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Usage conditions apply
Octant with an ebony frame and reinforced brass index arm. The brass scale is graduated every 20 minutes from -2° to +100° and read by vernier and tangent screw to single minutes of arc. The "Richard Patten New York" inscription refers to Richard Patten (1792-1865), an instrument maker who began in business in New York City in 1813 and was soon the proprietor of a Navigation Warehouse. By 1820 he was advertising that he was a "manufacturer of mathematical instruments... equal to any in the City of London." Elsewhere he claimed to be the "only manufacturer of Sextans [sic] and Quadrants in New York," and that "All instruments in the above line [are] made to order & warranted, being divided on an engine after the Plan of Ramsden’s."
Ref: Deborah J. Warner, "Richard Patten (1792-1865)," Rittenhouse 6 (1989): 57-63.
Currently not on view
Object Name
Patten, Richard
place made
United States: New York
Physical Description
ebony (overall material)
brass (overall material)
average spatial: 8.2 cm x 25.4 cm x 30.5 cm; 3 1/4 in x 10 in x 12 in
overall in case: 4 in x 10 1/8 in x 12 5/8 in; 10.16 cm x 25.7175 cm x 32.0675 cm
ID Number
catalog number
accession number
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Medicine and Science: Physical Sciences
Measuring & Mapping
Data Source
National Museum of American History
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