Gurley Spherometer

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Description
A spherometer is a device used primarily for measuring the curvature of objects such as lenses and curved mirrors. For further information about spherometers, see object MA*315739.
In 1845 William Gurley (1821-1887) became a partner to J.H. Phelps in his instrument shop. In 1851 William's brother Lewis joined the firm, and in 1852 they bought out Phelps and founded Gurley Precision Instruments using the mark “W. & L.E. Gurley in Troy N.Y.” This Gurley device was originally owned by the Department of Physics, Columbia University, and was donated to the Smithsonian in 1975.
Sources: http://www.gurley.com/
W. & L.E. Gurley, Catalog (1910): 94-96.
Location
Currently not on view
date made
ca 1910
maker
W. & L. E. Gurley
place made
United States: New York, Troy
Physical Description
metal (overall material)
Measurements
overall: 5 5/8 in x 4 1/8 in x 4 1/4 in; 14.2875 cm x 10.4775 cm x 10.795 cm
overall: 4 1/2 in x 4 3/8 in x 4 1/4 in; 11.43 cm x 11.1125 cm x 10.795 cm
ID Number
PH.335217
catalog number
335217
accession number
315390
Credit Line
Department of Physics, Columbia University
subject
Mathematics
See more items in
Medicine and Science: Physical Sciences
Science & Mathematics
Spherometers
Data Source
National Museum of American History, Kenneth E. Behring Center

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