California Institute of Technology > Image Archive > Grating, concave

Image / Grating, concave

Have a question about this item?

Item Information. View source record on contributor's website.

Title
Grating, concave
Date Created and/or Issued
1901
Contributing Institution
California Institute of Technology
Collection
Image Archive
Rights Information
Materials from the Caltech Archives are made available online for research purposes. Permission for reproduction, distribution, public display, performance, or publication must be obtained in writing from the Head of Archives. The Caltech Archives makes no representation that it is the copyright owner in all of its holdings. It is the responsibility of the user to obtain all necessary rights and clearances for use of materials. For questions, contact Head of Archives.
Description
This grating was ruled on speculum; a light aluminum coat has since been applied. The plate was prepared by the John A. Brashear Co., Allegheny, PA. It was ruled on Prof. Henry Rowland's engine at Johns Hopkins Univ., Baltimore, MD. Used by Bowen and Millikan from 1919 on.
1901
Type
Image
Format
Photographs
Negatives
Identifier
ct1:115
http://archives-dc.library.caltech.edu/islandora/object/ct1%3A115

Explore related content on Calisphere: