Gambey Vertical Circle

Description
This is one of several instruments that the U. S. Coast Survey acquired from H. P. Gambey in Paris in the mid-1840s. It is heavy, stable, and precise. The circle itself is silvered, graduated to 5 minutes, and read by four verniers and magnifiers. The signature reads: "Gambey à Paris." The "U.S.C.&G.S. NO 37" inscription must have been added after 1878, when the Coast Survey became the Coast and Geodetic Survey.
Location
Currently not on view
date made
1840s
maker
Gambey, Henri Prudence
place made
France: Île-de-France, Paris
Measurements
telescope aperture: 2 in; 5.08 cm
telesope: 19 in; 48.26 cm
vertical circle: 12 in; 30.48 cm
overall: 21 3/4 in x 16 5/8 in x 13 1/2 in; 55.245 cm x 42.2275 cm x 34.29 cm
ID Number
PH.307208
accession number
65983
catalog number
307208
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History, Kenneth E. Behring Center

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