Archivo: Peter Cooper Hewitt
Description: 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.
Title: Peter Cooper Hewitt
Credit: 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 for more information. العربية | čeština | Deutsch | English | español | فارسی | suomi | français | magyar | italiano | македонски | മലയാളം | Nederlands | polski | português | русский | slovenčina | slovenščina | Türkçe | українська | 中文 | 中文（简体） | 中文（繁體） | +/−
Author: Bain News Service photograph
Permission: PD-US "No known restrictions on publication."
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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