- 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.
- Currently not on view
- Object Name
- Diffraction Grating
- date made
- Rutherfurd, Lewis Morris
- place made
- United States: New York
- Physical Description
- glass (overall material)
- 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
- accession number
- catalog number
- Credit Line
- John William Christopher Draper and James Christopher Draper
- Data Source
- National Museum of American History
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