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* Write today for more information on these and other Shimadzu instruments.SHIMADZU SCIENTIFIC INSTRUMENTS, INC.9147 Red Branch Road, Columbia, Md 21045. U.S.A. Phone (301)997-1227 Fax (301)730-1290

. Li C LA| * K SA 7~ | |SHIMADZU (EUROPA) GMBHE l U * *vu * - - U AckerStrasse 111, 4000 Dusseldorf, F .R. Germany Phone (0211) 666371 Telex 08586839

E _ W_ SCIENTIFIC INSTRUMENTS, INC. SHIMADZU CORPORATION INTERNATIONAL MARKETING DIV.Shinjuku-Mitsui Building, 1-1, Nishishinjuku 2-chome, ShinjukuL-ku, Tokyo 160. JapanPhone Tokyo 03-346-5641 Telex: 0232-3291 SHMDT J.

Circle No. 90 on Readers' Service Card4 MARCH 1983 1()19

Model 35192010 cubic feetSolid-State Automatic Multi-Model' Incubator0 to 20% C02 2-stage system

PUSH OUR BUTTONS,

SLAM OUR DOORS,TWIST OUR DIALS.

You're invited to subject our incubatorsto your roughest examination. Becausewe're confident they can take it.We've built our 75-year reputation onbuilding controlled environmentalequipment that's solidly-built to perform.Week in, week out. And keep on per-forming long after most competitiveequipment has gone down for the lasttime.Take our mechanical convection Multi-Mode® C02 incubators, for example.They're solid performers, for sure. Con-structed of rugged stainless steel inside

and out, they're simple to operate andoffer many exclusive features to makeyour work easier.Like our Multi-Mode® control systemwith three independently-circuited,solid-state modules for digital set andeasy-to-read LED display of tempera-ture, humidity and CO2.Like our unique built-in automatic 2-stage injection system for rapid C02recovery after repeated door openings.And our "dry bottoms" that eliminateinternal reservoirs-a major source ofcontamination, a major chore to clean.

Plus our convenient one-step automaticdecontamination cycle.

Hotpack produces more varieties ofmechanical convection incubators thanany other manufacturer. All are quality-built and available with a multitude ofoptions and accessories.

We'd welcome your microscopic exami-nation of our line. Just give us a call tollfree at 800-523-3608, in Pennsylvania,call 215 - 824-1700. Or write HotpackCorporation, 10940 Dutton Road, Phila-delphia, PA 19154.

WE BUILD EQUIPMENT TO WORK.OUR 0TH ANNIVERSARY

Circle No. 305 on Readers' Service Card

10214 MARCH 1983

T P

For Environmental Achievement

Inviting Nominations for the 1984 Tyler PrizeYou are invited to nominate individuals or institutions of any nation.

The John and Alice Tyler Ecology-Energy Fund has awarded the Tyler Prize annuallysince I973 for achievements protecting, maintaining, improving and

understanding ecological and environmental conditions anywhere in the world.In 1980 selection criteria were broadened to encompass the

discovery, further development, or understanding of known sources ofenergy, and of new sources of energy.

Eleven environmental laureates have received Awards for their outstandingachievements benefiting mankind. The Prizes have

totaled over $i million, ranging from $I50,000 to $200,000 annually

Please provide all of thefollowing: nominee's vita or resume;summary of accomplishment(s); detailed description of contribution(s);

2 or 3 examples of publications or other evidence of contribution(s); three lettersof reference; and, names of 3 to 5 additional references. Nominations must be

received no later than October 15, I983. Supporting material must bereceived no later than November I, I983.

MAIL TO: Executive DirectorThe Tyler Prize

University of Southern CaliforniaLos Angeles, CA 90089-4019, USA

THE WORLD PRIZE IN ECOLOGY AND ENERGY1026 SCIENCE, VOL. 219

FORTODAY'S FACULTYAND COLLEGE STAFFMEMBERS* FROM 18TO 80.

Whether you're thinking rtirement

or not,revie,w the plan that p,rovidesforcash withdrawal and/ora life:timeIncome.

TIAA-CREF Supplemental Retirement Annuities(SRAs) offer you substantial flexibility including cashwithdrawal and/or lifetime retirement income. Youcan even reduce your income taxes now!

You can begin contributions to an SRA at any ageand begin benefits at any age up to age 71 unless youare still employed (then you can delay beginningbenefits until age 80). For example, you could startcontributions at age 25, and choose to begin benefitsor withdraw cash at age 34, 40 or 50, regardless ofyour employment status.

Get your money at any time.You can receive benefits as a lifetime income or over afixed period of from 2 to 10 years. What's more, if youneed it (even while employed by your currentemployer), you can withdraw all the money you haveaccumulated by surrendering your contracts. Or, youcan withdraw $1,000 or more every six months. Thereis never a cash surrender charge.

Contributions are tax-deferred,so you pay less income taxes now.

The federal income tax on your contributions isdeferred until they are paid to you as benefits. So, youpay less tax now.

Changing employers? Take SRAs with you.Since you own your Supplemental Retirement Annui-ties, you take them with you if you leave your currentemployer. You can make contributions through anyinstitution that makes Supplemental RetirementAnnuittes available to staff members. Contributionscan be as little as $25 a month.

