For sequencing and hybridization studies. Each lot testedenzymatical ly to insure biological activity.lodocytidine 5'-triphosphate,tetra (triethylammonium) salt, 5- (12sl]->1500Ci/mmolEthanol: water solution, 1:1, shipped in dry ice.NEX-073 $125/1 OO,uCi $240/500,uCi $420/1 mCilododeoxycytidine 5'-triphosphate,tetra (triethylammonium) salt, 5- [2SI]->900Ci/mmolEthanol: water solution, 1:1, shipped in dry ice.NEX-074 $ 100/1 OO,pCi $220/500,uCi $390/1 mCi

Also: lododeoxyuridine, 5_[12SI]_>2000Ci/mmol

New -England Nuclear549 Albany Street. Boston, Massachusetts 02118Customer Service 617-482-9595

NEN Canada Ltd Lachine. Quebec. NEN Chemicals GmbH. Dretetchenhain.W Germany

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iEdamuE~t is3^~~ ~ ~

Supercold Freezers* Complete line of supercold freezers Including up-

right, bench top and low profile chest models.* Frost resistant sealed and insulated inner doors on

upright models.* Chest models are countertop height for ease of

access.* Temperatures to -100°C; capacities to 23 cubic

feet.Write today for our descriptive literature on freezers,incubators, growth chambers, and environmentalrooms.Calumet is professional photographic equipment.Calumet Scientific also offers you the highest qualityprofessional photographic equipment at direct-from-the-factory savings.

I~~ ~ ~~-- New York$c1E1C ljrr-% t Suite 3502, Empire State Bldg.in<rit.finc~ ir-ic. 10001, 212/695-4780

Los Angeles1590 Toehy Ave., Elk Grove Village, III. 60007 434 North La Brea

312/439-9330 90036, 213/933-5735

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I * s z mS;

ELAPIDAECOMAS AND

ALLIESBungarus caeruheus ...................... P

Bungarus fasciatus ..................J...JBungarus ftlaviceps........................ TBungarus multicinctus ................. . NDendroaspis angusticeps ..............HDendroaspis jamesoni kaimosae JDendroaspis p. polytepis ...............LEbapsoideas. sundevaii ............t NHemachates haemachates ............DMicrurus corallinus.................... WMicrurus dumertliti .........W........... WMicrurus frontalis ......................... WMicrurus fulvius ............ ..............UMicrurusf .tenere ...........W......... ..WMicrurus n. nigrocinctus ..W.......... WMicrurus spixii obscurus .............WNaja h. haje (East Africa) ...............DNaja h. haie (South Africa) c..........CNaja h. annulifera (South Africa) ...D

Naja melanoloucaD....................... DNaja n. naja (Pakistan) ..................DNaja n. atra ......DNaja n. kaouthia ........................... DNaja n. oxiana ........................... HNaja n. samarensis ...............H........HNaja n. siamensis ..........................CNaja n. sputatrix ........... D.... ......D

Naja nigricollis DNaja nigricollis (West Africa) .........FNaja nigricollis pallida 0..................DNaja ntvea .............D..............D

Notechis scutatus ................. TOphiophagus hannah(Naja hannah) ............................. FOxyuranus scutellatus WPseudechis colletti ......T...... TPseudechis porphyriacus T............TPseudohaje nigroscens WPseudonaja t. textilis ........ ........... WWatterinnesia aegyptia ...............s.. T

HELODERMATIDAEBEADED LIZARDS

Heloderma horridum ..................... LHeloderma suspectum R..........-- R

BOIGINAEREAR FANGED SNAKES

Dispholidus typusLeptodeira ashmeadi rhombitera.. W

VIPERIDAETRUE VIPERS

Atractaspis c. congica ZBitis arietans ........................ CBitis caudalis RBitis gabonica ........................ HBitis g. rhinoceros ..... .................. JBitis nasicornis DCausus rhombeatus ..................... DCerastes cerastes ............ .......... TCerastes vipra ........................ TEchis carinatus sochureki ............. JEristicophis macmahonii ............ RPseudocerastes persicus ................ RVipera ammodytes...................... J

Vipera aspis ........... ............. TVipera berus ... T

V ipera r. russelliiVipera r. siamernsis c................... .. CVipera xanthina palestinae........... R

HYDROPHEIDAESEA SNAKES

Laticauda laticauda ...............s.... ZLaticauda semifasciata ....... W

CROTALIDAEPIT VIPERS

Agkistrodon acutus LAgkistrodon bilineatus.....F....... FAgkistrodon c. contortrix DAgkistrodon c. Iaticinctus........ EAgkistrodon c. mokason DAgkistrodon c. pictigaster ....... LAgkistrodon halys blomhofftii ....... DAgkistrodon p. piscivorus ....B.........BAgkistrodon p. leucostoma......s BAgkistrodon rhodostoma...s....Bothrops atternatus EBothrops atrox ....................... FBothrops b. bilineatus .. .................. NBothrops jararaca ....H................ HBothrops jararacussu ......... .......... JBothrops lansberg it.. A....... ............ RBothrops medusa RBothrops nasuta RBothrops n. nummitfer JBothrops schlogelii ... RCrotalus adamanteus ................. CCrotalus atrox ................. C

Crotalus c. cerastes ...................... HCrotalus d. durissus ... ....... ..FCrotalus d. terrificus (Colombia). FCrotalus d. territficus (S. Brazil).. HCrotalus d. totonacus ..... HCrotalus h. horridus CCrotalus h. atricaudatus DCrotalus molussus...... .ECrotalus ruber. ...... ....... DCrotalus scutullatus. ................ LCrotalus tigris ...... L

Crotalus v. viridis ...... HCrotalus v. abyssus ............... NCrotalus v. cerberus . FCrotalus v. helleri ........ ...-- JIr..... JCrotalus v tutosus .............- JCrotalus v. oreganus ..... ........... FLachesis muta TSistrurus catenatus tergeminus.....FSistrurus miliarus barbouri ............FTrimeresurus flavoviridis ...............FTrimeresurus mucrosquamatus .....NTrimeresurus okinavensis L......LTrimeresurus popeorum ........L.......LTrimeresurus p.purpureomaculatus JTrimeresurus wagleri ................t. P

FRACTIONS PURIFIEDCobratoxin $7 50per milltgramBungarotoxin s1000permilligram

/I Bungaroloxin $10 00 permilligram

Add $1 00 each tor multiple units otone milligram

Shipments F 0 B Air Miami

Expedient Dispatch

Will negotiate highvolume and/orlong range contracts.

