Diffraction Grating
date: label: date made
content: 1872
name: label: maker
content: Rutherfurd, Lewis Morris
notes: label: Description
content: 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."
label: Description
content: Ref: Henry Draper, "On Diffraction Spectrum Photography," <i>American Journal of Science</i> 6 (1873): 401-409.
label: Description
content: D. J. Warner, "Lewis M. Rutherfurd: Pioneer Astronomical Photographer and Spectroscopist," <i>Technology and Culture</i> 12 (1971): 190-216.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Science & Mathematics
creditLine: label: Credit Line
content: John William Christopher Draper and James Christopher Draper
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.334274
label: accession number
content: 304826
label: catalog number
content: 334274
objectType: label: Object Name
content: Diffraction Grating
physicalDescription: label: Measurements
content: overall: 2 cm x 48.5 cm x 41 cm; 25/32 in x 19 3/32 in x 16 5/32 in
label: Measurements
content: 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