Foster Surveyor's Vernier Compass

Description
James Foster Jr. (1814-1873) began advertising as a mathematical and philosophical instrument maker in Cincinnati, Ohio, in 1846. He showed his wares at several fairs sponsored by the Ohio Mechanics Institute in the 1850s. This compass belonged to Indiana State University. The rim is graduated every 30 minutes. The vernier on the north arm is moved by rack and pinion, and reads to single minutes. There is a circular level on the south arm. The signature reads "James Foster, Jr. Cincinnati, O."
Location
Currently not on view
Object Name
surveyor's vernier compass
maker
Foster, Jr., James
Measurements
overall length: 15 in; 38.1 cm
needle: 5 1/2 in; 13.97 cm
ID Number
PH*337208
catalog number
337208
accession number
1979.0649
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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