NOTE SEND FORCOMPLETE LIST IF REQUIRED

Inquire for avaiiability of anunlisted species

U.S. DOLLAR PRICE SCHEDULE - EFFECTIVE JAN. 1,1976GM A B C D E F G H I J K L M N 0 P a1 00 35 00 40 00 50 00 60 00 70 00 80 00 90 00 100 00 125 00 150 00 175 00 200 00 225 00 250 00 275 00 300 00 350 00

50 19 25 22 00 27 50 33 00 38 50 44 00 4950 55 00 68 75 82 50 96 25 110 00 123 75 137 50 151 25 165 00 192 50

25 10 50 12 00 15 00 18 00 21 00 24 00 27 00 30 00 37 50 45 00 52 50 60 00 67 50 75 00 82 50 90 00 105 00

10 525 600 750 900 1050 1200 1350 1500 1875 2250 2625 3000 3375 3750 4125 4500 5250

R 400 S 450 T 500 U 600 V 800 W 1000 X 1200 V 1500 z 2000R through Z may be purchased proportionate to the 1 gram price in any quantity

DISCOUNTS* 1 - togmLIST tt30Igm -5% 31 60 gm -10 ||61 100 gm -15% gm -20 * UNASSORTED

FOR FRACTIONS SUBSTITUTE MILLIGRAMS FOR GRAMS

MIAMI SERPENTARIUM LABORATORIES - 12655 SOUTH DIXIE HIGHWAY * MIAMI, FLORIDA 33156, U.S.A.

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I

idr

SCIENCE, VOL. 1921266

POSITIONS WANTED

Anthropologst/Archeologist, Ph.D., bilingual (En-glish-Spanish) with 12 years of research experiencein Meso- and North America, publications; seeksmeaningful employment in museum, government,university, or private industry in North or LatinAmerica. Box 289, SCIENCE. X

BOSTON. Clerical Plus. Very bright person, degree,typing, biochemistry handicap. I can make it in theright position. Please write: Box 281, SCIENCE.

6/18, 25; 7/2

Editorial position desired. Doctorate in applied nucle-ar sciences. Specialized in the behavior ofnuclear re-lated trace elements in aquatic environment. Variedexperience in editorial work. Will accept free-lanceassignments. Box 290, SCIENCE. X

HPLC Applications Chemist. B.S. 1972. Seeks indus-trial position in QC, pharmaceuticals, or analyticalchemistry. Thorough knowledge ofamino acid analy-sis, NMR, HPLC. Wide experience in analysis of ra-diolabeled metabolites. LSC techniques. Publica-tions: AAA, HPLC, chemical synthesis. Box 291,SCIENCE. X

Meteorological Technician: A.A. and B.A. degrees.Will work for private sector or government. L. Baril,10840 SW 42 Street, Miami, Florida 33165. Tele-phone: 305-221-1340. X

NutritionistImmunologist. (Ph.D. August 1976). Cel-lular immune consequences of nutritional depriva-tion, especially perinatal deprivation. Also work onimmune status in lung carcinoma. Publications.Teaching experience. Seeks position in research/teaching. E. Williams, Massachusetts Institute ofTechnology, Room E18-670, Cambridge, Massachu-setts 02139. X

Foreign-born Scientist, with strong background in hy-drological and planktological investigations andmuch experience in work at sea and in lagoon andestuarine environments, seeks research or academicposition. Available around June 1976. Box 260, SCI-ENCE. X

18 JUNE 1976

POSITIONS OPEN

ACADEMIC PATHOLOGY: Positions available atall levels. Individuals should have experience in re-search and teaching. Inquiries or curriculum vitaeshould be directed to: Dr. James B. Caulfield, Depart-ment of Pathology, University of South CarolinaSchool of Medicine, Columbia, South Carolina 29208.The University of South Carolina offers Equal Op-portunity in its employment, admissions, and educa-tional activities in compliance with Title IX and oth-er civil rights laws.

ADJUNCT ASSISTANT PROFESSOR: Starting sala-ry approximately $16,000. Starting I July 1976, Re-quirements: Ph.D. and 1 or 2 years of postdoctoraltraining in gerontology and immunology including fa-miliarity with cell fractionation and cellular immuni-ty techniques, enzyme purification, radioactivecounting techniques including radioautography, andexperience with autopsy interpretation. Universityof California, Los Angeles, is an Equal OpportunitylAffirmative Action Employer interested in receivingapplications from minorities and women candidatesas well as other qualified people. Send curriculumvitae and three references to Dr. Roy L. Walford, De-partment of Pathology, University of California, LosAngeles, Calif. 90024.

The Department of Atmospheric Sciences of OregonState University invites applications for positions asASSISTANT PROFESSOR OF ATMOSPHERICSCIENCES. Preference will be given to candidateswith training and background in atmospheric dynam-ics and with a strong interest in climate modeling, al-though candidates with interests in related theo-retical, diagnostic, and observational areas will alsobe considered. These positions will involve bothteaching and graduate student supervision in the De-partment, as well as research responsibilities in con-nection with a developing program in climatic stud-ies. Appointments to these positions may be made inSeptember 1976 or later. Salary and appointment lev-el are negotiable, depending upon the applicant'sbackground and experience. Interested candidatesshould submit a complete resume (including curricu-lum vitae, education, experience, and publications)and request that three letters of recommendation besent before 1 July 1976 directly to:

Professor W. L. Gates, Chairman-DesignateDepartment of Atmospheric Sciences

Oregon State UniversityCorvallis, Oregon 97331

Oregon State University is an Affirmative ActionlEqual Opportunity Employer.

