Gambey Vertical Circle

Gambey Vertical Circle

<< >>
Usage conditions apply
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.
Currently not on view
Object Name
vertical circle
date made
Gambey, Henri Prudence
place made
France: Île-de-France, Paris
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
ID Number
accession number
catalog number
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Surveying and Geodesy
Data Source
National Museum of American History
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.


Add a comment about this object