Rutherfurd Diffraction Grating

Description:

Lewis M. Rutherfurd (1816-1892) was an astronomer in New York City who began making diffraction gratings around 1871 and distributing them freely to astronomers and physicists in the United States and abroad. By 1875 he was producing gratings with 17,280 lines per inch. This example is a steel plate measuring 1.75 inches square overall, with the ruled area occupying the central 1 inch square. The plate is marked "Dec. 22, 1877" and a card in the box is marked "17,280 No. 1".

This diffraction grating may once have belonged to George Frederick Barker (1835-1910), a physical scientist who taught at University of Pennsylvania, and who was an active member of the National Academy of Sciences, the American Philosophical Society, and other scientific organizations. Barker may have inherited it from John Christopher Draper (1835-1885), a New York scientist who used a grating of this description to observe, or so he thought, the dark lines of oxygen in the solar spectrum.

Ref. D. J. Warner, "Lewis M. Rutherfurd: Pioneer Astronomical Photographer and Spectroscopist," Technology and Culture 12 (1971): 190-216.

Elihu Thomson, “George Frederick Barker, M.D., Sc.D., LL.D.,” Proceedings of the American Philosophical Society 50 (1911): xiii-xxix.

John Christopher Draper, “On the Presence of Dark Lines in the Solar Spectrum, which correspond closely to the lines of the Spectrum of Oxygen,” American Journal of Science 16 (1878): 256-265.

Date Made: 1877

Maker: Rutherfurd, Lewis Morris

Location: Currently not on view

Place Made: United States: New York

See more items in: Medicine and Science: Physical Sciences, Science & Mathematics

Exhibition:

Exhibition Location:

Credit Line: Mrs. Russell Munroe

Data Source: National Museum of American History

Id Number: PH.314901Accession Number: 212171Catalog Number: 314901

Object Name: diffraction grating

Measurements: overall: 7.4 cm x 6.1 cm x 2 cm; 2 29/32 in x 2 13/32 in x 25/32 inoverall; in case: 3/4 in x 3 in x 2 7/16 in; 1.905 cm x 7.62 cm x 6.19125 cm

Guid: http://n2t.net/ark:/65665/ng49ca746aa-3aa8-704b-e053-15f76fa0b4fa

Record Id: nmah_1183797

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