Object Details
- Description
- This is one of several Gambey instruments that the U. S. Coast Survey acquired in the mid-1840s. It is heavy, stable, and precise. The circle itself is silvered, finely graduated (probably to 5 minutes), and read by opposite verniers and magnifiers. The signature reads "Gambey a Paris." The "U S C & G S NO 21" inscription must have been added after 1878, when the Coast Survey became the Coast and Geodetic Survey.
- Location
- Currently not on view
- Data Source
- National Museum of American History
- maker
- Gambey, Henri Prudence
- date made
- 1840s
- Measurements
- telescope aperture: 1 1/4 in; 3.175 cm
- telescope: 12 in; 30.48 cm
- vertical circle: 6 in; 15.24 cm
- overall: 15 1/4 in x 10 15/16 in x 12 1/4 in; 38.735 cm x 27.78125 cm x 31.115 cm
- Object Name
- vertical circle
