H. J. Green Sling Psychrometer

This instrument consists of two mercury-in-glass thermometers mounted on an aluminum frame that is marked "H. J. GREEN B'KLYN N.Y." and "No. 117 SIGNAL CORPS. U.S. ARMY" and equipped with a wooden handle. Each thermometer has a milk-white back and a clear front that is graduated every degree Fahrenheit. On one the scale runs from -37 to +127; on the other it runs from -32 to +128. It was made between 1890 (when Green moved his business to Brooklyn) and 1923 (when the psychrometer came to the Smithsonian).
Ref.: Henry J. Green, Meteorological and Scientific Instruments (Brooklyn, about 1890), p.31.
Currently not on view
Object Name
sling psychrometer
date made
H. J. Green
place made
United States: New York, Brooklyn
ID Number
accession number
catalog number
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Thermometers and Hygrometers
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
U.S. Signal Corps

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