<< >>
Usage conditions apply
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.
Currently not on view
Object Name
date made
ca 1910
W. & L. E. Gurley
place made
United States: New York, Troy
Physical Description
metal (overall material)
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
catalog number
accession number
Credit Line
Department of Physics, Columbia University
See more items in
Medicine and Science: Physical Sciences
Science & Mathematics
Data Source
National Museum of American History
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.


Add a comment about this object