ASSISTANT PROFESSOR OFBIOENGINEERING

Candidates are being sought for a faculty position ofassistant professor in the College of Engineering andApplied Science. Candidates should have a Ph.D. ineither engineering or life sciences. Experience in ani-mal experimentation is a requirement. Applicantswill be expected to participate in teaching under-graduate and graduate engineering courses and toconduct research. The faculty member will have spe-cial responsibilities in setting up and directing aplanned animal facility for bioengineering researchand teaching. Send resumes to: Dr. Arthur E. Hum-phrey, Dean, Coliege of Engineering and Applied Sci-ence, University of Pennsylvania, Room 108 TowneBuilding/D3, Philadelphia, Pa. 19174. An Equal Op-portunitylAffirmative Action Employer.

The University of California, Berkeley, has anopening, in the Department of Mechanical Engineer-ing, at the ASSISTANT PROFESSOR level for teach-ing and research in the general area of thermal sys-tems. Applicant should have a strong academic back-ground in heat transfer, thermodynamics, and fluidmechanics. Send biography and the names of refer-ences to: Chafrman, Department of Mechanical Engi-neering, University of California, Berkeley, Califor-nia 94720. The University ofCalifornia is an Affirma-tive Action and Equal Opportunity Employer, andminority and women candidates are urged to apply.

ASSISTANT PROFESSOR OFPHARMACOLOGY

(CARDIOVASCULAR PHARMACOLOGY)Applications are invited for a faculty position at

the assistant professorship level. The candidateshould have a Ph.D. (or equivalent) degree in phar-macology. The area of specialization should be incardiovascular pharmacology. Up to 2 years of expe-rience in teaching and/or research beyond the doctor-ate is desirable. Pharmacy background preferred.The selected candidate will be responsible for teach-ing cardiovascular physiology and pharmacology atthe undergraduate professional level. Preference willbe given to those who are well versed in the quan-titative aspects of cardiovascular dynamics and arewilling to actively participate and supervise pre-doctoral research. Development of independent re-search in the area of cardiovascular pharmacologywill be strongly encouraged. Applicants should sub-mit curriculum vitae including complete bibliogra-phy and names and addresses of four individuals forreference, no later than 30 June 1976, to Dr. B. N.Dixit, Department of Pharmacology, University ofPittsburgh School of Pharmacy, 1100 Salk Hall, Pitts-burgh, Pennsylvania 15261.Equal OpportunitylAffirmative Action Employer

Onondaga Community College expects to have thefollowing full-time faculty positions in fall 1976: BI-OLOGY: assistant professor to teach general andcell biology and human physiology; assistant profes-sor to teach general biology and ecology or anatomyand physiology. Should be prepared to team-teach abiological issues course for nonscience majors. M.S.and college teaching experience required. Send re-sumes to Christina Oates, Chairperson, Biology De-partment, Onondaga Community Colege, Syracuse,New York 13215. An Equal OpportunitylAffirmativeAction Employer.

BOTANIST (terrestrial plant ecologist): Research-oriented individual to participate in an inter-disciplinary research program in upland ecology inrelation to Chesapeake Bay. Requires extensive ex-perience in terrestrial plant ecology, academic andresearch experience in descriptive or populationplant ecology, and research and writing ability asdemonstrated by publications. Supervisory andgroup research experience and experience with phys-iological or dynamic plant ecology desirable. Salary:$19,386 per year. Send applications to SmithsonianInsitution, Office of Personnel Administration, Room1471, 900 Jefferson Drive, SW, Desk 500, Washing-ton, D.C. 20560. Equal Opportunity Employer.

CARDIOVASCULAR PHYSIOLOGIST-Facultyopening for individual with an M.D./Ph.D. degree.Two years of postdoctoral experience is desirable.Excellent teaching and research opportunity. Salaryand professional rank are open. Address inquiries toJ. E. Whitney, Chirman, Department of Physiology,The University of Arkansas for Medical Sciences,Little Rock, Arkansas 72201. The University is anEqual OpportunitylAffirmative Action Employer.

CELLULAR IMMUNOLOGISTVIROLOGIST

The Department of Microbiology has two openingsfor assistant professors, one with research interest inthe area of cellular immunology and another workingin an area of latent viral infections. Please send cur-riculum vitae and three letters of reference to AlvarA. Werder, Chairman, Department of Microbiology,University of Kansas Medical Center, Kansas City,Kansas 66103. The University ofKansas is an EqualOpportunity Employer.

1267

Personnel

PlacementOnly those employers and individuals who do not dis-

criminate on the basis of race, sex, religion, age, color,or national origin should submit Personnel Placementadvertising.

POSMONS WANTED: 40¢ per word; use of BoxNumber counts as 10 additional words. Minimumcharge $10. Prepayment required. This rate applies toindividuals only; personnel agencies, companies, col-leges, and universities take display rate for all advertis-ing.

DISPLAY (POSMONS OPEN, MARKET PLACE,AND SO FORTH): $130 per inch, minimum, per in-sertion (1 inch is equivalent to 12 lines of 48 characterseach). Ads over 1 inch billed to nearest quarter inch.No charge for Box Number. Rates net. No agency com-mission allowed for ads under 4 inches. No cash dis-count. Prepayment required for foreign advertising.Purchase orders and billing information must accom-pany all other advertising.

