Rutherfurd Diffraction Grating

Description
Charles A. Young, professor of astronomy at the College of New Jersey (later Princeton University), acquired this diffraction grating in 1877. The speculum metal plate measures 3 inches square, with the grating measuring 1.75 inch square. It is marked "Dec. 1, 1877" and "14,941 lines" and "8640 per inch" and "Manf. by D. C. Chapman with Mr. Rutherfurd's Engine. No. 175, 2 Ave. N. Y." Daniel C. Chapman was the mechanic who operated the ruling engine designed and built by Lewis M. Rutherfurd.
Ref: D. J. Warner, "Lewis M. Rutherfurd: Pioneer Astronomical Photographer and Spectroscopist," Technology and Culture 12 (1971): 190-216.
Location
Currently not on view
Object Name
diffraction grating
Rutherfurd diffraction grating
date made
1877
maker
Rutherfurd, Lewis Morris
Measurements
overall: 73 mm x 73 mm x 7 mm; 2 7/8 in x 2 7/8 in x 9/32 in
place made
United States: New York
ID Number
PH*330706
accession number
299612
catalog number
330706
subject
Astronomy
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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