Surveyor's Compass

Surveyor's Compass

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The “C.G. King Boston” inscription on this compass is that of Charles Gedney King (1808-1858), a mathematical instrument maker who apprenticed with his father, Gedney King, and traded under his own name after his father’s death in 1839. C. G. King showed his instruments at fairs sponsored by the Massachusetts Charitable Mechanics Association in the 1840s and 1850s, and took home several silver medals.
King also announced he "Is now manufacturing and has for sale the largest assortment of Mathematical, Nautical, Engineers, Surveyors and Drafting Instruments to be found in the city." Moreover, the engineers’ and surveyors’ instruments manufactured in the King establishment, "are divided upon a new Engine, made expressly for the purpose, the performance of which, for the accuracy of its division, cannot be surpassed, if equalled, by any Engine in the Country."
The rim of this example is graduated to 30 minutes. There are two level vials on the south arm.
Ref: "Evidence of the Enterprise," Rittenhouse 1 (1987): 90.
Currently not on view
Object Name
Surveyor's Compass
date made
King, Charles Gedney
place made
United States: Massachusetts, Boston
overall length: 15 5/8 in; 39.6875 cm
needle: 5 in; 12.7 cm
overall case: 4 5/16 in x 15 1/2 in x 7 1/2 in; 10.95375 cm x 39.37 cm x 19.05 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
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