COPY for ads must reach SCIENCE by Wednesday,3-1/2 weeks before issue date (Friday of each week)requested. Send copy for all positions wanted ads anddisplay ads under 5 inches to:

SCIENCE, Room 2071515 Massachusetts Ave., NW

Washington, D.C. 20005

Send copy for display ads, 1/6 page and larger, to:

Scherwo Associates, Inc.II West 42nd StreetNew York, N.Y. 10036

BLIND AD replies should be addressed as follows:

Box (give number)SCIENCE

1515 Maaachuaets Ave., NWWashington, D.C. 20005

BIOPHYSICISTParticipate in research program on lipo-protein structure and metabolism with spe-cial emphasis on development of methodsfor isolation of apoproteins. Knowledge ofprotein methodology required. Combinationof training and experience equivalent toPh.D. in biochemistry or physiology withbasic knowledge of immunological tech-niques preferred. Send resumes to

Dorita CrosbyLawrence Berkeley Laboratory

University of CaliforniaBerkeley, Calfornia 94720

An Equal Opportunity Employer, MIF

POSITIONS OPEN

POSITIONS OPEN

CARDIOVASCULAR PHYSIOLOGISTAssistant professor (Ph.D. and/or M.D.) with inter-ests in cardiovascular research in conscious and un-conscious animals to collaborate with a fullyequipped laboratory studying myocardial ischemiain basic science department in a large medical cen-ter. Send curriculum vitae and two letters of refer-ence to Box 288, SCIENCE.

UNIVERSITY OF CALIFORNIA, IRVINESCHOOL OF BIOLOGICAL SCIENCES

CHAIR, ECOLOGY ANDEVOLUTIONARY BIOLOGY

A position is now available for an appointment at thefull professor level as chair in the Department ofEcology and Evolutionary Biology in the School ofBiological Sciences at the University of California,Irvine. Candidates must have an active research pro-gram. Marine biology or ecological energetics arepreferred, although individuals in other areas of ecol-ogy and evolutionary biology will be considered.Candidates should submit curriculum vitae particu-lars as soon as possible to Dean Howard A. Schnei-derman, School of Biological Sciences, University ofCalifornia, Irvine, Irvine, Calfornia 92717. Applica-tions from all qualified candidates are welcome; mi-norities and women are encouraged to apply.

CHAIRMANFOR DEPARTMENT OF BIOSTATISTICS

GRADUATE SCHOOL OF PUBLIC HEALTHUNIVERSITY OF PITTSBURGH

Must have expertise and demonstrated leadershipin theoretical and applied statistics in the biologi-cal field, with a special interest in health and medi-cal care. A doctorate degree is required with provencapacity as a teacher, research worker, and adminis-trator. Also required is a demonstrated capacity forparticipation in cooperative teaching and researchprograms involving multidisciplinary and multi-organizational relationships. Experience with largeinvestigative studies in industrial populations consid-ered an asset. Salary commensurate with experi-ence.

Direct inquiries to Dr. John C. Cutler, ChairmanSearch Committee, Graduate School of Public Health,University of Pittsburgh, Pittsburgh, Pennsylvania15261.An Equal OpportunitylAffirmative Action Employer

COMEPARATIVE ANIMAL PHYSIOLOGISTResearch position available in the field of arctic

and subarctic environmental physiology and/or bio-chemistry at the assistant or associate professor lev-el. Applicants must have the Ph.D. degree and pref-erence will be given for postdoctoral arctic or antarc-tic research experience. The successful candidatewill be expected to participate in independent and co-operative research programs with other faculty andstudents, to assist in graduate student training, andto develop the majority of his support through acqui-sition of grants and contracts. Extensive potentialexists for research into both the basic physiologicaland biochemical mechanisms of adaptation to thenorthern aquatic and terrestrial environment and in-to the impact of resource development on organismsin Alaska. The Institute is interested in com-plementing current expertise in homeotherm physi-ology by increased emphasis on physiological andbiochemical studies of either aquatic or terrestrialpoikilotherms.

Applicants should send curriculum vitae, reprintsof publications, transcripts of scholastic record, anda statement of their specific research interests asthese relate to northern problems to Dr. George C.West, Institute of Arctic Biology, University ofAlaska, Fairbanks, Alaska 99701. Three letters of rec-ommendation must also be provided.An Affirmative ActionlEqual Opportunity Employer

GENETICIST, Ph.D., for studies of biological ef-fects of magnetic fields and environmental pollu-tants. Team effort with biologists and biophysicists.Experience with Drosophila preferred. Positionavailable about October 1976. Contact Dr. John W.Baum, Safety and Environmental Protection Division,Brookhaven National Laboratory, Associated Univer-sities, Inc., Upton, Long Island, N.Y. 11973.

An Equal Opportunity Employer, MIF

CROP ECOLOGIST/PHYSIOLOGISTCandidate should be an experienced ecologist(Ph.D.) with strong capability in plant physiology.Experience should include modeling crop responsesto environmental stimuli, as well as practical experi-ence in greenhouse operations and experimental de-sign.Position is available immediately at Columbus. Ex-cellent career development opportunities and com-petitive salary and benefits compensation. Send re-sume to

Dr. W. T. LawbonBattelie

Columbus Laboratories505 King Avenue

Columbus, Ohio 43201An Equal Opportunity Employer

DEAN-GRADUATE/RESEARCH SCHOOLNominations and applications are invited for the

position of Dean of the Rosenstiel School of Marineand Atmospheric Science, University of Miami.The School is one of the major centers for re-

search and graduate education in a rapidly evolvingfield. The Dean is expected to provide active lead-ership in the School's continued scientific and finan-cial development. We are looking for a person withan earned doctorate in the sciences, with a record ofscholarly achievement, and with administrative ex-perience, preferably in an American university envi-ronment. The candidate should be capable of devel-oping and coordinating major national and inter-national marine-oriented research and of attractingeconomic support from private as well as state andfederal sources.

Responses should be submitted in writing to Dr.Walter Diing, Chalrman, Search Committee, Rosen-stiel School of Marine and Atmospheric Science, Uni-versity of Miami, 4600 Rickenbacker Causeway, Mi-ami, Florida 33149, and received no later than 31 Oc-tober 1976.A private, independent, international University;

an Equal Opportunity and Affirmative Action Em-ployer.

