Kodak reports to' laboratories on:a thin photorecording paper...help in photographing a black cat in a coalbinat midnight...a chemical for the assay of thyroxine

Linagraph 482Our trade-mark "Linagraph" is ap-plied to certain of our photographicpapers and films which do their bitfor progress by delivering crisp,black-line oscillograph traces onclean backgrounds. Time was whenwe beat the drum heavily for theversatility and virtually unlimitedfrequency response of photographicoscillography and the desirability ofkeeping consistent oscillographicrecords for future engineering ref-erence. Then we came to realizethat we were belaboring the obvi-ous. The various oscillographs onthe market are able to speak verycreditably for themselves. We'll con-centrate on continuing to squeezeimprovements out of the photo-graphic paper and film for them.

In pursuance of this policy, wenow draw to your attention the newKodak Linagraph 482 Paper, whichhas an extra thin, yet exceedinglydurable paper base that makes iteasier to get the best photocopies ofyour recordings and any pen or pen-cil notations they may have ac-quired. Furthermore, the crispnessand blackness of the traces and thewhiteness of the background arenowise dependent on cooling theprocessing solutions. Any tempera-ture below 120 F will do.

The new paper is available from mostoscillograph manufacturers andfrom allKodak Industrial Dealers in many widthsanid spoolings. Ifyou'd like iniformationon how to make photocopies from it,write Eastman Kodak Companiy, Indus-trial Photographic Division, Rochester4, N. Y.

Intense developmentCall us peculiar if you will. Here forbetter than half a dozen years wehave had a means of doubling effec-tive emulsion speed by merely add-ing something to the developer andyet we've made precious little noiseabout it. This is not diffidence butreluctance to set off a trend thatmight in the long run prove inimical

to beautiful photography. The gainin sensitivity is not without cost inloss of definition, high base fog, andemphasis on fingerprints, abrasionmarks, etc.But perhaps our attitude has been

too stuffy. One of the major news-picture organizations, though rarelyfaced with photographing a black

cat in a coalbin at midnight, hasbeen accepting help from "SolutionA" on difficult night shots. Sincethe results are good enough forthem, they're probably good enoughfor others who find that the mostsensitive films still need to besqueezed a little occasionally.We have no desire to enshroud

"Solution A" in mystery. Its in-gredients are hydrazine dihydro-chloride, which promotes develop-ment of some silver halide grainsthat have not actually absorbed lightphotons, and 6-nitrobenzimidazolenitrate, an anti-foggant. When 30cc of it is thoroughly mixed intoone liter of the familiar Kodak De-veloper D-19, you have Kodak De-veloper SD-19a. Develop conven-tional high speed negative materialsin this at 75 F for 8 to 12 minuteswith intermittent agitation. Bestspeed increase is generally found ata development time that gives abase fog around 0.40.Any Kodak dealer can order for you

Kodak Solution A for Kodak Devel-oper SD-19a. (He'd better write itdown just that way!) A quart costs$2.65. It is specifically designedfor usewith Kodak Developer D-J9 and noother.

Sulfa for thyroxineThere's a curious relationship-ofno physiological significance we'resure-that links the sulfa drugs withthyroxine: several of the former,diazotized, make good colorimetricreagents for the latter. This was dis-covered in 1947 by some folks inMelbourne, Australia, who felt theneed of an alternative chemical as-say for the tetraiodo amino acid thatis the active principle of the thyroidgland. They tried a large numberof amines, looking for one whichcould be easily diazotized, produceda strongly colored product whenreacted with thyroxine, and wasreadily soluble in n-butanol. Fromthe favorable behavior of the sulfadrugs in the trials, they took a leadand finally fixed on N',N'-Diethyl-sulfanilamide. They wrote a good,comprehensive paper on this workand published it in The BiochemicalJournal (42, 475(1948)). There, forall we knew of it, it languished untila call the other day from the Mon-treal office ofone ofour distributors.We have a large number of such

