The new Perkin-Elmer HGA-2100 :the best in flamelessAA gets better.

The new HGA-2100 Graphite Furnace com-bines unmatched performance with ease-of-use and safety. The large sample capacity andhigh sensitivity provide outstanding detectionlimits. The new opposed gas-flow system andimproved furnace temperature distributionmake previously difficult analyses routine. Thenew mounting system enables quick and easyalignment without tools and simplifies inter-changing the HGA-2100 with flame systems.

Samples in solution are pipetted directlyinto the Furnace, while solid samples are in-serted from the end. During the operator-controlled temperature program, the opposedinternal gas-flows (shown in the cross-sectional drawing above) confine the sampleto the hotter central portion of the Furnaceeliminating potential condensation problemsand substantially reducing background ab-sorption with many types of samples. The op-posed gas-flows efficiently sweep from theFurnace all vaporized sample matrix. Duringatomization, the gas-flows are automaticallyreduced to provide maximum residence timeand sensitivity.Check these HGA-2100 features against your

requirements for flameless sampling.SafetyO No flames or combustible gases required.o Temperature-sensing safety system to con-

trol maximum external furnace tempera-tu res.

o Closed furnace design for operator protec-tion.

Performance' Detection limits 10OX to 100OX better thanwith flame sampling.

w Opposed gas-flow design to eliminate con-densation and minimize potential back-ground absorption interferences.

w Sample solution capacity of up to 100 micro-liters for best detection limits.

w Constant current power supply with feed-back control gives outstanding day-to-dayand lab-to-lab reproducibility (and compen-sates for most voltage reductions auto-matically).

w Fully automatic gas controls with variableatomization-flow for control of sensitivity.

o One graphite tube optimized for all ele-ments, for aqueous or organic solutions, andfor solid samples.

' Less than 30 seconds cooldown time to pro-vide faster sample analyses.

Convenienceo Readout directly in temperature from am-

bient to 2800°C in all three cycles (tempera-tures are continuously adjustable).

ao Automatic temperature programming withtime and temperature under operator con-trol.

o Automatic readout controls for remotelyactivating recorder, peak reader, etc.

O Convenient and quick alignment withouttools.

For further information, write InstrumentDivision, Perkin-Elmer Corporation, Main Ave-nue, Norwalk, Connecticut 06856.Note: Perkin-Elmer offers several versions of the Graphite Furnacewhich have similar control functions, performance characteris-tics, and price. To determine which version is available inyour area contact your local Perkin-Elmer sales representative.

IPERKIN-ELMERCircle No. 120 on Readers' Service Card

n

The General Purpose, High Precision,Digital Oscilloscope is a 12-page bro-chure that outlines the characteristicsand capabilities of devices incorporatingdigital techniques. Nicolet InstrumentCorporation. Circle No. 801 on Read-ers' Service Card.

Circle No. 168 on Readers' Service Card

Harris Manufacturing Co., Inc.14 Republic RoadTreble Cove Industrial ParkNorth Billerica, Mass. 01862(617) 667-5116

Circle No. 167 on Readers' Service Card

X. PsychosurgeryExper ntation on Fetuses

A "Right to Die"Sex Determination

If these issues interest you, youwill want to know about the Instituteof Society, Ethics and the Life Sci-ences, a non-profit research organiza-tion.

Through an Associate Member-ship program, the Institute offers bothprofessionals and interested laypersonstools to form a perspective on theawesome and challenging social, legaland ethical problems surrounding newdevelopments in biology and medicine.

Two interdisciplinary publica-tions, the bimonthly HASTINGS CEN-TER REPORT and the thrice-yearlyHASTINGS CENTER STUDIES, aresent to all Members. Authors of recentarticles include: Sissela Bok, DanielCallahan, Joseph Fletcher, Willard Gay-lin, Ivan Illich, Christopher Lasch,Robert S. Morison, Paul Ramsey andVictor Sidel.

By becoming an Associate Mem-ber now you will receive, among otherservices and opportunities, the 1974edition of our 96-page BIBLIOGRA-PHY, containing pertinent referenceson science and technology, populationcontrol, genetic counseling and engi-neering, death and dying, behaviorcontrol-and more. Dues are $15 annu-ally.

Won't you join that growing num-ber of individuals concerned with thebiomedical issues that confront scienceand society?

niture, supplies, and chemicals. FisherScientific Company. Circle No. 790 onReaders' Service Card.

Literature References 1974 docu-ments the use of Sephadex, Sepharose,dextrans, and Ficoll in research appli-cations. Pharmacia Fine Chemicals.Circle No. 791 on Readers' ServiceCard.

Plastic Centriflugeware Catalog in-cludes plastic tubes and enclosures foruse in ultracentrifuges and in radio-immunoassays and other multi-tubeprocedures. Cal-Nova ManufacturingCompany. Circle No. 792 on Readers'Service Card.

Series MKK and BMKK Laboratoryand Medical Microscopes outlinesmonocular and binocular designs forapplication in clinical and medicallaboratories. Unitron Instrument Com-pany. Circle No. 793 on Readers'Service Card.

8800 Turret-Head Sequential Spuit-tering System is the subject of an il-lustrated brochure. Materials ResearchCorporation. Circle No. 794 on Read-ers' Service Card.

Prestidigitator is an illustrated prod-uct sheet that gives specifications of themodel 801A pH/millivolt meter. OrionResearch Incorporated. Circle No. 796on Readers' Service Card.

Concrete Testing Equipment Catalogdevotes 88 pages to apparatus for in-dustrial, research, and engineering ap-plications. Soiltest, Incorporated. CircleNo. 797 on Readers' Service Card.1974 Lab Instruments Catalog de-

scribes more than 120 devices includ-ing flowmeters, syringes, burets, ma-nometers, and McLeod gauges. RogerGilmont Instruments, Incorporated.Circle No. 798 on Readers' ServiceCard.

