Diffraction Grating
date: label: date made
content: 1877
name: label: maker
content: Rutherfurd, Lewis Morris
notes: label: Description
content: Charles A. Young, professor of astronomy at the College of New Jersey (later Princeton University), acquired this diffraction grating in 1877. The speculum metal plate measures 3 inches square, with the grating measuring 1.75 inch square. It is marked "Dec. 1, 1877" and "14,941 lines" and "8640 per inch" and "Manf. by D. C. Chapman with Mr. Rutherfurd's Engine. No. 175, 2 Ave. N. Y." Daniel C. Chapman was the mechanic who operated the ruling engine designed and built by Lewis M. Rutherfurd.
label: Description
content: Ref: 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
place: label: place made
content: United States: New York
topic: label: Subject
content: Astronomy
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: Princeton University
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.330706
label: accession number
content: 299612
label: catalog number
content: 330706
objectType: label: Object Name
content: diffraction grating
physicalDescription: label: Measurements
content: overall: 73 mm x 73 mm x 7 mm; 2 7/8 in x 2 7/8 in x 9/32 in
label: Measurements
content: overall: 3 3/4 in x 4 11/16 in x 1/2 in; 9.525 cm x 11.90625 cm x 1.27 cm