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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

Harris & Ewing · 1931-01-01 · photo, print, drawing

From the collection of Library of Congress. Free to download, adapt and use — no permission needed.

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glass negativesunited states
Credit lineTests 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 . 1931-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.
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