Series 5830A Reporting Gas Chroma-tographs illustrates and describes func-tions and specifications of a line ofanalytical systems. Software integration,programming, and setup are detailed.Hewlett-Packard Corporation, Avon-dale Division, Circle No. 799 on Read-ers' Service Card.

Clinilogics is a newsletter that incor-porates descriptions of clinical tech-niques and products and light humor.Calbiochem. Circle No. 800 on Readers'Service Card.

The First wide RangeMicrotome-cryostat...Temperatures Irom-15°C 10 -500C....

Frozen Sections

The Harris LoTemp model WRCis two microtome-cryostats inone. A single unit that can doboth routine diagnostic pro-cedures and such sophisticatedresearch procedures as thinsection light microscopy, auto-radiography, fluorescence mi-croscopy and other histologicalprocedures, at a cost compar-able to presently availableroutine cryostats.The Harris model WRC is

compact ... can be moved any-where it's needed. The coldchamber has extra room fortissue handling, storage orfreeze drying. Full opening topwith special access ports com-bines the features of a totallyclosed system with the easy ac-cessibility of open top models.

Available equipped with Jungor International EquipmentCorp. microtomes, or cryostatonly prepared for installation ofyour present l.E.C. microtome.Installed stereo zoom micro-scope also available.

For a full description of theHarris WRC and its wide rangeof additional features write orcall . .

BOOKS RECEIVED

(Continuled from page 892)

New Towns in America. The Designand Development Process. James Bailey,Ed. American Institute of Architects,Washington, D.C., 1973 (distributor,Wiley-Interscience, New York). xii, 166pp., illus. $19.95.Nonaqueous Electrolytes Handbook.

Vol. 2. G. J. Janz and R. P. T. Tomkinsand eight others. Academic Press, NewYork, 1973. xiv, 934 pp., illus. $60.

Nonlinear Elasticity. Proceedings of asymposium, Madison, Wis., Apr. 1973. R.W. Dickey, Ed. Academic Press, NewYork, 1973. x, 404 pp. illus. $12.50. Pub-lication No. 31 of the Mathematics Re-search Center, University of Wisconsin.

Progress in Optics. Vol. 11. E. Wolf,Ed. North-Holland, Amsterdam, 1973(U.S. distributor, Elsevier, New York).xvi, 358 pp. illus. $40.The Project Physics Course. Supple-

mental Unit B, Discoveries in Physics.David L. Anderson. Holt, Rinehart andWinston, New York, 1973. iv, 92 pp.,illus. Paper, $3.48.

Right and Left. Essays on Dual Sym-bolic Classification. Rodney Needham, Ed.University of Chicago Press, Chicago,1974. xl, 450 pp., illis. $19.50.

Sites, Perception, and the NonvisualExperience. Designing and ManufacturingMobility Maps. Ann Middleton Kidwelland Peter Swartz Greer. American Foun-dation for the Blind, New York, 1973.xviii, 192 pp., illus. Paper, $5.95.

Sourcebook on the Environment. TheScientific Perspective. Charles ReVelle andPenelope ReVelle. Houghton Mifflin, Bos-ton, 1974. x, 332 pp., illus. Paper, $4.95.

Spectroscopic Properties of Inorganicand Organometallic Compounds. Vol. 6.A Review of the Literature Published dur-ing 1972. N. N. Greenwood, senior re-porter. Chemical Society, London, 1973.xvi, 664 pp., illus. £11. Specialist Peri-odical Reports.

Strange Phenomena. A Sourcebook ofUnusual Natural Phenomena. Vol. G-1.William R. Corliss. Published by the au-thor, Glen Arm, Md., 1974. vi, 278 pp.,illus. In looseleaf binder, $6.95.Las Tierras Cultivadas de Caldas de

Reyes. Sanchez Rodriguez and G. DiosVidal. Misi6n Biol6gica de Galicia, Sal-cedo, Pontevedra, Spain, 1973. viii, 236pp. + maps. Paper.

Topophillia. A Study of EnvironmentalPerception, Attitudes, and Values. Yi-FuTuan. Prentice-Hall, Englewood Cliffs,N.J., 1974. x, 260 pp.. illLs. Cloth, $8.95;paper, $4.95.Toward a Political Sociology of Science.

Stuart S. Blume. Free Press (Macmillan),New York, and Collier Macmillan, Lon-don, 1974. xiv, 288 pp. $9.95.

Understanding Statistical Reasoning.How to Evaluate Research Literature inthe Behavioral Sciences. Eleanor WalkerWillemsen. Freeman, San Francisco, 1974.xiv, 224 pp., illus. Cloth, $10; paper,$4.95. A Series of Books in Psychology.

Viruses and Invertebrates. A. J. Gibbs,Ed. North-Holland, Amsterdam, and El-sevier, New York, 1973. xvi, 674 pp.,illus. $60. Frontiers of Biology, vol. 31.24 MAY 1974

^ perfectOne Quart

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for fixed or variable volume. t. Pend.

To suit your individual requirements, you can now obtain theBuchler Micropipet in a variable volume model from 2 to 10 ul ...or in fixed volumes of 2, 3, 4, 5, 6, 7, 8, 9,10, 20 and 50 ul.* Suitable for titration, blood cell counting, flame photometry or RIA.* Flow-thru diluent wash eliminates sample carryover and delivery

errors.* ReprodUcibility to a ±0.3% coefficient of variation.

Individual pipets available invariable or fixed volume. Set of 3fixed volumes specified by you,including rack and case,package-priced at only $295.

