Sunshine Recorder

Sunshine Recorder

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Usage conditions apply
Sunshine recorders determine the number of hours the sun is visible each day, and the time of that visibility. A differential recorder operates on the principle of the differential heating between a blackened bulb and a clear bulb of a differential thermometer. The form was suggested by Delos Taft Maring of the U.S. Weather Bureau and improved by Charles F. Marvin, also of the Weather Bureau.
The inscription on this example reads "Sunshine Recorder, Type ML20, Signal Corps, U.S. Army, Serial 15, Order 110429, Date 5-5-23."
Ref: D. T. Maring, “An Improved Sunshine Recorder,” Monthly Weather Review 125 (1897): 485-490.
C. F. Marvin, “Instructions for the Care and Management of Electrical Sunshine Recorders,” U.S. Weather Bureau Circular G (Washington, D.C., 1901), pp. 14-.
Currently not on view
Object Name
sunshine recorder
sunshine secorder
overall: 9 5/8 in x 7 3/4 in x 3 1/2 in; 24.4475 cm x 19.685 cm x 8.89 cm
ID Number
catalog number
accession number
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Medicine and Science: Physical Sciences
Data Source
National Museum of American History
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