Diffraction Grating

Diffraction Grating

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Description
This is one of the earliest gratings made by Lewis M. Rutherfurd, and one of three that the pioneer astrophysicist, Henry Draper, acquired in the fall of 1872. The glass plate measures 1.5 inches square overall, with the grating measuring 1⅛ inches square, and is marked "12960 to the inch Oct. 16, 1872 L. 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
date made
1872
maker
Rutherfurd, Lewis Morris
place made
United States: New York
Measurements
overall: 2 mm x 38 mm x 35 mm; 3/32 in x 1 1/2 in x 1 3/8 in
overall; in museum storage: 2 1/4 in x 1 7/8 in x 2 1/4 in; 5.715 cm x 4.7625 cm x 5.715 cm
ID Number
PH.334272
accession number
304826
catalog number
334272
Credit Line
John William Christopher Draper and James Christopher Draper
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Medicine and Science: Physical Sciences
Science & Mathematics
Data Source
National Museum of American History
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