Repeating Circle

Repeating Circle

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Description
The circle is silvered, graduated to 5 minutes, and read by 4 verniers with magnifiers. A tag on the box indicates that it was used by the U.S. Topographical Bureau, as the mapping branch of the Army Engineers was known at that time. The "Gambey a Paris" inscription is that of Henri Prudence Gambey (1787–1847), the foremost maker of precision instruments in France in the first half of the 19th century.
Ref: Deborah J. Warner, "Gambey’s American Customers," Rittenhouse 4 (1990): 65–78.
Location
Currently not on view
Object Name
repeating circle
maker
Gambey, Henri Prudence
place made
France: Île-de-France, Paris
Measurements
circle: 9 in; 22.86 cm
telescope: 11 1/2 in; 29.21 cm
ID Number
PH.325685
catalog number
325685
accession number
257193
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History
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