Gravity Pendulum

This is probably one of the invariable Kater-type pendulums that Charles Sanders Peirce used in 1873 and 1874 when, working under the auspices of the U.S. Coast and Geodetic Survey, he measured the force of gravity in the Hoosac Tunnel near North Adams, at Northampton, and at Cambridge, Massachusetts. The Survey transferred it to the Smithsonian in 1959.
Currently not on view
Object Name
gravity pendulum
overall: conical pole: 40 in x 3 in; 101.6 cm x 7.62 cm
overall: hook pole: 23 in x 2 in x 1 in; 58.42 cm x 5.08 cm x 2.54 cm
ID Number
accession number
catalog number
Measuring & Mapping
U.S. Coast & Geodetic Survey
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History, Kenneth E. Behring Center

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