DIRECTORMARINE SCIENCE CENTER

Oregon State University invites applications fromqualified individuals for the position of director ofthe Marine Science Center in Newport, Oregon.Candidates should possess a doctoral degree andshould have significant experience in marine sci-ence. The successful applicant should have adminis-trative experience and scholarly achievements inteaching and research. He/she should possess an ap-titude for developing educational and basic/appliedresearch programs, as well as the ability to workwith a variety of scientists and administrators from abroad range of disciplines. Director will have facultyrank in an appropriate academic department. Appli-cations including a curriculum vitae will be accepteduntil 15 August.

Send to:John V. Byrne, Chairman

Marine Science Center Search Committeec/o School ofOceanographyOregon State UniversityCorvallis, Oregon 97331

Oregon State University is an Equal OpportunitylAffirmative Action Employer

FACULTY POSITION AVAILABLEA faculty position is available at the Freshwater Bio-logical Institute in the College of Biological Sciencesof the University of Minnesota. Applicants shouldhave a Ph.D. and several years of experience in re-search in phycology, with special emphasis on algalnutrition, physiology, and ultrastructure. Theyshould be able to demonstrate through published re-search that they have made significant contributionsto science. It is anticipated that the position will befilled at the assistant professor level, but the possi-bility of hiring at a higher rank exists. The academicappointment will be held in the Department of Bot-any and that department will have the responsibilityfor the assignment of teaching duties. Applicationsshould be sent to Dr. John M. Wood, Freshwater Bio-logical Insttute, P.O. Box 100, Navarre, Minn.55392.An Equal OpportunitylAffirmative Action Employer

1268

ELECTRON MICROSCOPISTThe Cell Research Institute of the University of Tex-as at Austin is seeking an individual to take charge ofthe operation and upgrading of its electron microsco-py laboratory. The individual should be an accom-plished electron microscopist with both TEM andSEM experience. Applicants with established repu-tations are preferred. Depending upon qualificationsand academic experience, the position will, as thebudget permits, be either half time in the Instituteand half time in one of the science departments or,for the immediate future, full time in the Institute. Ineither case rank and salary will depend upon experi-ence. For more information write W. GordonWhaley, Director, The Cell Research Institute, TheUniversity of Texas at Austin, Austin, Texas 78712.An Equal OpportunitylAffirmative Action Employer.

ENZYMOLOGISTSThree postdoctoral positions available after I June1976. Studies on enzymes pyruvate kinase, PEP car-boxylase, or choline acetyltransferase. One- to 3-year appointments. Send resumes to

Dr. Larry Cottam (Pyruvate kinase)Dr. Louis Hersh (Choline acetyltransferase)

Dr. Thomas Smith (PEP carboxylase)Department of Biochemistry, University of TexasHealth Sciences Center, 5323 Harry Hines Boulevard,Dalas, Texas 75235.

An Equal Opportunity Employer

DEPARTMENT OF SURGERYUNIVERSITY OF IOWACOLLEGE OF MEDICINEIOWA CITY, IOWA52242

Faculty positions for M.D.'s with special qualifica-dions in fields of transplant, immunology, oncology,trauma, shock and resuscitation, burns, surgical nu-trition, gastrointestinal physiology, plastic surgery,vascular surgery, pediatric surgery, thoracic and car-diovascular surgery, and neurosurgery. Immunol-ogist qualified in research immunology, oncology,and immunogenetics.Inquiries and applications should be directed to S. E.Zilffren, M.D., Professor and Head. An Equal Oppor-tunity Employer.

HEAD OF SECTION, CLINICAL CHEMISTRY.Established clinical chemist with demonstrated ad-ministrative ability is sought to lead a section con-sisting of ten clinical chemists directing 125 para-medical personnel. The high-volume, automated lab-oratories support both hospital and ambulatorymedical practice, and are located in a new buildingdesigned specifically for a comprehensive Depart-ment of Laboratory Medicine. Teaching, continuingeducation, developmental investigation, and publica-tion are encouraged; faculty appointment to MayoMedical School available. Send curriculum vitae andthe names of three references to Chainnan, Chem-istry Search Committee, Mayo Clinic, Rochester, Min-nesota 55901. An Equal OpportunitylAffirmative Ac-tion Employer.

POSTDOCTORAL POSITIONS open in a programon physiology and biochemistry of the eye. Areas in-clude membrane physiology and biochemistry, visu-al pigment and vitamin A biochemistry, retina andelectrophysiology and ultrastructure. Requirementsare Ph.D., M.D., or equivalent, U.S. citizenship orpermanent resident status. Program offers good start-ing levels, $1000 for travel, tuition fees, laboratorysupplies, and maximum of 3 years in program.Write, sending curriculum vitae and area of interest,to: Dr. J. A. Zadunaisky, Director, Training Pro-gram, Department of Physiology, New York Universi-t Medkal Center, 550 First Avenue, New York, N.Y.10016.

POSTDOCTORAL POSMON for biochemist or or-ganic chemist qualified for research on combinationof solid-phase synthetic peptides with natural pep-tides to form semisynthetic analogs of proteins. Ad-ditional information on request. Send resume andtwo letters ofrecommendation to:

Paul WarmeAthouse Laboratory

Pensylvania State UniverityUniversity Park, Pa. 16802

An Equal Opportunity/Affirmative Action Employer

SCIENCE, VOL. 192

POSITIONS OPEN POSITIONS OPEN

POSITIONS OPEN

SCHOOL OF OPTOMETRYINDIANA UNIVERSITY

The following faculty positions are available: anato-mist to teach human anatomy and an advancedcourse in ocular anatomy; physiologist to teach hu-man physiology and vegetative ocular physiology;pharmacologist to teach pharmacology and systemicpathology. Rank and salary dependent upon qualifi-cations. For further information write Chairman,Search and Screen Committee, School of Optometry,Indiana University, Bloomington, Indiana 47401. AnEqual OpportunitylAffirmative Action Employer.