Buchlier InstruimentsDivision of Searle Analytic Inc.1327 Sixteenth StreetFort Lee, New Jersey 07024 Circle No. 151 on Readers' Service Cord

)VISIT US AT 1974 BIOCHEMISTRY MEETING-BOOTH El

II-

|||||||||||||||POSITION>S WANTED ||||||||||||||

Agricultuirist. Ph.D I'lant P.athology 1972. Post-doctoral expericnce. PuLblications. Rescarch indiseatses of sevcral differetnt crops. Academic posi-tion preferrect. Available JuLly 1974. Box 255,S( IIFNCE. X

Analtical-Physical Chemist, Ph.D. 1971 in NMIR,tso postdocs in GLC and HPLC. 19 pLublicationsin NNIR. GLC, HPL(, druLg SAR. Factor Anialv-sis, sceks industrial, government, or tiachling posi-thon, ilo geogr.tphic.il prcference. P. H. Weiner,C hentisrs Departmeiitt Northetastern University,Boston. Nlass. )2115. 51131

Cell Physiologist, Biochemist-Microbiologist Ph D1971. Orgari, tissLI, tLimor, Cell cLltLire. Morpho-geiesis. Three yc.r postdoctorate on antigenticeflycoprotcins, polysaccharides, immctinology, nol-cleic acids, enzysmcs. Seeks research position inclinicil, itilstittitiolo, academic, indls.rs. Box 256,SCIENCF. X

Cytogeneticist. lh. D. 1965. Seeks teachitng/re-sc,irch positioin. Cytogenlctics (hutmati .inld planit),CCllal.ir raidiobiologvy hotails Traiinedl in scanninigitxcd trainlsmissiotl elcctron microscops. TisstieC LltLtl-ist. Teachitg experience. PUhblic.ittons. Box273. SCIENCE. X

Creative Applied Mathematician-Scientific Com-puter Programmer-Pharmacokineticist. Ph. D. 1972.Experienced in data gatheritng, devclopment ofmlathcimattical models, and compuLter simLilatioti ofcIrLug dispositiol. Seeks research or indIustrial posi-tioil rclated to deselopments of clinical importancein enrdocrinology, chemotherapy, toxicology, diag-rlosis, .itld so forth. Box 258, SCIENCE. X

Entomologist/Sanitationist. MS. Expericenced it:ipplictd entomology, sariitaticin, control. idetitti-c.titOtl, muIsetum work, rearing, teaching, ecologicalinvcstig.utions. Desires teachiltig or relev an:t posi-tiot:. Box 259, SCIENCE. X

Fluid Dynamicist, Ph.D., AuJ(gulSt 1974, Rees.irchexpericncc ini rotatitig flow s, bcltidarv las ers anldcltrllpuItational fluLid dxnamics. Job a.id teachinglgcxperienlc. PuLblications. Seeks challenging R & 1)Position. Box 260, SCIENCE. 5131

I'h.D-NI.D. Organic Sulfur Chemist, Ph.D. 19711.FouLr vcars suLbsequLent experience synthesis ste-roid chemistry. M.D. to be completed early 1975.PtLblic.tittts it: both areas of chemistry ant:d inmedicine Seeks uiniquie position uitilizinig bothldcgrees. Box 261. SC'IENCE. X

Plant Physiologist (Water Relations). Fouir ycarspostdoc. puLblicatiotis. broad rcsctrch interests atndexperitelce, goo>d technical backgrouLnd, sometc.lching experience. Seeks research or rcseircht.told te.iching position. Available immediatelsEclss i I_ Fisculs. Deparintment of Botanly, D;ke

scixluira.l)iith.ni:t Noil i Carolihnt 2770)6. 6 14

SCIENCE, VOL. 184

PersonnelPlacementr fln

It is requested that only those employerswho will not discriminate on the basis ofrace, sex, religion, color, or nationol originsubmit positions open advertising.POSITION WANTED: 40¢ per word, mini-

nmum chorge $10. Use of Box Numbercounts as 10 additional words. Paymentin advance is required. These rates applyto individuals only. Personnel agencies andcomponies take display rate for all odver-tising.

POSITIONS OPEN: $110 per inch. No chargefor Box Number. Rates net. No aqencycoommission allowed for ads under 4 inches.No cash discount. Ads over 1 inch will bebilled to the nearest quarter inch. Paymentin advance is required except where satis-factory credit has been established.

COPY for ads must reach SCIENCE 4 weeksbefore issue date (Friday of every week).Send copy for Personnel Placement adver-tising to:

SCIENCE, Room 2071515 Massachusetts Ave., NW

Washington, D.C. 20005Replies to blind ads should be addressed

cis follows:Box (give number)SC ENCE1515 Massachusetts Ave., NWWashinqton, D.C. 20005

r I

%N

0 1111 POSITIONSSWANED 111111111|111|INjI|POSIONS OPEN|| |||||| gggigggigggiii POSITIONS OPEN aai01taieiiii1iStatistician. Ph.D. 1973. Dissertation in discrimi-nant analysis. Mathematical and statistical analy-sis including design of experiments, mathematicalmodeling (Monte Carlo), regression analysis, PERTnetworking, and systems analysis. Publications.Twenty-one years of experience. Seeking govern-ment position (GS-13) in applied statistics inmetropolitan Washington. Box 129, SCIENCE. X

Toxicologist, M.S. Clinical Chemistry. Ph.D.Pharmacology, summer 1974. More than 6 yearsof experience in clinical and forensic toxicologyand breath alcohol testing. Publications. Experttestimony. Seeks clinical chemistry and/or teach-ing position. Box 262, SCIENCE. X

Toxicologist. Ph.D. in Toxicology, 1972. Twoyears of postdoctoral teaching and research ex-perience. Strong in toxicology (mechanistic) anddrug abuse. Seeks research/teaching position. Box241, SCIENCE. 5/31

wMnllljlI POSITIONS OPEN |||||||||1!lll!l

DEAN, COLLEGE OF NATURAL SCIENCESAND MATHEMATICS

The University of Houston is seeking a Deanfor the College of Natural Sciences and Mathe-matics which includes the departments of Biol-ogy, Biophysical Sciences, Chemistry, ComputerSciences, Geology, Mathematics, and Physics.The candidate should be widely knowledgeable

in natural sciences and mathematics, recognizedfor excellence in teaching and research, as wellas having appropriate administrative experience.

