Aneroid Barometer

Aneroid Barometer

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This small instrument, the size of a pocket watch, was probably made for the French market. The inscription on the silvered face reads “L. Casella / Maker to the Admiralty / & Ordnance / LONDON / Compensated / 2311.” The outer scale around the edge of the face indicates altitude in “Mètres.” The inner scale indicates pressure from 63 to 70 centimeters of mercury, subdivided to half millimeters; another scale indicates altitudes from 300 feet below sea level to 15,000 feet above. A curved thermometer reads from -12 to +55 degrees centigrade. There is also a leather carrying case.
Ref.: L. Casella, Improved Aneroid Barometers (London, 188?).
Currently not on view
Object Name
barometer, aneroid
date made
L. P. Casella
place made
United Kingdom: England, London
overall: 1 13/16 in; 4.572 cm
overall in case: 1 1/4 in x 2 3/8 in; 3.175 cm x 6.0325 cm
ID Number
accession number
catalog number
Credit Line
Philip Squire Sampson
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Medicine and Science: Physical Sciences
Measuring & Mapping
Data Source
National Museum of American History
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