Third Annual International Photography-In-Science SalonSource: The Scientific Monthly, Vol. 69, No. 5 (Nov., 1949), pp. 312-318Published by: American Association for the Advancement of ScienceStable URL: http://www.jstor.org/stable/19643 .

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THIRD ANNUAL INTERNATIONAL PHOTOGRAPHY-IN-SCIENCE SALON*

Prize winners in the Third International Photog- raphy-in-Science Salon, an annual competition for scientists and photographers, sponsored by THE

SCIENTIFIC MONTHLY and the Smithsonian Insti- tution, were announced on September 25.

Judges were Merle A. Tuve, of the Carnegie Institution, for the physical sciences; Walter F. Jeffers, of the Department of Botany, University of Maryland, for the biological sciences; A. A. Teeter, of Charles Pfizer & Co., New York City, for chemistry; Emanuel Krimsky, of Polyclinic Hospital, New York City, for the medical sciences; and Alexander. J. Wedderburn, of the Graphic Arts Division, Smithonsian Institution, for photog- raphy.

The 200 prints were on exhibition at the U. S. National Museum, October 3-3 1, and will be shown at the Annual Meeting of the AAAS, New York City, December 26-31. Afterwards the show will go on tour of important museums and scientific institutions in this country and abroad.

Prize winners in the Black-and-White Division: First: L. L. MARTON, Chief, Electron Physics

Section, National Bureau of Standards, Wash- ington, D. C.: "Electron-optical shadow method."

Second: BERNARD HENRY MOLLBERG, University of Houston, Houston, Texas: "Ventrosinistral view of dried chick embryo, plated with aluminum."

Third: S. B. NEWMAN, EMIL BORYSKO, and MAX SWERDLOW, National Bureau of Standards, Washington, D. C.: "Electron micrograph of thin section of cells in onion root tip."

Honorable Mention: JOSEi OITICICA, JR., Rio de Janeiro, Brazil (Guggenheim Fellow at the U. S. National Museum, Washington, D. C.): "Male genitalia, ventral view, of Citheronia mogya Schaus 1920 (Lepidoptera, Citheroniinae). CLYDE T. HOLLIDAY, Applied Physics Labora- tory, The Johns Hopkins University, Silver Spring, Maryland: "Cloud formations." (Photo- graph made from a V-2 rocket at White Sands.) T. G. ROCHOW, American Cyanamid Company, Stamford, Connecticut: "Commerical sample, tri-sodium orthophosphate ('TSP') ."

CHARLES J. SALAT, Armour Research Founda- tion, Chicago, Illinois: "Calibration of a ball bearing by means of optical flats." CLEE 0. WORDEN, Laboratory of C. A. Zapffe, Baltimore, Maryland: "Fractograph of piezo- electric single crystal." In the Color Division, the following won awards:

First: CHARLES D. OUGHTON and EUGENE C. RICKER, Battelle Memorial Institute, Columbus, Ohio: "Xerographic developing process."

Second: CHESTER F. REATHER, Carnegie Institu- tion, Baltimore, Maryland: "Implantation of twelve-day human ovum."

Third: THOMAS C. POULTER (third-time prize winner) and WALTER LAWTON, Stanford Re- search Institute, Stanford, California: "High- speed movies of colored meteorological balloons used with Poulter Seismic Method show inter- action of shock waves in the third dimension."

Honorable Mention: D. H. ROWLAND, Carnegie- Illinois Steel Corporation Research Laboratory, Pittsburgh, Pennsylvania: "Polished and etched cross section of experimental galvanized coating on low carbon steel." ROWLAND B. STRADLING, U. S. Cast Iron Pipe and Foundry Co., East Burlington, New Jersey: "Photomicrograph at 200 diameters of titanium nitride in cast iron." ALBERT C. WALKER, Bell Telephone Labora- tories, Murray Hill, New Jersey: "Quartz crystal grown at Bell Telephone Laboratories." Established to encourage and extend the use

of photography as a basic research tool, the con- test will be continued in 1950. All entrants shall be actively engaged in scientific research, and all photographs must be taken for scientific purposes. Entries may be sent to the Editor, The Scientific Monthly, 1515 Massachusetts Ave., N. W., Wash- ington 5, D. C., November 1-27, 1950. Prize-win- ning and other accepted entries will be shown at the Annual Meeting of the AAAS in Cleveland, Ohio, December 26-31, and at the U. S. National Museum, Washington, D. C., January 3-31, 1951.

