Rutherfurd Diffraction Grating

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 2 inches square; the grating surface is 31/32 inches wide; the grooves are 13/16 inches long. The plate is marked "6480 per inch 90 L. M. Rutherfurd."
Ref: Henry Draper, "On Diffraction Spectrum Photography," American Journal of Science 6 (1873): 401-409.
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
Measurements
overall: 2 cm x 48.5 cm x 41 cm; 25/32 in x 19 3/32 in x 16 5/32 in
ID Number
PH*334274
accession number
304826
catalog number
334274
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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