Aneroid Barometer


This is a cylindrical instrument, 5.5 inches in diameter. The silvered face is marked “SIGNAL SERVICE U.S. ARMY / L. CASELLA / MAKER TO THE ADMIRALTY & ORDNANCE / LONDON / COMPENSATED / 2634 / ‘FOR ISSUE’ / NO 21.” The scale around the circumference of the face extends from 17 to 22 inches of mercury, graduated in tenths; another scale indicates altitudes from below 10,000 to above 15,000 feet.

This was probably made after 1870 when the Signal Service was charged with organizing a national weather service. And it was probably made before the establishment of the U.S. Weather Bureau, as a civilian agency, in 1890.

Date Made: circa 1856-1897circa 1870-18971870 - 1890

Maker: L. P. Casella

Location: Currently not on view

Place Made: United Kingdom: England, London

See more items in: Medicine and Science: Physical Sciences, Measuring & Mapping


Exhibition Location:

Credit Line: U.S. Weather Bureau

Data Source: National Museum of American History

Id Number: PH.314547Accession Number: 204612Catalog Number: 314547

Object Name: aneroid barometer

Measurements: overall: 5 1/2 in; 13.97 cmoverall: 6 3/4 in x 2 1/8 in x 5 3/4 in; 17.145 cm x 5.3975 cm x 14.605 cm


Record Id: nmah_1419863

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