Full information.Complete and mail the coupon for an SRA InformationKit today. You'll get full details about all the advan-tages SRAs have to offer, why this plan suits so manyfinancial situations and age groups and how muchyou may contribute to the plan.

*TIAA-CREF provides annuities and other services for employees ofcolleges, universities, private schools and certain other nonprofittax-exempt educational and research institutions.

HELP YOURSELF TO A BRIGHTER FINANCIAL FUTURE...SEND FOR A FREE INFORMATION KIT.

Us;

I Teachers Insurance andI Annuity Association ofI America-College Retirement

Equities FundI 730 Third AvenueI New York, N.Y. 10017

Please send me full details ..about TIAA-CREF Supplemen-tal Retirement Annuities, theflexible tax-deferred annuity plan that offers the opportunity to accumu-late funds for additional retirement income and the option for cashwithdrawal.

Nzmto

City

State Zip Date of Birth

NJamnf nctiti tinnI Name .ol institution IPlease let us know if you are participating in a TIAA-CREF retirement plan I

L at your institution. -YES NO____________________~~S383

4 MARCH 1983 1131

ThE ULTIMATE IN ION-SELECTIVEMEASUREMENTS

WPrS FD 223DUAL/DIFFERENTIALELECTROMETER

* input resistance 1015 n . leakage current 1014 A* input capacitance 0.1 pF * LCD readout* differential readings * independent, simultaneous

readings

FD223 puts first-stage amplification close tothe source with an active probe headstageminimizing noise pick up and signal loss.

FD223 DUAL/DIFFERENTIAL ELECTROMETER.... the ultimate for precision measurements fromion-selective and pH macro- and microelectrodes.

Only offered by

60 Fitch Street * P.O. Box 3110 * New Haven, Conn.06515 U.S.A. Tel.: (203) 389-2183 - Cables: WPINSTR*TWX: 710-465-2638

Circle No. 282 on Readers' Service Card

PUBLIC FORUM ON NUCLEAR POWERSponsored by the Three Mile Island

Public Health Fund*March 28, 29 and 30, 1983

Penn State University Capitol CampusMlddletown, Pennsylvania

Free and open to the general public. Registration not re-quired. All sessions include a period of open discussion inwhich questions may be asked.Monday, March 28thWelcoming Address by David Berger, Liaison Counsel

8:45 a.m.Session k-Concerns Related to Nuclear Power

9:00 a.m. to 12:30 p.m.Dean Abrahamson, M.D. Ph.D., University of Minnesota,Moderator

Roger Kasperson, Ph.D., Clark University"Public Perceptions of Nuclear Power"

Bernd Franke, Ph.D., Senior Research Scientist, HeidelbergGermany"Power Plant Siting Criteria"

Karl Z. Morgan, Ph.D., Appalachian State University"Radiation Exposures in the Nuclear Cycle"

Session Il-Health Effects of Low Level Radiation Exposure1:45 to 5:30 p.m.Edward P. Radford, M.D., U. of Pittsburgh, ModeratorArthur Upton, M.D., New York University

"Experimental Evidence of Low-Dose Effects"Alice M. Stewart, M.D., Birmingham University, England

"Factors Modifying Cancer Risks At Low Doses"Hiro Kato, M.D., Radiation Effects Research Foundation, Japan

"Current Evidence in A-Bomb Survivors"Tuesday, March 29thSession 11-Problems in Occupation Exposure to Radiation

8:45 a.m. to 12:15 p.m.Karl Z. Morgan, Ph.D., Appalachian State University,Moderator

Bo Lindell, Ph.D., Past President Int'l. Commission ofRadiation Protection"Current Concepts of Occupational Exposure Limits"

David Gee, General and Municipal Workers Union,England"Occupational Radiation Risks from Workers Point ofView"

Edward P. Radford, M.D., U. of Pittsburgh"Radiation Risks in Workers"

Session IV-Expert Credibility and Public Concerns1:45 p.m. to 6:00 p.m.

Ian McHarg, Professor, U. of Pennsylvania, ModeratorRobert Holt, Ph.D., New York University"Human Stress at TMI and Other Reactor Regions"

James Hurst, resident of Middletown, Pa."Public Concerns in TMI Area"

Frank von Hippell, Ph.D., Princeton University"Scienlific Credibility and Public Policy"

Wednesday, March 30thSession V-Planning for Nuclear Emergencies

6:00 p.m. to 9:00 p.m.Frank von Hippel, Ph.D., Princeton University, ModeratorLee Thomas, Deputy Administrator, FEMA

"Regulatory Requirements"Jan Beyea, Ph.D., National Audubon Society

"Public Involvement in Planning"George Woodwell, Ph.D., Ecosystems Center, Marine

Biological Lab"Lessons from TMI Episode"

*The Three Mile Island Public Health Fund was established as part of aclass-aclion setlement in behalf of persons who live, work and dobusiness within a 25-mile radius of the site of the 1979 nuclear accident.The purpose of the Health Fund is to help protect those persons fromdetrimental consequences as a result of the accident and the contin-ued operation of the nuclear power facility. The fund is administered byDavid Berger, plaintiffs liaison counsel, subject to the supervision ofJudge Sylvia H. Rambo of the U.S. District Court, Middle District, Pennsyl-vania. For further information, write to Mr. Jonathan Berger, ExecutiveSecretary, Three Mile Island Public Health Fund, 1622 Locust St., Philadel-phia, Pa. 19103.

L