Pike Graphometer

This graphometer is marked "B. Pike Jr New York" and "Benjn Pike Jr 294. Broadway N.Y." The semicircle is graduated to 30 minutes, and read by silvered verniers at either end of the alidade to single minutes. Benjamin Pike Jr. (1809–1864) was in business in New York during the period 1843–1864. He probably imported this instrument from France. New, it cost $30. The vertical sights were reconstructed at the Museum.
Ref: Benjamin Pike, Jr., Illustrated Descriptive Catalogue of Optical, Mathematical, and Philosophical Instruments (New York, 1856), pp. 64–65.
Currently not on view
Object Name
Pike, Jr., Benjamin
overall: 12 in; 30.48 cm
needle: 3 1/2 in; 8.89 cm
place made
United States: New York, New York
ID Number
catalog number
accession number
Measuring & Mapping
Surveying and Geodesy
See more items in
Medicine and Science: Physical Sciences
Surveying and Geodesy
Data Source
National Museum of American History, Kenneth E. Behring Center
Pike, Jr., Benjamin. Illustrated Descriptive Catalogue of Optical, Mathematical, and Philosophical Instruments
Additional Media

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