Green Mercury Barometer

Description
When Joseph Henry decided to organize a weather service under the auspices of the Smithsonian Institution, he commissioned James Green to make instruments suitable for distribution around the country. This portable barometer, marked "Smithsonian Inst'n, Jas. Green, N.Y. 358," may be one of that sort. And it may have been made in 1849, shortly after Green moved from Baltimore to New York.
This example has a sliding vernier operated by a head screw at the top of the tube, a Fahrenheit thermometer in the side of the tube, and a thumb screw that adjusts the volume of the cistern.
Ref.: Smithsonian Institution Annual Report for the Year 1850, p. 17.
Location
Currently not on view
Object Name
barometer, mercury
date made
ca 1849
maker
Green, James
Physical Description
brass (overall material)
iron (overall material)
Measurements
overall: 37 in x 2 in; 93.98 cm x 5.08 cm
ID Number
PH*224424
catalog number
224424
accession number
42137
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Barometers
Data Source
National Museum of American History, Kenneth E. Behring Center

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