- The inscriptions on this graphometer read "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), who was in business in New York during the period 1843–1864, 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
- place made
- United States: New York, New York City
- overall: 12 in; 30.48 cm
- needle: 3 1/2 in; 8.89 cm
- overall; pike: 1 in x 7 3/8 in x 2 1/4 in; 2.54 cm x 18.7325 cm x 5.715 cm
- overall; graphometer: 4 7/16 in x 11 15/16 in x 6 in; 11.27125 cm x 30.32125 cm x 15.24 cm
- ID Number
- catalog number
- accession number
- Data Source
- National Museum of American History
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