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Tests cold effects on airplanes. Donald Brooks, Automotive Engineer of the Bureau of Standards, examining the valves of the apparatus known as the humidifier, which enables Bureau experts to test the effect of cold upon airplanes

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Tests cold effects on airplanes. Donald Brooks, Automotive Engineer of the Bureau of Standards, examining the valves of the apparatus known as the humidifier, which enables Bureau experts to test the effect of cold upon airplanes

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Public domain photograph of people in office, interior, the 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

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glass negatives

automotive engineer

library of congress

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Date

01/01/1931

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Harris & Ewing, photographer

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38.88868, -77.00472

Google Map of 38.888684, -77.00471900000002

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Library of Congress

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http://www.loc.gov/

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