POSTDOCTORAL POSITION. Research in ex-cellently equipped laboratory. (i) Regulation of geneexpression of arginine biosynthetic regulon ofEsche-richia coli in vitro transcription, translation; plas-mids; RNA and DNA sequence determination;study of interaction of repressor, corepressor, andRNA polymerase with control region. (ii) RNA tu-mor virology, development of in vitro studies of tran-scription, translation, and regulation. Send curricu-lum vitae to

Dr. Eric JamesDepartment of Chemistry

University of South CarolinaColumbia, S.C. 29208

The University ofSouith Carolina is an Equal Oppor-tunity Employer.

Ft FERMENTATION R & D

Microbiology Section

POSITIONS OPEN

PATHOLOGISTCHAIRPERSON OR HEAD

DEPARTMENT OF PATHOLOGYPosition available at the Peoria School of Medicine,one of the three clinical schools within the Universi-ty of Illinois College of Medicine. Applicants mustbe graduates of an approved medical school, Board-certified in one of the boards of pathology, licensedor eligible for licensure in the State of Illinois, andhave experience in administration, teaching, and/orresearch. Duties include the development of pro-grams in undergraduate, graduate, and continuingeducation in pathology; the recruitment of faculty tomeet the needs of the department; the developmentof an effective relationship with the clinical faculty;the support of research and other scholarly activitiesof the department; and representing the Departmentof Pathology to the Dean and other departments. Sal-ary and academic rank will be commensurate withexperience and qualifications. The position is avail-able at present. Starting date to be negotiated. Inter-ested persons should send their curriculum vitae to:

Dr. F. J. Grundbacher, ChairmanPathology Search CommitteePeoria School of Medicine1400 West Main StreetPeoria, Illinois 61606

Applications will be accepted until 15 August 1976.The University of Illinois is an Affirmative ActionlEqual Opportunity Employer and encourages appli-cations from members of minority groups and wom-en.

POSTDOCTORAL RESEARCH ASSOCIATE.Starting August to October 1976. Salary $10,500.Neurochemistry of calcium-binding proteins. Train-ing in or experience in protein chemistry or enzy-mology required. Send curriculum vitae and two let-ters of recommendation to Dr. Frank L. Siegel, Neu-rochemistry Section, Waisman Center, University ofWisconsin, Madison, Wisconsin 53706.

An Equal Opportunity Employer

11Manager

Expanding fermentation-based R&D activitieshave resulted in an exceptional opportunityfor an emerging scientist manager. We arelooking for a PhD microbiologist to assumeresponsibility for managing interdisciplinaryresearch teams, including microbial geneti-cists and physiologists. The person we seekhas had four or more years of industrial ex-perience including a period of project leader-ship. If you have been waiting for an oppor-tunity to manage a research program, and ifyou would like to associate yourself with acompany committed to a broad range of fer-mentation R&D projects, including organicacids and antibiotics, send us your resumeand salary history.In addition to an exciting work environment,Pfizer offers a very com,petitive compensationand benefit package as well as an opportunityto live in an attractive shore community.Address inquiries to: Mr. F. G. Ziegler, PfizerCentral Research, Eastern Point Rd., Groton,Connecticut 06340.

An equal opportunityemployer, m/f

PROGRAM EVALUATIONCHILD HEALTH

Three-year project at the Public Health, Education,and Kennedy schools to develop interdisciplinaryevaluation of the effectiveness of school health andservices for handicapped children; to establish inter-school programs in teaching, student field experi-ences, and research in community child health eval-uation; disseminate research findings to commu-nities studied and to policy- and decision-makers.Flint, Michigan, will be one of the sites; of the twoyet to be selected, one will be in the Boston area.We are seeking to fill three faculty positions at thistime:I) PROJECT DIRECTOR. Senior faculty position,strong background in ambulatory health services re-search and/or evaluation research and administra-tive experience in similar settings. Strong skills inquantitative methods are desirable.

2) CLINICIAN with interest in school health and/orhandicapped children. We will consider two half-time persons, one in each of these areas with half-time clinical appointment possible at Children's Hos-pital Medical Center. Background in health servicesor evaluation research required.

3) JUNIOR FACULTY/RESEARCH ASSOCIATE.Strong background in community organization (espe-cially health services, education, or child welfare).Practical experience in community health care deliv-ery or planning desirable.

A wide range of disciplines will be considered: soci-ology, anthropology, public health, social psycholo-gy, educational policy research, social evaluationand measurement, and organizational behavior. Pre-vious experience in community-based service or re-search highly desirable.

Please send curriculum vitae to:

Robert J. Haggerty, M.D., ChairmanDepartment of Health ServicesHarvard School of Public Health

677 Huntington Avenue, Room 302Boston, Massachusetts 02115

Minority (including handicapped) and women can-didates are particularly encouraged to apply.

18 JUNE 1976

POSTDOCTORAL POSITIONS-Severalpostdoctoral positions available in HPLC.Previous experience in chromatography de-sirable. Projects include development of au-tomative instrumentation, organic derivatiza-tion and cleanup procedures, and biochemi-cal analysis. Available immediately or fall.Send a resume to Dr. Barry L. Karger, Direc-tor of Chemical Analysis, Applications and Fo-rensic Science, Northeastern University, 360Huntington Avenue, Boston, Mass. 02115. AnEqual OpportunitylAffirmative Action Em-ployer.

rPHARMACOKINETICISTRESEARCH CHEMISTPHARMACOLOGIST

The National Institute of Environmental Health Sciences,National Institutes of Health, Public Health Service, De-partment of Health, Education, and Welfare, invites ap-plications for a Pharmacokineticist/Research Chemist/Pharmacologist to study the disposition of environmentalpollutants in mammalian species, correlate pharmaco-kinetic studies with toxicity studies, and extrapolate re-sults obtained with laboratory animals to man. The posi-tion will be located in the Pharmacology Branch, NIEHS,in the Research Triangle Park (equidistant from Raleigh,Durham and Chapel Hill) North Carolina.A Ph.D. or equivalent in Pharmaceutics, Biopharmaceu-tics, Pharmacy, Pharmacokinetics, Biochemistry, Pharma-cology, or a related field with previous training and/orresearch experience in Pharmacokinetics is required. If theappointment is made under the Staff Fellowship or VisitingProgram, the appointment will be initially for one or twoyears and may be extended. Persons considered for careerCivil Service positions must be referred through the U. S.Civil Service Commission procedures. Salary will rangefrom $15,000 to $29,500 per annum, depending on quali-fications. Letters of application with curriculum vitae, bib-liography, and the names and addresses of two referencesshould be mailed to:

