Rutherfurd Diffraction Grating

Description
Lewis M. Rutherfurd (1816-1892) was an independent astronomer in New York City who began making diffraction gratings around 1871 and distributing them freely to astronomers and physicists in the United States and abroad. By 1875 he was producing gratings with 17,280 lines per inch. This example is a steel plate measuring 1.75 inches square overall, with the ruled area occupying the central 1 inch square. The plate is marked "Dec. 22, 1877" and a card in the box is marked "17,280 No. 1".
Ref. D. J. Warner, "Lewis M. Rutherfurd: Pioneer Astronomical Photographer and Spectroscopist," Technology and Culture 12 (1971): 190-216.
Location
Currently not on view
date made
1877
maker
Rutherfurd, Lewis Morris
place made
United States: New York
Measurements
overall: 7.4 cm x 6.1 cm x 2 cm; 2 29/32 in x 2 13/32 in x 25/32 in
overall; in case: 3/4 in x 3 in x 2 7/16 in; 1.905 cm x 7.62 cm x 6.19125 cm
ID Number
PH*314901
accession number
212171
catalog number
314901
Credit Line
Mrs. Russell Munroe
See more items in
Medicine and Science: Physical Sciences
Science & Mathematics
Data Source
National Museum of American History, Kenneth E. Behring Center

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