distributors scattered from Atlantato Zurich. They are very helpful topeople who prefer, at no extra cost,to do their business with a humanface rather than with a squiggle atthe bottom of a letter or a squawkfrom a telephone. In this case theman in Montreal had a friend whowanted to know if we could makesome N1,N'-Diethylsulfanilamide.We could. Thus was born Eastman6900 and an abstract of how to useit in the assay of thyroxine.Eastman 6900 costs'a dollar a gram;

the abstract is free. For either, both, ora copy of our catalog that lists morethani 3500 Eastman Organic Chemicals,write to Distillatio,i Products Indus-tries, Eastman Organic Chemicals De-partment, Rochester 3,N. Y. (Divisioni of East- nman Kodak Company).

Prices are subject to changewithout notice.

This is one of a series of reports on the many productsand services with which the Eastman Kodak Company andits divisions are . . serving laboratories everywhere

SCIENCE IN ALASKA, 1951Proceedings of the Second Alaskan Science

ConferencePublished by the Alaska Division, AAAS

360 pp., 6 x 94- inches, Paper, Plastic Spiral Binding .... $3.00

This important volume offers a broad coverage of Alaskan scientific work.The introductory papers include Governor Gruening's political analysis and re-views of biology (Wiggins), medicine (Schiller), social science (Skarland), andphysical science (Reed). The contributed papers that follow report research andanalyze problems in thoughtful detail. Those in Agriculture, Botany, Forestry em-phasize dairying, soil and land use, agricultural economics, forestry, and ecology.Medicine, Physiology, Public Health include nutrition, effects of cold on organ-isms and basic animal mechanism for adaptation to arctic conditions and Alaskanhealth problems, Engineering, Industrial Science, Aviation and Geology, Geog-raphy spotlight mining, permafrost, and petroleum. In Sociology, Economics,Education and Anthropology Eskimo and Indian studies are most numerous.Drawing heavily on the Geophysical Institute of the University of Alaska, Geo-physics, Meteorology, Oceanography form a substantial section of highly signi-ficant papers. Wildlife, Zoology stress ecological and conservation problems.

Send orders for Science in Alaska, 1951 to:

Dr. Troy L. Pewe, SecretaryAlaska Division, AAASBox 4004, College, Alaska

My check or money order for $ .......... is enclosed for.copies of Sciencein Alaska, 1951 at $3.00 per copy.

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ANNUML REVIEW

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NUCLEAR SCIENCE

VOLUME 3

OFF THE PRESS:

December 1, 1953

PUBLISHED BY:

Annual Reviews, Inc. in co-

operation with the NationalResearch Council of the Na-tional Academy of Sciences.

PRICE:$7.00 per copy, postpaid

""The possibility, afforded by 'Annual Reviews' ofmaintaining contact with most aspects of a broadfield on an almost current basis, makes this publi-cation one of the most useful in scientific literature."Journal of Chemical Education, July, 1953.

Prepared and published under the supervision of the Com-mittee on Nuclear Science of the National Research Councilof the National Academy of Science.

EDITOR: James G. Beckerley

ASSOCIATE EDITORS: Martin D. Kamen, Donald F.Mastick, and Leonard I. Schiff.

EDITORIAL COMMITTEE: C. D. Coryell, L. F. Curtiss,L. I. Schiff, E. Segre, and R. E. Zirlde.

CONTENTS: Reactions of a-Mesons with Nucleons, E. M. Henley, M. A. Ruder-man, and J. Steinberger; Mesons and Heavy and Unstable Particles in CosmicRays, L. Leprince-Ringuet; Extranuclear Interactions of Electrons and GammaRays, D. R. Corson and A. 0. Hanson; Neutron Optics, D. J. Hughes; The Stand-ardization of Neutron Measurements, A. Wattenberg; Photographic Emulsions,Y. Goldschmidt-Clermont; Radiation Chemistry, J. L. Magee; Chemical Effectsof Nuclear Transformations, J. E. Willard; Separation Techniques Used in Radio-chemistry, P. C. Stevenson and H. G. Hicks; Isotope Effects in Chemical Reactions,P. E. Yankwich; Radiation Dosimetry and Protection, L. D. Marinelli; VertebrateRadiobiology: Embryology, R. Rugh; Vertebrate Radiobiology: Histopathologyand Carcinogenesis, J. Furth and A. C. Upton; Cellular Radiobiology, A. H.Sparrow and F. Forro, Jr.; Practical Aspects of Radiation Injury, L. H. Hempel-mann and J. G. Hoffman.

