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RED CROSS, AMERICAN. SANITARY RAILROAD CAR

RED CROSS, AMERICAN. SANITARY RAILROAD CAR

R. Davis of Bu. of Standards with camera for testing photographic materials, 61625

Washington, D.C. Working in machine shop at the Armstrong Technical High School

Man using microscope in laboratory

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R. Davis of Bu. of Standards with camera for testing photographic materials, [6/16/25]

R. Davis of Bu. of Standards with camera for testing photographic materials, 61625

R. Davis of Bu. of Standards with camera for testing photographic materials, 61625

Miss C.L. Larry testing radium, Bu. of Standards, 8/17/25

D.W. Kessler, Bu. of Standards testing granite and marble, 5/13/25

F.K. Hall, silk experiments, Bureau of Standards, 7/19/29

Test car, Bureau of Standards, 3/26/23

General view of experiment track, background and cameras

Bureau of Standards, testing concrete beams, 8/24/29

R. Davis of Bu. of Standards with camera for testing photographic materials, 6/16/25

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Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

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glass negatives davis standards camera materials library of congress
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Date

1925
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Source

Library of Congress
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Link

http://www.loc.gov/
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No known restrictions on publication.

label_outline Explore Standards, Camera, Materials

Production. Parachute making. There is far more to hemming this parachute than running the sewing machine. The operator must match pencil marks on the braid with pencil marks on the seams to turn out infallible parachutes for men in the Air Force. Pioneer Parachute Company, Manchester, Connecticut

Parke, Davis and Company, manufacturing chemists, Detroit, Michigan. Counting empty gelatin capsules

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World War I - American Red Cross

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Studying why fruits taste that way. E.K. Nelson of the Department of Agriculture is shown making tests with an apparatus which the Department imported from Germany for the purpose of studying the essential oils or "flavor-giving" content of fruits and vegetables. At present chemists are acquainted with the essential oils of only a few fruits, such as some of the citrus group. The apparatus is a vacuum distill which permits the distillation of liquids at temperatures much lower than usual by reducing the pressure, 1/10/31

Mr. Mack, this is Andy, He says he's handy

Chapayevsk collective Ukraine, USSR (Union of Soviet Socialist Republics). Collective farmer woman who is manager of the dairy farm checking the quality of the milk

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glass negatives davis standards camera materials library of congress