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 1⅜ inches square and is marked "Nov. 19, 1872, 6480 per inch 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
Physical Description
glass (overall material)
Measurements
overall: 2 mm x 37.5 mm x 36 mm; 3/32 in x 1 15/32 in x 1 13/32 in
overall; museum storage case: 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.334273
accession number
304826
catalog number
334273
Credit Line
John William Christopher Draper and James Christopher Draper
subject
Astronomy
See more items in
Medicine and Science: Physical Sciences
Science & Mathematics
Data Source
National Museum of American History
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