Spectroscope

Description
This is a direct vision spectroscope inscribed “WALLACE / SPECTROSCOPE / CENTRAL SCIENTIFIC CO. / CHICAGO.” Instead of a prism assembly, this instrument has a replica diffraction grating of the sort developed by Robert James Wallace (1868-1945), a photographer at the Yerkes Observatory in Williams Bay, Wisconsin.
Ref: Robert J. Wallace, “Diffraction Grating Replicas,” Astrophysical Journal 22 (1905): 123-130, and 23 (1906): 96-99.
Central Scientific Company, Physical and Chemical Apparatus (Chicago, 1909), p. 234.
Location
Currently not on view
Object Name
spectroscope
date made
early 20th century
maker
Central Scientific Company
Measurements
overall: 4 in; 10.16 cm
place made
United States: Illinois, Chicago
ID Number
PH*337125
catalog number
337125
1979.0026.13
accession number
1979.0026
subject
Science & Scientific Instruments
Optics
Science & Mathematics
See more items in
Medicine and Science: Physical Sciences
Optics
Data Source
National Museum of American History, Kenneth E. Behring Center

Visitor Comments

Add a comment about this object

**Please read before submitting the form**

Have a comment or question about this object to share with the community? Please use the form below. Selected comments will appear on this page and may receive a museum response (but we can't promise). Please note that we generally cannot answer questions about the history, rarity, or value of your personal artifacts.

Have a question about anything else, or would you prefer a personal response? Please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Image CAPTCHA
Enter the characters shown in the image.