J. & H. J. Green Minimum Thermometer

Description
This is an alcohol-in-glass Rutherford-type thermometer. The back of the stem is milk glass. The clear front is marked "J. & H. J. Green. N.Y." and "Signal Service U.S. Army No. 14" and graduated every degree Fahrenheit from -90 to +135. It was made between 1879 and 1885 (when James Green worked in partnership with his nephew Henry).
John Rutherford, a Scottish country doctor, devised this form in 1790. Green stated in 1900 that it was "the only one in general use." It has a black index inside the tube. "On a decrease of temperature the alcohol recedes, taking with it the glass index; on an increase of temperature the alcohol alone ascends the tube, leaving the end of the index farthest from the bulb indicating the minimum temperature."
Ref.: Henry J. Green, Meteorological and Scientific Instruments (Brooklyn, 1900), p. 23.
Location
Currently not on view
Object Name
thermometer
date made
1879-1885
maker
J. & H. J. Green
Measurements
overall: 12 in; 30.48 cm
place made
United States: New York, New York
ID Number
PH*317467
accession number
230396
catalog number
317467
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

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