Measuring relative humidity by radio. Washington, D.C. June 9, Historic Reproduction

This rare historical print captures Measuring relative humidity by radio. Washington, D.C. June 9 in remarkable detail. Sourced directly from the Library of Congress, it represents an authentic piece of documented history.

Library of Congress record: Created 1937 June 9 Title from unverified caption data received with the Harris & Ewing Collection. Gift; Harris & Ewing, Inc. 1955. General information about the Harris & Ewing Collection is available at Measuring relative humidity by radio. Washington, D.C. June 9. The hair element for measuring relative humidity in radio weather sounding balloons has proved innacurate because of very slow response at the cold temperatures encountered in the upper atmosphere. F.W. Dunmore, Radio Engineer of National Bureau of Standards, has just developed a new device for the U.S.Navy which will overcome this effect and at the same time will not be affected in response by temperature. He is shown in the photograph observing a graph on.

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