- 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.
- Currently not on view
- Object Name
- Diffraction Grating
- date made
- Rutherfurd, Lewis Morris
- place made
- United States: New York
- 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
- 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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