Peirce Gravity Pendulum No. 4

This is the fourth and final Peirce pendulum that the U.S. Coast and Geodetic Survey produced in the early 1880s. It is marked: "Peirce No. 4 USC&G Survey." It may have been used at the base station located at the Smithsonian Institution in Washington, D.C.
Ref: Victor Lenzen and Robert Multhauf, "Development of Gravity Pendulums in the 19th Century," United States National Museum Bulletin 240 (1965): 301-348.
C. H. Swick, Modern Methods of Measuring the Intensity of Gravity (Washington, D.C.: United States Coast & Geodetic Survey, 1921).
Currently not on view
Object Name
gravity pendulum
overall: 62 in x 2 3/4 in; 157.48 cm x 6.985 cm
place made
United States: District of Columbia, Washington
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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