymer Conf., East Ger-man Chemic'al Soc., Magdebtirg. (EastGerman Chemical Soc.. Unter den Linden68/70. Berlin W.8)

24-26. Biophysical Soc., 9th anntual,San Francisco, Calif. (R. B. Setlow. Bio-physical Soc.. Oak Ridge National Lab-oratory, P.O. Box Y, Oak Ridge. Tenn.3783 1)

24 26. Americtan Crystallographic As-soc., Suffern, N.Y. (W. L. Kehl, ACA,Gulf Research and Developnment Corp.,P.O. Box 2038, PittsbuLrgh. Pa. 1 5231))

24-28. Canadian Assoc. of Radiologists,annall, Toronto. Ontario. (Miss A. I. Ek-strand, CAR. 1555 SuLmmerhill Ave.,Montreal, Canada)

25-26. Society for Information Display,5th natl. convention and symp., SantaMonicla, Calif. (R. E. Bernberg, 591 Tiger-tail Road, I os Angeles, Calif. 90049)15 JANUARY 1965

_ _A_ E_* A '* A 'A3

II A A

For complete details, send for Data File E234-15.

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ThO Zeiss

This electron microscope com-bines high resolving power with

unsurpassed operating simplicity.Preparatory and operating stepshave been greatly automated, al-

lowing you to devote full attention

to the research problem at hand.

With minimum instruction, labora-tory technicians can produce out-

standing results.

0

RESOLUTION of 10-12A is obtainable.

DIRECT MAGNIFICATION ranges from.1,500x to 40,000x in four fixed and cali-brated steps, or continuously. Additionalpole pieces for lower magnifications alsoare available.

FAST BEAM ALIGNMENT: The beam is

aligned electromagnetically rather thanby tilting or displacing the gun.

UNIQUE BRIGHTNESS CONTROL: Ex-

clusive with Zeiss. The electron beamoscillates at 90 KC across the diaphragmopening. Image brightness is adjusted bychanging the amplitude of oscillation,not the beam current.

LOW CONTAMINATION RATE: Due toexclusive design features specimen con-

tamination is unusually low.

CHANGING APERTURES is donequickly and easily, without breakingvacuum. Three objective apertures are

available inside the column.

ELECTROSTATIC STIGMATOR is

newly designed for unusually easy com-pensation of astigmatism

FOCUSING is continuous, with numeri-cal read-out indicator.

SELECTED AREA DIFFRACTION:Specimen areas of 1-2,u diameter can beselected for examination.

CONVENIENT OBSERVATION: Forgroups, a 41/2-inch diameter fluorescentscreen observable through three largewindows; for individuals, a lOx binocu-lar of exceptionally high light transmit-tance equipped with special eyepiecesfor eyeglass wearers.

FULLY AUTOMATIC PHOTOGRAPHY:At the touch of a single lever the auto-matic sheet film camera produces prop-erly exposed, sequentially numbered23/4 x 23/4 inch micrographs. Film trans-port is automatic, thus double exposureis impossible.

STEREO MICROGRAPHY: Specimenmay be tilted for 60 or 120 angle of con-vergence without breaking vacuum.

FOOLPROOF VACUUM SYSTEM:Automatic device, controlled by four in-

terlocked pushbuttons, prevents opera-tion of the filament and high voltage be-fore sufficient vacuum is reached.

FAST SPECIMEN CHANGE: Whenchanging specimens, image-to-imageelapsed time is about 40 seconds, includ-ing 12-15 second pump-out time.

