Image / Ruling engine 'A' at the Mount Wilson Observatory optical laboratory, Pasadena

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Title: Ruling engine 'A' at the Mount Wilson Observatory optical laboratory, Pasadena
Date Created and/or Issued: 1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
Contributing Institution: Huntington Library
Collection: Photographs
Rights Information: For information on using Huntington Library materials, please see Reproductions of Huntington Library Holdings: https://www.huntington.org/library-rights-permissions
Description: Ruling engine ('A' machine) in main shop of observatory -- interference test for concentricism between screw & pivots (bearings). Photo taken at Mount Wilson Observatory's Pasadena optical laboratory.
Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Type: image
Format: image/tiff
Identifier: COPC 1684
29681
http://hdl.huntington.org/cdm/ref/collection/p15150coll2/id/514
Subject: Diffraction gratings
Spectrum analysis--Instruments
Optical instruments
Astronomical instruments
Machinery
Photographic prints. (gmgpc)
Place: Pasadena (Calif.)
Source: Photographs, Huntington Digital Library

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