Applicants should send complete resumes to:Joseph P. Buckley, ChairmanAdvisory Search Committee

Room 212 FUniversity of HoustonHouston, Texas 77004

The University of Houston is an Equal Op-portunity, Affirnative Action Employer.

AQUATIC BIOLOGISTFaculty position at Assistant Professor rank

with specialization in ecology of stream macro-benthos and expertise in other aspects of streamecology. Responsibilities to include team and in-dependent research, water pollution related exten-sion activities and some teaching in area ofinterest.

Interested persons should send curriculum vitaeand three letters of recommendation to: Dr.Robert A. Paterson, Department of Biology,Virginia Polytechnic Institute and State Univer-sity, Blacksburg, Virginia 24061.VPI and SU subscribes to an affirmative action

program regarding the employment of minoritygroups and women.

ASSISTANT PLANT PATHOLOGISTPosition available for a scientist with a Ph.D.

in Plant Pathology and training in bacteriologyand microbial genetics. Research emphasis willinclude the ecology and genetics of bacterial plant1-athogens and those bacteria which colonize plantsand agricultural soils and may be involved inproblems of human health. Applicants should sendcurriculum vitae and have three letters of refer-ence sent to Dr. D. E. Schlegel, Chairman, De-partment of Plant Pathology, University ofCalifornia, Berkeley 94720, by 31 July 1974.Time Unirersity of California is an AffirmativeAction, Equtal Opportunity Employer.

ASSISTANT PROFESSOR, M.D., to take partin ai projcct to bo pUrsued in tile hematologyse:..on of the department of medicine in coopera-!iion with the departmen:t of physiology to applymodern physiologicai and biochemical metlhods tothe ii:vestigation of the membrane characteristicsof abnormal red blood cells. Applicanit shouldhave completed clinical training in order toUndertake cli;tical responsibilities in the hematol-ogy scction and have a strong background andinterest in th-ie metabolic and physiological prop-eities of r-ed cells. Send cui-riculLum vitae andnames of persons who may be requested to sup-ply references to Department of Physiology, 333Cedar Street, New Haven, Conn. 06510.Applications Ironti womleni and mnemnbers of

miniioority groups are enzcoutraged.

Postdoctoral appointments andstaff positions at Argonne NationalLaboratory

Positions at the Ph.D. and B.S.levels are available in ongoingresearch programs. Openings inthe Environmental Statement Proj-ect Group are involved in mea-suring and assessing the environ-mental impact of the utilizationof nuclear and fossil fuels onlakes and rivers. Openings in theRadiological and Environmental Re-search Division are concernedspecifically with the ecologicalproblems of the Great Lakes re-gion. Areas of interest includelimnology, aquatic and terrestrialecology, soil science, and meteor-ology.

Please send resume in confi-dence to: Mr. Ronald A. Johns,Argonne National Laboratory,9700 South Cass Avenue,Argonne, Illinois 60439.

A ARGONNENATIONALLABORATORY

Aneq opportunity employer m/f

923

POSTDOCTORALFELLOW

BIOCHEMICALPHARMACOLOGY

Opportunity for an individualto collaborate with an estab-lished senior investigator. Re-search will be in the area ofadrenal catecholamine biosyn-thesis and will complementan ongoing drug developmentprogram. Publications encour-aged.Requirements include recenttraining (Ph.D.) in Pharmacol-ogy with strong biochemicalorientation. Should have ex-perience and/or strong desireto work in catecholaminearea.This postdoctoral assignmentis for 1 year, with possibil-ity of second-year renewal.Minimum salary $12,360 plusexcellent employee benefits.Send curriculum vitae to S. J.Beston, Employment Manager,1518 Spring Garden Street,Philadelphia, Pa. 19101.

SMITH KLINE & FRENCH LABSDivision of

SmithKline Corp.Equal Opportunity Employer MIF

UNIVERSITY OF OTAGODUNEDIN, NEW ZEALAND

LECTURER ORSENIOR LECTURER

IN CLINICALBIOCHEMISTRY

Applications are invited from medicalor science graduates for the positionof Lecturer or Senior Lecturer inClinical Biochemistry.Salary, according to qualifications andexperience, within the following scales:

Science Graduate:Lecturer: $NZ6,753 to $8,568 perannum.Senior Lecturer: $NZ8,718 to $11,139with a bar at $10,232 per annum.

Medical Graduate:Lecturer: $NZ9,172 to $13,107 witha bar at $10,836 per annum.Senior Lecturer: $NZ13,485 to$15,528 per annum.

(Note: $NZ 100 equals approximatelySUS 138)Salary scales are subject to reviewand cost-of-living adjustments.Applications quoting Ref. A.74/15,close on 30 June 1974. For furtherparticulars write to Secretary-General,Appointments Department, Associationof Commonwealth Universities, 36Gordon Square, London WC1, or tothe undersigned.

J. W. Hayward,Registra r

I U

FACULTY POSITIONS AVAILABLESCHOOL OF MEDICINE

WRIGHT STATE UNIVERSITYDAYTON, OHIO 45431

The Wright State University School of Medi-cine is a developing medical school located insouthwestern Ohio. The preclinical segment ofthe curriculum will be based at Wright StateUniversity and will draw upon the combined re-sources of Wright State, Central State, and Miamiuniversities as well as other local institutions.The clinical curriculum will be implemented usingthe facilities of the area hospitals which havemade available more than 2000 beds for medicaleducation.

The School of Medicine will emphasize theeducation of primary care physicians, particularlyin family practice. The school will have anextensive commitment to medical outreach pro-grams, continuiing education, and related programsin allied health.

Faculty appointments in the basic sciences willbe dual appointments both to the School ofMedicine and the College of Science and En-gineering. Interested personnel with qualificationsin anatomy, physiology, biochemistry, pharmacol-ogy, and microbiology are invited to apply.

Appointments in the clinical areas will bemade to the School of Medicine. Applicationsare invited from physicians with qualifications inanesthesiology, internal medicine, obstetrics-gyne-cology, clinical pathology, psychiatry, radiology,family practice medicine, surgery, pediatrics, com-munity medicine, physical medicine, and post-graduate medicine.

The University is particularly interested inrcceiving applications from experienced and well-qualified persons who are committed to thephilosophy and goals of the Wright State Uni-versity School of Medicine. Applications withsupporting documents may be directed to:

John R. Beljan Brian L. HutchingsDean Designate Acting Dean, College ofSchool of Medicine Science and Engineering

Wright State University is an equal opportun-ity, affirmative action employer.

24 MAY 1974

POSITIONS OPEN *fl jj|1 POSITIONS OPEN lvillll3 I POSITIONS OPEN

ANATOMISTDepartment of Anatomy of the Mount Sinai

School of Medicine has an opening at the levelof Instructor or Assistant Professor. The candi-date should be able to assist in the teaching ofhistology and neuroanatomy and is expected topursue an active research program. Please sendcurriculum vitae including list of publications andthe names and addresses of three references to:Tibor Barka, M.D., Chairman, Department ofAnatomy, MOUNT SINAI SCHOOL OF MEDI-CINE, Fifth Avenue & 100 Street, New York,N.Y. 10029. An equal opportunity/affirmativeaction employer.

McGILL UNIVERSITYMontreal, Quebec, Canada

Applications are invited for a 2-year appointmentat the Assistant or Associate Professor level for aBIOLOGIST-PHYSIOLOGIST with strong BIO-MATHEMATICAL interests in the Departmentof Physiology starting 1 September 1974. The de,partment hopes to be able to extend the appoint-ment. Responsibilities include teaching undergrad-uate- and graduate-level science courses. Sendapplications with curriculum vitae and names ofthree references to:

Ms. Maria OlejarDepartment of Physiology3655 Drummond Street

McGill UniversityMontreal, P.Q., H3G 1Y6, Canada

ECOLOGISTApplications are invited for a faculty position

at the assistant professor rank in the area ofcommunity ecology. Applicants should be con-ceptually/theoretically oriented. Responsibilitiesinclude teaching at both the undergraduate andgraduate levels in an ecology program. The per-son chosen will be expected to establish an activeresearch program. Salary negotiable.Send curriculum vitae and names of three

referees to:Dr. Roy W. McDiarmid

Chairman of Search CommitteeDepartment of Biology

University of South FloridaTampa, Florida 33620

Application deadline: '15 August 1974An Equal Opport*unity/Affiumative Action Employer

ECOLOGIST-NATURALISTThe Institute for Environmental Studies invites

applications for an Assistant Professor, Ecologist-Naturalist position, teaching and research forSeptember 1974 appointment. A general back-ground in ecology, strength in one of the naturalsciences, and an interest and history in environ-mental affairs involvement is required. Teachingwill be in such course areas as introduction toenvironmental studies, natural processes in eco-systems, and man/environment interactions. Ex-perience in participating in multidisciplinary re-search projects and in team teaching is essential.Qualifications of the applicant should be accept-able to their on-campus discipline. Send resumesto: R. 0. Sylvester, Director, Institute for En-vironmental Studies, 112 Sieg Hall FR-40, Uni-versity of Washington, Seattle, Wash. 98195.An Equal Opportunity/Affirmative Action Employer

924

ELECTRON MICROSCOPISTM.D. or Ph.D. to participate in research studies

involving mammalian cardiac tissue. Permanentappointment, federal Civil Service salary andfringe benefits. Please submit curriculum vitae to:Anthony N. Damato, M.D., Department of Cardi-ology, U.S. Public Health Service Hospital, StatenIsland, N.Y. 10304.

Equal Opportunity Employer

EXPERIMENTAL PHARMACOLOGIST/PHYSIOLOGIST

Required: Experimental pharmacologist/phys-iologist with experience with ECG technique andx-ray photography; required to work in NewJersey area, on a cardiovascular research pro-gram in dogs.Send curriculum vitae to:

Personnel DepartmentAmerican Health Foundation1370 Avenue of the AmericasNew York, New York 10019

EXPERIMENTAL PSYCHOLOGISTExperience in visual psycho-physics in animals

lrequired. Some knowledge Qf psycho-pharmacol-ogy desirable. Ph.D. or Master's with experience.Immediate. Contact: Chief NeurophysiologicStudies Branch, DHEW:PHS, FDA, BRH:DBE,12709 Twinbrook Parkway, Rockvlle, Md. 20852.

FACULTY POSITIONIt is anticipated that a faculty position will

become available 1 July 1974. Applicants must beexperienced teachers of gross anatomy and havean active research program in progress.Send curriculum vitae and the names of three

referees to: Chairman, Department of HumanAnatomy, School of Medicine, University ofCalifornia, Davis, California 95616.

IMMUNOLOGIST OR CELL BIOLOGISTAssistant Professorship available starting 1

September 1974 for an immunologist or for a cellbiologist interested in structural aspects of de-velopment. Applicant must present evidence ofexcellence in teaching at the introductory level ingeneral biology, and at the intermediate/advancedlevel in area of research specialty. Active researchprogram is essential.

Please send curriculum vitae, reprints, andthree letters of recommendation to:

Mary Ella FeinleibBiology DepartmentTufts University

Medford, Mass. 02155Application deadline: 5 June 1974.Tufts University is an Affirmative Action Em-

ployer. Applications from women and minoritycandidates are especially welcomed.

GROUP LEADERImmunohematology/Blood Banking

Leading Miami, Florida, health care manufacturer seeks group leaderin Immunohematology for growing research and development department.Ideal candidate will be Ph.D. with 3 years' experience or M.S. with6 years' experience in immunohematology/serology, research and de-velopment or manufacturing experience in blood bank reagents helpful.Individual will provide technical direction and supervise research scientistsin product research and development.

Please send resume in confidence to:

Vice President-PersonnelDADE

Division of American Hospital Supply CorporationP.O. Box 520672

Miami, Florida 33152

An Equal Opportunity Employer

Equal opportunity/affirmative action employerHAZLETON

LABORATORIES, INC.

SCIENCE, VOL. 184

RESIDENT CHEMIST-SERVICE CHEMICAL LABORATORY

Routine analyses are performed on seawatersamples for technicians, students, and faculty whoare engaged in research on estuarine and oceanwaters. The resident chemist must be able to per-form analyses, supervise laboratory techniciansand advise users of the laboratory service. Meth-ods employed utilize simple titrametric, colorimet-ric, fluorometric, conductrimetric analyses, liquidscintillation counting, atomic absorption, non-dispersive infrared analyses, and automated pyrol-ysis analyses.Minimum hiring requirement is a Bachelor's

degree in Chemistry or Oceanography with prefer-ence shown to candidates with a Master's degreeor equivalent experience. Apply to:

Dr. A. InderbitzenUniversity of Delaware

College of Marine StudiesPost Office Box 286

Lewes, Delaware 19958

Core CuratorComplete curating responsibility

for an extensive collection of deep-sea sediment cores. Superviseprocessing and cataloguing, editcore descriptions, staff and traingeologists for research vessels,supervise distribution of core anddredge samples, be responsible forsupplying ships with coring equip-ment, upgrade computer handlingof data, supervise nine to ten peo-ple.

B.S. (or M.S.) in Geology. Super-visory ability. Prefer related experi-ence at an oceanographic institute.

Please send resumes to:

Dr. James D. HaysLamont-Doherty Geological

ObservatoryPalisades, New York 10964

An Equal Opportunity Employer

LIFE SCIENCES

Hazleton Laboratories, Inc., a leading contractresearch company specializing in the life sciences,is seeking accomplished scientists with the fol-lowing qualifications:

VIRAL ONCOLOGIST

Senior Scientist holding Ph.D. degree with fiveor more years of experience to head active,ongoing program in viral oncology. Desired candi-date should have demonstrated active researchexperience in virus-tumor systems with specificemphasis on tissue culture, immunological, andbiochemical techniques. Must be able to functioneffectively as head of research team conductingcomprehensive study of tumor etiology.

IMMUNOLOGIST

Senior Scientist holding Ph.D. degree with fiveor more years of experience to establish a pro-gram in tumor immunology and to participate inongoing research projects. Direct experience indevelopment and evaluation of immune mecha-nisms and studies of tumor antigens is required.

Opportunity exists to collaborate with excellenttechnical staff in modern research facilitieslocated in a pleasant Northern Virginia location.We offer competitive salaries, complete benefitprogram, relocation, and opportunity for con-tinued professional growth.

Please send r6sum6, including salary history, incomplete confidence to Mr. Michael J. Mackert,Personnel Manager, Hazleton Laboratories, Inc.,9200 Leesburg Turpike, Vienna, Virginia 22180

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24 MAY 1974 Circle No. 172 on Readers' Service Card

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Circle No. 174 on Readers' Service Cord

Ask for our new Bulletin 4560.

Circle No. 175 on Reoders' Service Card

IChemotaxonomyof

FloweringPlantsby R. Darnley Gibbs

This outstanding work, consisting of four,Ioltinies an(l al)out 2500 pages, will l)e putll)ishe(d onJune 28, 1974. lBefor-c that (late it miav l)e ordered at thespecial price of $110.00. Thereafter, it will be availableat the regujlar )rice of i1 35.00.Among its important features are listings of plant con-stituents and their knowvn distributions; the most com-l)lete anid accuii-ate listings yet p)1o(dluced( of famiiilics of(licotyledons and monocotyledons, with original citationsand taxonomy; listings and taxonomic notes on virtuallyall the proposed orders; a bibliography of more than1(00() entries; mamn figur es and(l tables; anid ai omipreheni-sive index.CHEMIOT.XXON'O.MIY OF FLOWVERING Pl.ANTS is thcresult of nearly thirty years of stuidy, research, and com-pilation and will be the definitive work for many yearsto (com1 as:

- t tilli(qitie lefei eucc to what is ku11oss n ill tlis filcd uto the preselit tilime. alid- a majol sotirce of i(leas fos- t-escaich inl the fiutire.It wvill l)e indispensable to plant systematists, botanists,chelicists, imd all others teaching an(d researchin1g in -e-late(d fields.To order, or for further information, please write to:.McGill-Queen's University Press, 1020 Pine Aventue West,Moontreal, Ouchbec H3. 1 \2, Caniada.