An EM 9 is always on display in our show-rooms for demonstration. Nationwideservice is available. For literature writeto Dept. SC

CARL ZEISS, INC.. The Great Name in Optics444 Fifth Avenue, New York, N. Y. 10018ATLANTA. CHICAGO, LOS ANGELES, SAN FRANCISCO, SEATTLE. WASHINGTON D. C., BOSTON IN CANADA: TORONTO. MONTREAL, WINNIPEG, VANCOUVER

SCIENCE, VOL. 147322

New Products

Suction pump (Fisher model 56, 4by' 5 by 3 in. deep) employs peristalticaction to lift water 1 foot at 1 250ml/min; two motor-driven spring-loadedrollers alternately squeeze a loop ofseamless, gum-rubber tubing which canbe used with most reagents at liquidtemperatures 40°C. Separate housingprotects the motor from tubing rup-ture. Controlled by an on/off switch onthe unit or by a switch on the instru-ment used with it. Designed to emptyflow-through cells in colorimeters; use-ful as a circulating pump for refrac-tometers and polarimeters or for reagenttransfer. Comes with 6 feet of 1/8-inchbore Tygon tubing.-D.J.P. (FisherScientific Co., Dept. S382, 415 FisherBldg., Pittsburgh, Pa. 15219)

Gelman electrophoresis scanner (41x 33 x 18 cm) automatically scanscleared electrophoretic separations andreads absorbed dye intensity; displayedon a large, sensitive meter, the readingcan be plotted on standard graph paper(10 X 10 cm or 20 X 20 in.). Applica-ble to any of the new (most of theavailable) support media, the scannerfunctions on the principle of lighttransmission through a sample strip ofvarying dye intensity; small differencesin dye absorption are magnified by afilter of contrasting color. The beamthen strikes a photoelectric cell whosemeter is calibrated in optical densityunits (odu). Space atop the unit ac-commodates graph paper for immediateplotting. A movable plotting rulecoupled mechanically to the strip-car-rier mechanism facilitates plotting; therule is so coupled that serum migration

The material in this section is prepared bythe following contributing writers:

Denis J. Prager (D.J.P.), Laboratory of Tech-nical Development, National Heart Institute,Bethesda 14, Md. (medical electronics and bio-medical laboratory equipment).Joshua Stern (J.S.), Basic Instrumentation

Section, National Bureau of Standards, Washing-ton 25, D.C. (physics, computing, electronics,and nuclear equipment).The information reported here is obtained

from manufacturers and from other sourcesconsidered to be reliable. Neither Science northe writers assume responsibility for the accu-racy of the information.Address inquiries to the manufacturer, men-

tioning Science and the department number.

15 JANUARY 1965

length is magnified X 2.75 on thegraph. The 50-,ua mirrored-scale meterreads either 0 to 1.5 or 0 to 0.35 odu,with a 0.35 calibration button for meteradjustment. Three standard filters are

mounted in a wheel. Convenient forroutine electrophoretic scanning.-D.J.P. (Gelman Instrument Co., Dept.S375, P.O. Box 1448, Ann Arbor,Mich. 48106)

Research microtome-cryostat (Inter-national model CTR), a complete workstation for all frozen-sectioning proce-

dures, facilitates cutting, staining, andmicroscopic examination of tissue, fromone seat. Provides counter-top space

for a microscope, a power outlet, andample storage for stains, reagents,knives, stock solutions, and brushes. Thestainless steel evaporator chamber (17X 15 X 12 in. deep) is cooled by a

½/3-hp sealed Freon compressor. Tem-perature at the knife blade is maintainedwithin 1 °C over the range -10° to-30°C. Reverse-cycle refrigeration forrapid defrosting of the evaporator.Transparent plastic cover kept free ofcondensation by air flow which stopsautomatically when the cover is opened.Fluorescent chamber illumination. Astandard item is a wedge-profile, 120-mm long microtome knife. The anti-rollplate is accurately adjusted to the knifeedge by micrometer. Access holes foran external-vacuum line for vacuum

freeze-drying within the chamber. Aratchet-wheel accessory permits externaladvancement or retraction of the speci-men-feed mechanism. Outside dimen-sions: 341/8 X 30 X 447/8 inches high.-D.J.P. (International Equipment Co.,Dept. S383, 300 Second Ave., NeedhamHeights, Mass. 02194)

Photometer useful from 500 m1y to2.4 tu through path lengths of 0 to101.6 cm (with adjustable focal length);for applications where conventionalspectrophotometers are inadequate. Inaddition to standard measurements(density, blood oximetry, reflectom-etry), it is useful in determining spec-tral responses of bulk materials,

monitoring thickness of thin film, andremote determination of optical prop-erties of intractable materials. OpticsTechnology model 240 consists of lightsource, detector, preamplifier, amplifier,power supply, and meter. Tungsten lampsource is operated from a regulatedsupply and modulated at 330 cy/sec;it is mounted with an adjustable-focusprojection lens on a mount which has4 deg of freedom and is removable forremote mounting. Detector, similarlymounted, consists of an interference-filter holder, variable iris, objectivelens, lead sulfide detector, and transis-torized detector. The tuned amplifierprovides step and continuously variablegain control and full-scale zero suppres-sion on all ranges. The meter has a 0 to100 scale and is good to + 2 percent.Dynamic range of the instrument is1000:1 in visible spectrum (opticaldensity, 3); 10000:1 in infrared (opticaldensity, 4). Linearity is + 2 percentover any 50: 1 signal change; stabilityis + 2 percent per hour; meter andrange-to-range error is 2 percent of fullscale. The meter signal is availablefrom front panel jacks to drive any100- or 10-mv high-impedance recorder.The high signal-to-noise ratio providedby use of modulated light and tunedamplifier and stabilized electronicsmake the instrument useful for mea-suring transmission, reflection, scatter-ing, and turbidity in difficult applica-tions.-D.J.P. (The Ranney Co.,Dept. S376, 155 Montgomery St.,San Francisco 4, Calif.)

Modular cuvette permits individualor serial measurements of pO2, pC02,and pH under controlled temperatures.It houses a thermostatically controlledwater bath, a heated wash-solution res-ervoir, and waste and wash containers.It accepts interchangeable measurementmodules which can be stacked on eachother to meet almost all measurementneeds. Each module has a cavity for aspecific electrode, a sample chamber atthe end of this cavity, and sample linesleading to and from the chamber. Whenthe modules are arranged for serialmeasurements, the sample is injectedinto the base unit; it flows upward un-der pressure, through the modulesabove, past the measurement sites, outthrough the lid module, and into thewaste bottle. A slight turn of any mod-ule cuts it off from the serial-measure-ment stream, making it available forindividual sampling. With a module soaligned, the sample to be measured isinjected into the inlet port of the mod-

323

Wonder why.Ll _ _ _

Coleman Instruments ineseConsolidated leadersElectrodynamics Inc.l recommendF & M Scientific Matheson GasA-_ .- Mixtures FortoxboroMicroTekMine SafetyAppliances Co.Perkin-Elmer I

InstrumentCalibrating?

HERE ARE 6 REASONS: 1. We start with high purity gases,2. use the best thermodynamic data for partial pressure calculationsto obtain composition accuracy, 3. control temperature to dissipateheat of compression and establish stable, accurate pressure readings,4. obtain good mixture homogeneity before sampling for analysis,5. analyze with best available methods using equipment ranging fromOrsat to Mass Spectrometer, 6. follow up with good service and techni-cal assistance. Prompt service from mixing laboratories at all 5 plants.Write to the nearest plant for Matheson Catalog.

UEast Rutherford, N.J.Plants in Joliet, Ill.; LaPorte, Texas; Newark, Calif.; Morrow, Ga.Matheson of Canada, Whitby, Ont.

324

ule directly below and flows upwardpast the measurement site, through thesample outlet port of the module above,and over to the waste bottle. A set ofpO2, pC02, and pH modules may bestacked for serial blood gas analysis;several pO2 modules may be aligned in-dividually for measuring oxygen tensionof a group of blood samples; or serial-ly and individually aligned modules maybe combined for comparison of venousand arterial readings. Modules rest ona base reservoir which holds preheatedwash solution for flushing sample lines.Heating element, thermostat, and im-peller are permanently mounted. Warmwater (370 ± 0.1°0C) circulates throughthe hollow centers of the modules, en-compassing sample line and measure-ment sites. The minimum sample is 0.3ml for serial sampling; slightly largerfor individual sampling. Standard Luerfittings are used throughout. This cu-vette is the basis of a Beckman BloodGas Analysis system employing theirmodel 160 Physiological Gas Analyzer,which translates electrode signals to di-rect meter readings, and the Potentio-metric Strip-Chart Recorder for con-tinuous, permanent records; individualmodules are designed to accept a spe-cific Beckman electrode which connectsto the Analyzer. Dimensions: 12 by 8by 27 inches high (30.5 by 20.3 by68.5 cm).-D.J.P. (Beckman Instru-ments, Dept. S388, Spinco Div., Stan-ford Industrial Park, Palo Alto, Calif.)

Heating bath is a well-insulatedliquid bath with a removable rackholding 18 test tubes each up to 175x 15 mm. Bath chamber is 13 cm indiameter by 13 cm and holds 1.5 liters;external dimensions, 19 X 23 x 25.4 cm.The 250-watt cycling heater heats thewater bath from 200 to 60°C in 25minutes, and to 100°C in 60 minutes;bath maintains the preset temperaturewithin 1.5°C. Containing a full rack,the bath returns to set temperature in2.5 minutes. Thermostat regulator hasreproducible numerical settings. A dialthermometer calibrated from 00 to100°C (100 divisions) in front showsthe bath temperature at all times. Bathhas a heavy phenolic lid, angled toprevent condensation drip onto thesamples. Both interior and removabletest-tube rack are of anodized alumi-num to prevent electrolysis or corro-sion. Case is insulated with fiber glass;thermometer is sealed into the bathwith 0-rings.-D.J.P. (Fisher Scien-tific Co., Dept. S377, 415 Fisher Bldg.,Pittsburgh, Pa. 15219)

SCIENCE, VOL. 147

BeckmanBendix Corp.-6reenbriar Inst.

FUATHESflN

IPersonnelIPlacementI

Replies to blind ads should be addressedas follows:

Box (give number)SCIENCE1515 Massachusetts Ave., NWWashington, D.C. 20005

{|11111111111111111111|||||POSITlONS WANTED |||||||||||||||||I||11111111tBiochemistry/Nutrition Ph.D., good physiology,some pathology background. Sixty publications.Long teaching/research experience. Glycopro-teins, capillary resistance, mucopolysaccharides,vitamins, mineral metabolism, tissue permeabil-ity. Associate professor level: university, insti-tute. Box 15, SCIENCE. 1/15, 22

Biologist, Ph.D. Academic position. Teachingemphasis: objective reasoning through biologi-cal phenomena. Research interest: metabolicwater, solution, statics relative to temperature.H.H. 4548 Nineteenth, NW, Oklahoma City. X

Cytologist-Histologist, Ph.D. Teaching and re-search experience. Hematology, viral and cyto-genetic research. Prefers academic position. Box574, SCIENCE. 1/15

Economic and Mining Geologist available forpermanent teaching position; 7 years of industrialand 6 years of teaching experience in metallicand nonmetallic mineral deposits, economics ofthe mineral industries, mining and explorationgeology. Ph.D. expected from large miningschool. Box 21, SCIENCE. 1/22, 29

Electron Microscopist. Ph.D. zoology-anatomytraining and experience. Numerous publications.Desires challenging academic position with op-portunities for both teaching and research. Box6, SCIENCE.

Meteorologist M.Sc., 6 years of academic ex-perience. Tropical and polar synoptic experience.Desires challenging position. Prefers foreign lo-cation. Box 19, SCIENCE. X

(a) Pharmacology-Physiology Ph.D., developedhypertension, hemostatic products; available forphermaceutical research appointment. (b)Animal Nutrition Ph.D., physiology minor; 1964graduate; seeks research or academic opportunity.Write Woodward Medical Personnel Bureau, 185North Wabash, Chicago 60601. X

Ph.D. Hydrobiologist, department head of smallmidwestern college, 10 years of teaching ex-perience: general biology, zoology, physiology;some research and publications, recent academicyear of study in biophysics; desires academicposition. Box 20, SCIENCE. X

(a) Ph.D. Zoology, experience includes tissuecultures, histo-chemistry, parasitology, chemo-therapy; academic, industrial background. (b)Ph.D. Physiology and Biochemistry, experience inand prefers research with teaching in biochem-istry, enzymology, radiochemistry, proteins.(c) Ph.D. Endocrinology and Reproductive Physi-ology, strong research background; prefers re-search, teaching. (d) Ph.D. Paleobotany, geol-ogy minor (1964), desires teaching with research.For information please write: Science Service,The Medical Bureau, Inc., 900 North MichiganAvenue, Chicago, Illinois 60611. X

Ph.D. with productive imagination and extensiveexperience-biochemical and clinical researchwith publications; teaching; administration;writing. Seeking institutional research (with orwithout teaching) or industrial position. Box 18,SCIENCE. X

Teacher, biological or agricultural chemistry,Ph.D.; 5 years' experience with some researchactivity in areas of metabolism. Box 12,SCIENCE.

15 JANUARY 1965

.i||||l|ll||l||||||ll|||||t POSITIONS WANTED ||||||||||||

Biologist, Ph.D. Seeks teaching position. Back-ground in microbiology, marine biology, oceanog-raphy; can handle other subject areas. Box 17,SCIENCE. X

Chief Chemist, Ph.D. Seeks position in academicor hospital setting. Oriented toward the lifesciences with experience in clinical chemistry,calcification, nutrition, vitamins, and sterols.Numerous publications, several awards. Demon-strated ability to maintain collateral staff ongrants. Box 14, SCIENCE. 1/15

Ph.D. General Scientist. Background: biophysicalmechanisms. Academic/research experience: physi-ology, parasitology/toxicology, ecology/tempera-ture, and so forth, general education. H. H.,4548 Nineteenth, NW, Oklahoma City. X

111111111111111|POSITIONS OPEN llllllllllllill

International Research and Development Corp.Laboratories, a rapidly expanding independentcompany, has several openings in cardiovascularand general pharmacology, and toxicology at thePh.D., D.V.M., M.S., and B.S. levels. Salarycommensurate with training and experience. Sendconfidential resume to the attention of

Mr. Ed JohnsonInternational Research and Development

Corporation,Mattawan, Michigan

Independent Academic Research: An oppor-tunity to develop your ideas. Spacious newfacilities, limited teaching and academic affili-ation (University of Oklahoma School ofMedicine) are available. Ph.D. in biochemistryor related field required. Rank and salary de-pends on experience. Box 22, SCIENCE.

LABORATORY RESEARCH ASSOCIATEPermanent position in new University ResearchInstitute. Bachelors or Masters Degree with majortraining in virology or microbiology and experi-ence in cell culture and virology. Excellent salary,commensurate with training and experience. Senddetailed resum6 to Institute for Molecular Virol-ogy, St. Louis University School of Medicine,1402 South Grand, St. Louis, Missouri

(a) Microbiologist, supv. 20 in basic infectiousresearch; leading drug mfr; E; $15,000 up. (b)Physiologist, direct 15 in respiratory studies usingcardiovascular techniques; research inst; W;$15,000. (c) Biochemist, direct lab in cardiovas-cular studies; Med. center; E; $15,000. (d) Bio-logical Research Director for veterinary productsmfr; MidW; top salary. (e) Biochemist, supv.clinical lab. at famous univ. cancer researchhosp; E; $11,000 to $13,000. Nationwide positions,all levels. Woodward Med. Pers. Bureau, 185 N.Wabash, Chicago 60601.

Professional Placement Sers ices for 68 Years

Ii

AppliedMathematicians

Operations AnalystsApplied Physicists

Career Appointments

Results

One of the most satisfying as-pects of a professional careerat Booz-Allen Applied Re-search is sharing and contrib-uting to a demonstrable recordof achievement. We're hard-headed enough to believe thatany client who brings a tech-nical problem to us deservesthe best effort we can muster.As our record bears out, it's agood one, combining interdis-ciplinary brainpower withstate-of-the-art expertise inastronautics, communications,computer systems, feasibilityanalysis, operations analysis,reliability and other majorproblem areas.

Now, Booz-Allen AppliedResearch finds itself needingnew talent to match new andgrowing responsibilities. If youhave an eye for the theoretical,a firm grasp of the practical,and the ability to apply criticalperception to unusual prob-lems, you can enjoy a careerwith us that is both profession-ally rewarding and financiallyattractive. Please send yourresume to Mr. Robert Flint,Director of Professional Ap-pointments.

BOOZ * ALLENAPPLIED RESEARCH Inc.4815 Rugby AvenueBethesda, Maryland 20014Washington * ClevelandChicago * Los AngelesAn equal opportunity employer

325

V E T E R I N A R YPATHOLOGISTWe have an opening for a D.V.M. withM.S. or Ph.D. in pathology as veterinarypathologist to our Biological Researchi Lab-oratory. XVill conduct and supervise theresearcih and diagnostic activities of pathol-ogy section. A.C.V.P. certification pre-ferred, but not essential. Salary com-nieiisurate with training and experience.

Send Complete Rstsmet to:-Mr. Joseph T. BevanPersonnel Manager

THE NATIONAL DRUG CO.I Div. of Richardson Merrell, Inc.

4663 Stenton AvenuePhiladelphia, Pa. 19144An Equal Opportunity Employer I

V

- -

/10,

At

IiiiiiiIiiiiiBIIIIiiii~ POSITIONS OPEN i1IDIUIIIDOIDDIIIVOI

APPOINTMNIENTS IN BIOLOGYDALHOUJSIE ILTNIVERSITY

HALIFAX, NOV A SCOTIA, CANADA

DalhoLISie Univeitsits insvitcs applications for

three positions irs thec Departmiient of Biology.Appoinitments will bc tnade ait the rank andsalary appropriate to teaching and research ex-perience. For a reccnt Ph.D. the starting salarywvill not be less thats $7001.Preference shill hc gisen to aippflic.ijts %s\tjl

specialization its the following fields: experi-mental zoology (incluiding celltilar and ncturo-physiology as svell as invertebrate behavior, ex-perimental plant taxonomy; algology, plantvirology or nivcology; plant physiology or bio-physics.

Applications, givitsg ctirrictIltisii vitac, tcacliingexperience, list of pciblications arid addresses ofreferees, shotild be sent to Head, Denartment ofBiology, Dalhousic tUniv ersity. Halifax, NovaScotia, Canada. 1 29

Biochemistry faculty position in chemistry depart-ment. In addition to an active intcrest in tcach-ing, strong research orientationi is requiired forPh.D. and M.S. thesis directioni. Rankk and salaryopen. Send r6surmn to:

Arthur Fry, Chairman, Department of ChemistryUniversity of Arkansas,

Fayetteville, Arkansas 72701

Experienced Clinical Chemist wantedto supervise specialized Biochemis-try Dept. in southern Calif. labora-tory. Advanced degree required.

Salary $12,000 Per YearBox 23, SCIENCE

LITERATURE ABSTRACTERSTwo responsible positions in Medical De-

partment of ethical pharmaceuticals companyfor individuals with B.S. or M.S. in biologicalsciences or related fields, and a minimum of1 year experience in evaluating and abstract.ing scientific data. Familiarity with librarytechniques and writing ability essential.

Duties are to analyze, evaluate, index,abstract and retrieve information from medi-cal literature.

. Excellent Salaries.Liberal Benefits . . .

. . Unique Vacation Program . .Send complete resume of educcnional back-ground and experience, with salary historyand iequirements to:

PERSONNEL DIRECTORGEIGY Chemical Corp.

P.O. Box 430, Yonkers, N.Y.An Equal Opportunify Employer

PHARMNIACOLOGIST, Ph.D.Strotng background in behavioral pharma-cology.

Radiation BiologistPh.D., NM.S., or D.V.M. to expand scrcc-ing program of anti-radiation drugs. SalarycommenstLirate with experience. (irowingcompany in metropolitan Washinigton area.Send rrsumrn to Woodward Research Cor-poration, Box 405, Herndon, Virginia.