Ms. Penelope P. GardnerNIEHS Personnel OfficeP. 0. Box 12233Research Triangle Park, N. C. 27709

Letters must be received by July 9, 1976 to be considered.An Equal Opportunity EmployerI NOPF"O

1269

POSITIONS OPEN

PHYSIOLOGY AND BIOPHYSICS-assistant pro-fessor. Ph.D. and/or M.D. in physiology, biophys-ics, or related disciplines. Postdoctoral experiencepreferred. Some teaching and research experience,preferably in a medical school. Evidence of active re-search ability and productivity is necessary. Re-search program in cardiovascular pulmonary physi-ology are of interest. Successful applicant is ex-pected to conduct independent research programand guide graduate students. Teaching responsibili-ties include team-tatight medical, dental, and nursingcourses. The individual should be able to effectivelyteach areas other than the primary research area.Salary approximately $17,000. Persons interested inthis position should send a curriculum vitae andthree letters of reference to: Thomas B. Calhoon,Ph.D., Professor and Chairman, Department of Physi-ology and Biophysics, University of Louisville, Schoolof Medicine, Health Sciences Center, Louisville, Ken-tucky 40201. The University of Louisville is an Af-firmative ActionlEqual Opportunity Employer.

UNIVERSITY OF ZURICHDEPARTMENT OF PHARMACOLOGY AND

BIOCHEMISTRYPOSTDOCTORAL RESEARCH POSITION

(BIOCHEMIST, MOLECULAR ORCELL BIOLOGIST)

Applications are invited for a postdoctoral assign-ment involving work on molecular and cellular as-pects of the central nervous system.Applicants should preferably have a strong back-ground in nucleic acid research. The appointment,which is for 1 year in the first instance but may beprolonged for up to 3 years, is available immediate-ly. Salary is in the range SFr 32,000 to 48,000 peryear. Swiss citizenship required.Applications should be sent as soon as possible toPD Dr. C. C. Kuenzle, Department of Pharmacologyand Biochemistry, Winterthurerstrasse 260, CH-8057Zurich, Switzerland.

RADIOCIHEMIST. Applications invited for the posi-tion of postdoctoral research associate. Work in-volves cosmochemistry and neutron activation anal-ysis of meteorites. Applicants should have strongbackground in trace element analysis using radio-chemical techniques, preferably with two or moreyears of experience beyond the Ph.D. Send resumeto L. Grossman, Department of Geophysical Sciences,University of Chicago, 5734 South Ellis Avenue, Chi-cago, Illinols 60637. The University of Chicago is anEqual Opportunity Employer.

RESEARCH NUTRITIONIST, Nutrient CompositionLaboratory, Nutrition Institute, Agricultural Re-search Service, U.S. Department of Agriculture(USDA).Challenging position in a new laboratory in the US-DA for an innovative creative scientist with a broad-based experience in foods and nutrition. An under-standing of nutrient analysis, problems in human nu-trition, food availability patterns, and food consump-tion practices is required. Duties include research onthe design of sampling systems based on the food dis-tribution system of the United States to ensure thatrepresentative food samples are selected for nutrientanalysis. Additional collaborative research on the ef-fects of various food processing and handling proce-dures on nutrient content is desired. Doctoral degreein nutrition, food chemistry, or related field pre-ferred. Salary $16,255 (GS-11) to $34,916 (GS-14) de-pending on qualifications and experience. Please sub-mit resume or Civil Service Standard Form 171 toRose Cunningham, Agricultural Research Service,U.S. Department of Agriculture, Room 101, Building003, BARC-West, Beltsville, Maryland 20705. Tele-phone: 301-344-3402.

The University of Wisconsin-Center for Health Sci:ences, Department of Medicinre, Madison, Wiscon-sin, has two research positions available immediate-ly. Applicants must be outstanding researchchemists with experience in radioimmunoassay, orPh.D.-level training or experience in inorganic chem-istry or chemical engineering with an interest in het-erogeneous catalysis. Send resume to Dr. Stuart Up-dike, Department of Medicine, 1300 University Ave-nue, Madison, Wisonsin 53706. Salary commen-surate with training and experience.An Equal OpportunitylAffirmative Action Employer

1270

POSITIONS OPEN

EDUCATION DEPARTMENT OFWESTERN AUSTRALIATECHNICAL EDUCATION

DIVISIONSENIOR LECTURER/LECTURERSIN ENVIRONMENTAL HEALTH

Applications are invited for permanentor temporary positions (optional) atBentley Technical School for teaching tothe diploma level.Requirements: Relevant academic stud-ies to the diploma or degree level withextensive experience in the field of en-vironmental health. Teaching experi-ence and qualifications are desirablebut not essential. Membership in a rele-vant professional organization is an ad-vantage.

Salary: Senior Lecturer-A$ 17,704;Lecturer-A$10,323 to A$15,064.Salary and level of initial appointmentdependent on qualifications and experi-ence.

Written applications, closing onFriday, 6 August 1976, should be sentto:

Director of Technical Education36 Parliament Place

West Perth, W.A. 6005Australia

TOXICOLOGYDIRECTOR

Not-for-profit contract research Institute seeks di-rector of toxicology to develop the Institute's tox-icological evaluation capabilities, assist its biomedi-cal devices development work with medical schoolsand with industry, and train staff in toxicologicalscreening of chemicals, including volatile com-pounds administered both by gavage and inhalation.Applicant must be experienced in laboratory animalresponse in both acute and chronic experimentalprograms. Ph.D. in toxicology or pharmacology pre-ferred; biochemistry or physiology acceptable withsufficient toxicology experience. This position re-quires an experienced research manager, with recog-nized professional expertise, who can take charge.