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(a) Pharmacologist; experienced anticonvulsants, hypotensivedrugs, anticholinergies; M.D. preferred; Ph.D. eligible; dutiestesting new drugs; capable organizer required. (b) Physiologistqualified teach genetics and possibly other branches of zoology;full time academic appointment; small university, Midwest; rankdependent upon qualifications. (c) Physiologist; interesting oppor-tunity; pharmaceutical company; slight preference one interestedcardiovascular research. (d) Biochemist or microbiologist; fulltime research, agricultural college; East. (e) Ph.D. in clinicalpsychology to become associated with neuropsychiatrist, DiplomateAmerican Board; duties: office practice, industrial psychologicaltesting; Pacific Coast. S12-2 Science Department, MedicalBureau (Burneice Larson, Director) Palmolive Building, Chicago.

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GET YOUR ADVANCE COPYof the General Program-Directoryof the Boston Meeting of the AAAS

By first class mail - early in DecemberThe General Program-Directory of the 120th Meeting of the AAAS in Boston, December 26-31,

1953, will be available to anyone, at cost, within the first week in December-whether he can attendthe Meeting or not. You will want the General Program-Directory for your reference shelf.

Program content Directory content

1. The General Symposia: "Species Which Feed Man- 1. AAAS officers and staff for 1953.kind" and "The Sea Frontier."

2. Programs of the 18 AAAS sections and subsections 2. Complete roll of AAAS presidents and their fields.

(symposia and contributed papers). 3. The 245 affiliated organizations.

3. Programs of the more than 40 participating societies. 4. Historical sketch and organization of the Associa-4. The Special Sessions: AAAS, Academy Conference, tion-and the new Constitution and Bylaws.

Conference on Scientific Editorial Problems II, Con- .Pference on Scientific Manpower III, British AAS 5National Geographic Society, Phi Beta Kappa, 6. AAAS Awards and Grants-including all pastRESA., Sigma Xi. winners.

5. Details of the Mechanics Building and downtown 7. Membership figures by sections.hotels.

6. Titles of the latest foreign and domestic scientific 8. Section committees (Council members) in detail.films to be shown in the AAAS Science Theatre. 9. Local committees.

7. Exhibitors in the 1953 Annual Exposition of Scienceand Industry and descriptions of their exhibits. 10. Future Meetings of the AAAS-through 1958.

Advance RegistrationAdvance registration has these decided advantages: 1) You avoid delay at Registration Desks upon arrival;

2)You receive the General Program-Directory in ample time, unhurriedly, to decide among events and sessions youparticularly wish to attend; 3)Your name is posted in the Visible Directory as the Meeting opens.

The following coupon may be used both by advance registrants and by those who wish onlythe advance copy of the General Program-Directory.

--- THIS IS YOUR COUPON FOR AN ADVANCE COPY OF THE GENERAL PROGRAM-DIRECTORY---

1 a. fO Enclosed is $2.50 for my advance Registration Fee which brings me the Program-Directory, ConventionBadge, and all privileges of the Meeting.

lb. E Enclosed is $1.50 for only the Program-Directory. (It is understood that, if I should attend the Meetinglater, the Badge-which is necessary for all privileges of the Meeting-will be secured for $1.00 more.)

(Check one)

2. FULL NAME (Dr., Miss, etc.) ...................................................................(Please print or typewrite) (Last) (First) (Initial)

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Please mail this Coupon and your check or money order for $2.50 or $1.50 to theAMERICAN ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE

1515 Massachusetts Avenue, N.W., Washington 5, D. C.16 CEC Vl1116 SCIE,NCE Vol. 118

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