|II|ElI| POSITIONS OPEN IiIIIHIiIIIIIIICOMPUTER-SCIENTIST POSITION

Instructor or Assistant Professor of ComputerScience. Ph.D. preferred, in field or related area.M.A. would have opportunity to continue grad-uate studies at Syracuse University. Knowledgeof programming, Fortran, Cobol, APL and RPG,or similar languages. Teach elementary and inter-mediate computer science courses; assist studentsand faculty in use of computer as learning andresearch tool. IBM 1130 and access to IBM 370.Send curriculum vitae to Dr. Edward B. Cutler,Utica College, Utica, New York 13502.An equal opportunity/afllrmative action employer

HUMAN GENETICS-Salary and rank open.Postdoctoral experience desirable. Applicantsmust be interested in teaching human geneticsand participating in a genetics clinic. Activeresearch commitment required, preferably insomatic cell genetics and/or immunogenetics.Michigan State University is an equial opportun-ity employer. Director, Genetics Program, 34Plant Biology, Michigan State University, EastLansing, Michigan 48824.

MEDICAL CARE FACULTYIndividual with evidence of research produc-

tivity in the specific area of quality of medicalcare. Candidates must possess an M.D. and aresearch training oriented degree at either themaster's or doctoral level. Appointment will beat the rank of assistant professor, salary nego-tiable. Send resum6 to William C. RichardsonPh.D., Department of Health Services, SC-37,University of Washington, Seattle, Wash. 98195.An equal opportunity/affirmative action employer

Applications are sought for a MICROBIOLOGISTand an IMMUNOLOGIST at the level of eitherassistant or associate professor to work withpathologists in these specialties. Send curriculumvitae and references to:

Jacob L. Chason, M.D., ChainnanDepartment of Pathology

Wayne State University School of Medicine540 East Canfield AvenueDetroit, Michigan 48201

An Equal Opportunity/Affirmative Action Employer

MYCOLOGISTApplications are invited for a position at the

Assistant Professor level. Applicants with post-doctoral experience preferred. Responsibilitieswill consist of teaching medical mycology andapplied microbiology to undergraduates and ofdeveloping graduate teaching and research pro-grams in the appointee's area of specialization.Salary and benefits competitive, opportunity forpersonal development excellent. Send completecurriculum vitae, reprints of publications, andnames of three referees to Dr. C. P. Sword,Chairman, Life Sciences, Indiana State Univer-sity, Terre Haute, Indiana 47809.

Indiana State University is an equal oppor-tunity/affirmative action employer.

Ph.D. PATHOLOGIST

Responsibility for teaching general Pathology tosecond-year medical students. Three lectures andfour lab hours weekly during academic year.Emphasis on teaching excellence. Research en-couraged but not mandatory. Faculty rank andsalary commensurate with qualifications. Modern426-bed hospital. Send curriculum vitae to Dr.E. H. Whitten, Associate Dean for AcademicAffairs, College of Osteopathic Medicine, 2105Independence Blvd., Kansas City, Mo. 64124.Tel.: 816-283-2402.

Ph.D. PULMONARY PHYSIOLOGYNeeded for a clinical chest group (who are on

part-time faculty USC/UCLA). Duties: Clinicalresearch, a variety of teaching, and developmentof new respiratory services in hospital labs.

R. L. Yanda M.D.15243 VanOwen

Van Nuys, Calif. 91405

PREDOCTORAL ASSISTANTSHIPSAND TRAINEESHIPS

In Oncology, Immunology, Microbiology, Virol-ogy, and Molecular and Cellular Biology. Pre-requisites: B.S. degree in biology, chemistry, orrelated fields with B average or better and highG.R.E. score. U.S. citizenship required. Trainee-ships and assistantships available. Inquiries shouldbe submitted to: Dr. Sheldon Dray, Head, De-partient of Microbiology, Unierit of IllinoisMedical Center, P.O. Box 6998, Chicago, Illinois60680.

TWO POSITIONS(i) PLANT TAXONOMIST to teach planttaxonomy, economic botany, general plant science,maintain herbarium, and direct graduate researchin plant taxonomy. Ph.D. required. Assistant-associate professor, 9-month appointment. Salary:$11,500 to $14,500. (ii) BIOLOGIST to teachgeneral plant and animal science. Ph.D. required.Closing date: 30 May 1974. Assistant professor,9-month appointment. Salary: $11,160 to $12,500.Send curriculum vitae, bibliography, and completelist of references to: Harold E. Ward, Chairman,Department of Biological Sciences, Marshall Uni-versity, Huntington, West Virginia 25701.An equial opportunity affirnative action employer

POSTDOCTORAL POSITIONFor biochemist interested in lipid metabolism

and role of unsaturated fatty acids in membranes.Background in enzymology needed. Availablenow for about 2 years. Salary about $800 permonth. Send curriculum vitae and references to

M. A. WilliamsDepartment of Nutritional Sciences

University of CaliforniaBerkeley, Calif. 94720

An Eqtal Opportunity/Affirmative Action Employer

The Physics Department of the University ofCalifornia at Berkeley anticipates that a facultyposition will soon be open in experimental solidstate physics, and invites applications fromphysicists who combine specialist backgrounds inthe physics of semiconductors and modern ultra-violet and x-ray photoemission spectroscopy ofsolids. Candidates must possess the ability toconduct original research of significance. Applica-tions should be submitted to Professor MarvinCohen, Physics Department, University of Cali-fornia, Berkeley, California 94720, and should bereceived before 1 August 1974.Equal Opportunity/Affirmative Action Employer

RESEARCH ASSOCIATESHIPA position is available to investigate contractile

proteins in non-muscle cells. Experience in thisarea desirable but not absolutely necessary.Salary commensurate with experience and quali-fications. Send curriculum vitae and two lettersof recommendation to: Ashton Gibbons, Ph.D.,Director of Personnel, Worcester Foundation forExperimental Biology, Sbrewsbury, Mass. 01545.Inquires received after 30 June 1974 cannot beconsidered.Atn Equial Opportutnity/Affirmative Action Employer

