Public domain
Untitled photo, possibly related to: G.T. Hemmeter, chief of the mechanical engineering section of the engineering and development division, sets one of the automatic recording thermometers used on tunnel dryer which he designed for dehydrating vegetables. Regional agricultural research laboratory,
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Credit lineUntitled photo, possibly related to: G.T. Hemmeter, chief of the mechanical engineering section of the engineering and development division, sets one of the automatic recording thermometers used on tu. 1942-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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