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Summary

Description
English: A pendant prism from a vault light, showing total internal reflection of light
Date
Source Ian Macky, http://glassian.org/Prism/3Way/14S/page2.html
Author American 3-Way Prism Co's catalog, "3-Way Lighting Systems", ca 1915, page 2

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Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office ) before January 1, 1929.

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Note: This tag should not be used for sound recordings. PD-1923 Public domain in the United States //commons.wikimedia.org/wiki/File:Scatter.gif

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