SENIOR NEUROSCIENTISTThe Department of Zoology of the University

of Michigan wishes to appoint a senior levelneuroscientist, beginning 1975-76. The appoint-ment will be at professorial rank with teachingduties in the department. Research facilities willbe in the Neurosciences Building, an interdepart-mental unit currently housing members of severalother departments. Applicants should send a cur-riculum vitae, publications list, and the namesand address of five references, to: ProfessorStephen S. Easter, Jr., Department of Zoology,The University of Michigan, Ann Arbor, Mich.48104.A Nondiscriminatory, Affirmative-Action Employer

VISITING PROFESSORS WANTEDPolytechnic Institute of New York has pos-

sible I-year appointments in Biochemistry, Inor-ganic Chemistry, Organic Chemistry and Analyti-cal (Environmental) Chemistry for academic year1974-75, as replacements for faculty going onleave. Teaching duties may include some Gen-eral Chemistry in addition to your specialty.Applications at all academic ranks will be con-sidered. Applications from women and membersof minority groups are strongly encouraged. Sendr6sumes and three letters of recommendation toProf. Ephraim Banks, Head, Department ofChemistry, Polytechnic Insdtitte of New York,333 Jay St., Brooklyn, N.Y. 11201.

||||||"||||||||||||||FELLOWSM PS |||||||||||||||||||

PRE- AND POSTDOCTORAL FELLOWSHIPSPredoctoral fellowships in biochemistry with re-search on basic and health related problems avail-able 1974-75; chemistry or biology degree required.Postdoctoral fellowships in Clinical Biochemistryavailable 1 July 1974 for candidates with trainingin chemistry or biochemistry. Limited to U.S.citizens or permanent residents. Contact ThomasM. Devlin, Ph.D., Chainnan, Department of Bio-logical Chemistry, Hahnemann Medical College,230 North Broad St., Philadelphia, Pa. 19102.

926

LIMNOLOGISTFor 1-year postdoctoral fellowship, beginning

immediately. Project involves high-quality basicresearch on causes of blue-green algal blooms inClear Lake, California, and applications to con-trol nuisance blooms. Knowledge of modern lim-nological techniques required. Send curriculumvitae and references to Prof. A. J. Homne, Divi-sion of Sanitary Engineering, University ofCalifornia, Berkeley, Calif. 94720.

QUEEN'S FELLOWSHIPS INMARINE SCIENCE

To commemorate the Royal Visit to Australiain 1970 the Australian Government establishedthe Queen's Fellowships Scheme. Under thisscheme up to five fellowships may be awardedeach year for full-time research by young sci-entists of exceptional promise and provedcapacity for original work. These awards aretenable at the Australian Institute of MarineScience, Townsville, an Australian university orapproved research institution normally for 2years. Tenure of a Fellowship is expected tocommence within 9 months of the announcementof the award.

QUALIFICATIONS. Queen's Fellows shouldhave a Ph.D., or equivalent qualifications, orcquivalent research or professional experience,in a discipline applicable in marine science.Awards will, in general, be restricted to appli-cants who are not more than 30 years of ageon the date when applications close.STIPEND. $9,500 (Australian) per annum

increased to $10,250 per annum at age 28 years.

ALLOWANCES. Allowances are payable inrespect of a Fellow's wife ($500 per annum), eachdependent child ($200), superannuation payments(up to 10 percent of stipend), appropriate insur-ance coverage, and necessary travel expenses. Hostinstitutions are paid an allowance toward the costof setting up a Fellow and his research work.

APPLICATIONS. Persons interested in apply-ing for the above fellowships should obtain ap-plication forms and a statement of the condi-tions of award from the Secretary, Queen'sFellowships Committee, Department of Science,P.O. Box 449, Woden, AC., 2606, Australia;the Education Liaison Officer, Canberra House,Strand, London, W.C.2, England; or the ConsulGeneral, Australian Consulate-General, 636 FifthAvenue, New York, N.Y. 10020. Applicationsfor the next round of awards, which will be an-nounced in December 1974, close at the Can-berra address on 1 July 1974.

illlllllwlmllCOIFERENCE ||||||||11111"The First Annual National Conference on Bio-

medical Research Problems in a Changing Worldhas been held at the Sheraton Park in Washing-ton, D.C., on 5, 6, and 7 February 1974 spon-sored by the University of Maryland and Medi-Science, Inc. The latest developments andbreakthroughs in such strategic activity areas ofbiomedicine as Heart, Vascular and KidneyStudies; Cancer Studies, Prosthesis Developments,Instrumentation; Health Care Delivery and Bio-medical Ethics have been presented by the leadingscientists of the country. For a copy of theProceedings, send $10 to Conference, Medi-Science, Inc., P.O. Box 637, Laurel, Maryland20810.

CONFERENCE MANAGEMENTExpansion of Multi-Disciplined Conference

Division of small company welcomes opportuni-ties to plan, program, and implement all aspectsof running seminars, symposia, and conferencesin all areas of science. Successful track record.For handling your conference write Conference,

Medi-Science, Inc., Box 637, Laurel, Md. 20810,or phone (301) 6S2-4700.

IIIIDIIIIIEE MARKET PLACE liii,11MATHEMATICAL BIOLOGISTS

If you are an employer with a position inmathematical biology to fill, the Society forMathematical Biology will be happy to pass thisinformation to its members in the society news-letter without charge. Please send the informa-tion regarding the vacant position to Dr. GeorgeKarreman, Bockus Research Institute 19th andLombard Streets, Philadelphia, Pa. 19146.

SCIENCE, VOL. 184

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