* Prints in the 1949 Salon are booked through April 1950. Dates for showing these pictures may be arranged by writing to the Editor, THE SCIENTIFIC MONTHLY.

312

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November 1949, Volume I,XIX 313

First Prize went to L. L. Marton, clhief, Electron Physics Section, National Bureau of Standards,.for this illustration of the new electron-optical shadow technique, which makes it possible to photograph and study quantita'tively electro- static and magnetic fields of extremely small dimensions. Above: An analogous experiment in light optics. In the elec- tron-optical shadow method, the glass lens system is repl'aced by an electron lens, and the distorted plastic by a mag- netic or electric field. Below: Photograph of a typical pattern. Superposed on image of a magnetic recording wire is the electron shadow of a fine wire mesh placed just beyond the back focus of an electron lens. From the displacement and reduced magnification of a selected part of the mesh, the absolute value of the magnetic field intensity at a corre-

sponding point in the field can be accurately computed.

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Photomicrograph showing orientation structure of an annealed 70-30 nickel-copper alloy that had been deformed at room temperature. At the National Bureau of Standards it was found that the proper etching technique will produce an optically active film, which, when photographed under polarized light, will show variations in orientation. Print entered by D. H. Woodard, metallurgist,

National Bureau of Standards.

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Electronmicrograph of an extremely thin cross section of onion root tip in the zone of elongation, showing cell walls and nu- clei. Prepared for study by a new method in ultramiicrotomy recenitly developed at the National Bureau of Standards by S. B. Newman, Emil Borysko, and Max Swerd-

low. Awarded third prize.

Grenz ray picture of a rose. Part of an investigati,on to study plant nutrient move- ments. Entry from Herbert R. Isenburger, St. John X-Ray Laboratory, Califon, N. J.

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Q Oiticica, Jr., of the Museu Nacional, Rio de Janeiro, tempor- arily at the National Museum, Washington, D. C., under a Guggen- heim Fellowship, took this ventral view of the male genitalia of Citheronia mogya Schaus 1920 (Lepidoptera, Citheroniinae), which

won Honorable Mention in the Black and-White Division.

Among the interesting zoological subjects was this photograph of a firefly taken by its own flash. Submitted by A. :M. Win-

chester, of Stetson University.

This ventrosinistral view of a dried chick, embryo which has been plated with alu- minum won Second Prize for Bernard Henry Mollberg, of the University of Houston. The plating process reveals de- tails of surface anatomy that wouild other-

wise remain obscure.

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tee by W alter R Keagy Ji of Baittelle

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Poograp plrobviades gpermanent record of the calibration of a half-inch ball bearing. Honorable Mention awarded to Charles J. Salat, of Armour Research Foundation.

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inj ector of a V-2 rocket motorhe.topis. rin enerePbyLeoardTei tered by Walter R. Keagy, Jr.tel an Mare RederfofFaanferlAr

flats. Photograph provides permansnal'sPiteanDunnLabortory

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Hnrbemention went to Glee 0. Wor- 'den, of the Laboratory of C. A. Zapiffe, research metallurgist, Baltimore, for this

7 ~~~ f~ractograph of a piezoelectric single crys- tal. "Fractography" is a photographic technique that surmounts the long-stand- ing difficulties of observing jagged sur-

faces at high magnification.

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By means of a new photo-grid techniqu 1. developed at the National Bureau o Standards, plastic deformations in the .... .

vicinity of holes may be conveniently in- vestigated. Method involves use of a A master grid ruled with lines 0.015 mm. wide and nominally spaced 0 25 mm apart. 4~-;iii4ii Submitted by James A. Miller, metalluir- i-.~ ~--

gist, Chester I. Pope, chemist, and Ben- jamnin L. Page, physicist.

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