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File:Peter Cooper Hewitt.jpg

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Original file (2,497 × 3,113 pixels, file size: 1.53 MB, MIME type: image/jpeg)

Summary

Description
English: American electrical engineer Peter Cooper Hewitt (1861-1921), the inventor of the mercury vapor lamp and the mercury vapor rectifier. He is holding one of his mercury vapor rectifier tubes.
Date Between ca. 1900 and 1910
Source
This image is available from the United States Library of Congress's Prints and Photographs division
under the digital ID cph.3c20859.
This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

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Author Bain News Service photograph
Permission
(Reusing this file)		 PD-US "No known restrictions on publication."


Licensing

Public domain
Public domain
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
United States
United States
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

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Peter Cooper Hewitt

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Date/TimeThumbnailDimensionsUserComment
current00:04, 15 September 2011Thumbnail for version as of 00:04, 15 September 20112,497 × 3,113 (1.53 MB)Materialscientisttidied the original from LOC
11:30, 22 January 2009Thumbnail for version as of 11:30, 22 January 2009612 × 780 (245 KB)Mu{{Information |Description={{en|1=American electrical engineer Peter Cooper Hewitt (1861-1921)}} |Source={{LOC-image|id=cph.3c20859}} |Author=Bain News Service photograph |Date=Between ca. 1900 and 1910 |Permission=PD-US "No known restrictions on publicat

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