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Aneroid Barometer

Aneroid Barometer

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Description
The face of this cylindrical instrument is marked “HOLOSTERIC BAROMETER / COMPENSATED.” The additional circle with the letters “HBPN” was the logo of Naudet & Cie., and probably represents the words: Holosteric Barometer Paul Naudet. The firm was founded in Paris in 1860 by Paul Naudet, and used the term Holosteric to mean “without liquid." The scale around the edge of the silvered metallic dial extends from 28 to 31 inches of mercury and is graduated to hundredths of an inch. A blued needle indicates the present pressure; a brass needle indicates a previous observation.
The “U.S. Signal Service – 1101” inscription on the back of the case refers to the organization that became responsible for America’s national weather service in 1870. The U.S. Weather Bureau transferred this instrument to the Smithsonian in 1904.
Location
Currently not on view
Object Name
Naudet Aneroid Barometer
date made
ca. 1870-1890
maker
Naudet & Cie.
place made
France: Île-de-France, Paris
Measurements
overall: 4 1/4 in; 10.795 cm
overall: 5 3/8 in x 2 1/2 in x 4 7/8 in; 13.6525 cm x 6.35 cm x 12.3825 cm
ID Number
PH.230002
accession number
42625
catalog number
PH*230002
230002
Credit Line
U.S. Weather Bureau
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Data Source
National Museum of American History
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