VE'TERINARY PAl HOLOGIST

HAZIETON lABORATORIES. a leading inde-pendent company specializing in the ife Sciences,neceds a Vetcrirsarv P'athologist (D.V.M.-M.Sc.or Phl).) xsitls to 3 yc.rs experience. Posi-tiOti involves cxaninination and evaluLation ofhistolcgy slides fronsi a variety of research ani-mals. OpportuLnity lor inexperienced individual toqualify for Boards. Some research coordinationincluding experissecnt design and evaluation. Op-porttnitY for scicistitic mectings attedidance andpublicatiotls. Liberal employee benefit programincltiding profit sharing. Salarv coninienstiratcwitls expet iticc atd eclicetaion. Please sen(l rc-sumn6 to

liall Acufl(A s.siasta Personnel MaitagetHazlelon laboratories, Inc.

P.O. Box 30Falls Church, Virginia

(Suburbani Washington. D.C.)At?1 O,111yortimitY Emnplorcr

326

1lllllllllllll}llllls FELLO W'SHIPS I||||||i||llllllll

Predoctoral Assistantships and Traineeships inPhysiology. Excclletlt opportuLnities for gradciatestcUdents leading to the Ph.D. Ample stipetidsand frCC ttlition. Trainiis1g anid research in bio-physics, cell1tlar physiology, enidocriisology,mtuscle, walter metabolism, cardiovascutla.r. gas-trointestintl. WVritc for details to:

Hlecid, Duparutieuiu of Pil rsiologrUniversity of Illinois at the Mledical Center

Chicago, Illinois 60612

OCEANOGRAPHY ANI) METEOROLOGY

Graduiatc fellowships trainieeships and 12-monitlhresearchl assistantships av.ailable at Texs A&MUniversity. Stipends raingc from $21t0t0 to $4t)()0.Academic capability in biology, chemistry, engi-neering, geology, mathemiatics. meteorology, orphysics and broad scietititic interests required.For information and application forms contactHead, Department of Oceanography and Meteor-ology, Texas A&Ml University, College Station,Texas.

TRAINEESHIPS FOR GRADUATE WORKIN PHARM I.XCOI,OGY

A 4-year prosgram of cotirse work anid reseairchitraining leading to the Ph.[). degree is offered.U.S. citizetss only. Researchs in ftindamentalmech:unisms of dlrtug actioni. Startinig anntial sti-pend $24110 pltis ittLition ;tnd $50)( per depenident.Early applicatiors for September 1965 stronglyadvised. Write: Departmenit of Phiarmacology,School of Medicine, State Univ. of New Yorkat Buffalo, 122 Capen Hall, Buffalo, N.Y. 14214.

1/29; 2/14, 26; 3/12

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For fttiither inforniation writeHORMONE ASSAY LABORATORIES, Inc.

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SYMPOSIUM ON BASICRESEARCH

Editor: Dael Wolfle 1959

AAAS Symposium VolumeNo. 56

328 pages, cloth $3.00

AAAS members' cash order, price$2.50

Sponsored by the National Academyof Sciences, the American Associationfor the Advancement of Science, andthe Alfred P. Sloan Foundation.

CONTENTS

J. Robert Oppenheimer, The Need forNew Knowledge

Alan T. Waterman, Basic Research inthe United States

W. 0. Baker, The Paradox of Choice

Laurence M. Gould, Basic Researchand the Liberal Arts College

C. A. Elvehiem, Basic Research andthe State University

Lee A. DuBridge, Basic Research andthe Private University

James R. Killion, Jr., Capsule Conclu-sions

Crawford H. Greenewalt, Basic Re-search: A Technological Savings Ac-count

Dwight D. Eisenhower, Science: Hand-maiden of Freedom

Allen V. Astin, Basic Research in Gov-ernment Laboratories

James B. Fisk, Basic Research in In-dustrial Laboratories

Merle A. Tuve, Basic Research in Pri-vate Research Institutes

Paul E. Klopsteg, Support of BasicResearch from Government

Robert E. Wilson, Support of BasicResearch by Industry

Robert S. Morison, Support of BasicResearch from Private Philanthropy

Dael Wolfle, The Support of Basic Re-search: Summary of the Symposium

British Agents: Bailey Bros. & Swinfen, Ltd.Warner House,48 Upper Thames Street,London, E.C.4

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SCIENCE, VOL. 147

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