SENIORTOXICOLOGIST

Not-for-profit contract research Institute seeks expe-rienced toxicologist as principal investigator of amultimillion dollar carcinogenesis bioassay pro-gram. Principal investigator will supervise a team ofchemists, veterinarians, and pathologists.Applicant must be experienced in laboratory animalresponse in both acute and chronic experimentalprograms. Ph.D. level in toxicology or pharmacolo-gy preferred. Master's degree level in toxicology orpharmacology or Ph.D. in biochemistry or physi-ology acceptable with sufficient toxicology experi-ence.Salary open. Familiarity with the South helpful.Please send resume to:Personnel Manager, Gulf South Re-search Institute, 7700 GSRI Avenue,Baton Rouge, Louisiana 70808.

An Equal Opportunity Employer.

TUMOR VIROLOGISTResearch position available for RNA tumor virolo-gist. Primary appointment will be as an assistantmember in the Fred Hutchinson Cancer ResearchCenter, with ajoint appointment as a research assist-ant professor in the Department of Microbiology,University of Washington. Applicants should havepostdoctoral experience in the area of tumor virol-ogy. Applicants should send curriculum vitae, a sum-mary of research interests, and three references to:Dr. R. Nowinskd, Fred Hutchinson Cancer ResearchCenter, 1124 Columbia Street, Seattle, Washington98104. An Equal OpportunitylAffirmative Action Em-ployer.

POSITIONS OPEN

POSTDOCTORAL POSMON-Individual with arecent Ph.D., for immediately available position car-rying the title of research instructor. Training and/orexperience in microbial biochemistry/physiologywith an interest in electron microscope desirable.Send detailed resume to Dr. M. L. Higgins, Depart-ment of Microbiology and Immunology, Temple Uni-versity School of Medicine, Philadelphia, Pa. 19140.An Equal OpportunitylAffirmative Action Employer.

The University of California, Irvine, College of Med-icine, has POSTDOCTORAL RESEARCH POSI-TIONS available in the Department of MedicalMicrobiology, in the areas of virology, immunology;regulation of mammalian cell growth, enzyme regula-tion in bacteria and mammalian cells, and develop-ment, genetics, and nucleic acid metabolism ofbacteria. Applicants must have a Ph.D. and a back-ground in the quantitative aspects of biochemistry,microbiology, or genetics. Applications from allqualified candidates are welcomed; minorities andwomen are encouraged to apply. Interested indi-viduals should write: Chairman, Department of Medi-cal MIcrobiology, College of Medidne, University ofCalfornia, Irvine, Calf. 92717.

RESEARCH ASSOCIATEPostdoctoral position in reproductive biology. Back-ground in cell biology, biochemistry, immunology,or electron microscopy helpful. Address inquiriesto:

Professor Mildred GordonAnatomical Sciences

State University ofNew York at BuffaloBuffalo, New York 14204

An Equal Opportunity Employer

TOXICOLOGISTCandidate sought having Ph.D. in toxicology/phar-macology; assistant professorship. Direct testingand research program in newly established laborato-ry. Reply to Harold C. Hodge, Ph.D. Department ofPharmacology, University of California, San Fran-cisco, California 94143.

VISUAL PSYCHOPHYSICSEye Research Institute of Retina Foundation in-

tends to hire a permanent staff member specializingin psychophysics to begin work in late 1976 or early1977. The candidate should be well versed in quan-titative psychophysical techniques and should be in-terested in the physical and physiological bases of vi-sual performance. The most important criterion isexcellence in quality of research, but two other fac-tors will be weighed: (i) The candidate should be in-terested in having contact with patients and supervis-ing clinical measurements taken on patients by otherworkers. The position is meant to be filled by some-one who can act as an informed adviser in the devel-opment of new clinical techniques. This activity willrequire a time commitment of 1 day per week. (ii)The successful candidate should be sufficiently ad-vanced to initiate and pursue his or her own indepen-dent program of research and compete successfullyfor grant funds. Seed money for the initial period willbe provided from institutional funds to allow the psy-chophysics research program to start immediately.

Send curriculum vitae and names of references to:Director

Department of Retina ResearchEye Research Institute of Retina Foundation

20 Staniford StreetBoston, Massachusetts 02114

FELLOWSHIPS

PREDOCTORAL FELLOWSHIPS: A limited num-ber of graduate student stipends ($5100 per year) re-main available for September 1976 to highly quali-fied students interested in an interdisciplinary pro-gram in molecular cell biology. Faculty of over 40has research interests in: animal virology, bacterialand cellular genetics, cancer biology, cellular immu-nology, membrane pathology, connective tissue me-tabolism, dental research, infectious disease, andstructural biochemistry. Contact immediately: Direc-tor of Graduate Studies, Department of Microbiology,University of Alabama in Birming Medical Cen-ter, Birmnhm, Alabam 35294.An Equal OpportunitylAffirmative Action Employer

SCIENCE, VOL. 192

For trulyeconomical fluorescence, think Zeiss.Zeiss thought about fluorescence when de-

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Besides the broad range of objectives-all free of auto-fluorescence-you'll appreciate the complete filter packages,including highly efficient dichromatic reflectors and interfer-ence filters that provide superb fluorescence contrast for allpresently used fluorochromes. You'll like, too, the variety oflight sources and condensers, and the unique specimen stagewith elevated slide holder to prevent messy oil seepage.

This exploded view shows the Standard equipped with

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What's more, Zeiss thought about what trueeconomy means.

The Standard, with its easy-to-add accessories for allmicroscope techniques, is a real workhorse, with the breedingof a thoroughbred. That's why you'll find it hard at work incost-conscious clinical and research laboratories everywhere.

Get all the details. Send today for our brochure. "ZeissFluorescence Microscope System."

Nationwide Service.

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