Surveyor's Transit


The "B. Pike & Son. New York. Warranted" inscription identifies the shop in which this instrument was sold, but not necessarily where it was made, or by whom. This inscription was used between 1831 and 1841, when Benjamin Pike worked with his son Benjamin Jr., and again between 1843 and 1850, when Benjamin Pike worked with his son Daniel. While the word "Warranted" represents the Pikes' guarantee of quality. In design and production, this instrument is less successful than those made by men who specialized in instruments of this sort.

As in William J. Young's original surveyor's transit, the horizontal circle here is inside the compass face. The circle, however, is graduated every 30 minutes of arc, and read by vernier to single seconds. The vertical circle is graduated every 1 degree, and read by vernier to 4 minutes.

Maker: B. Pike & Son

Location: Currently not on view

Place Made: United States: New York

See more items in: Medicine and Science: Physical Sciences, Surveying and Geodesy, Measuring & Mapping


Exhibition Location:

Data Source: National Museum of American History

Id Number: 1980.0254.01Accession Number: 1980.0254Catalog Number: 1980.0254.01

Object Name: transit

Measurements: overall: 9 in; 22.86 cmbase plate: 8 1/2 in; 21.59 cmvertical circle: 5 in; 12.7 cmneedle: 6 in; 15.24 cmtelescope: 9 1/4 in; 23.495 cmlevel vial above the telescope: 4 1/4 in; 10.795 cmoverall: 11 in x 8 1/4 in x 9 7/8 in; 27.94 cm x 20.955 cm x 25.0825 cm


Record Id: nmah_745974

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