Peter Hewitt, Us Electrical Engineer is a photograph by Miriam And Ira D. Wallach Division Of Art, Prints And Photographs which was uploaded on December 18th, 2014.
Peter Hewitt, Us Electrical Engineer
Peter Cooper Hewitt (1861-1921), US electrical engineer. Hewitt invented a mercury-vapour lamp (patented 1901) and built the first mercury arc... more
Title
Peter Hewitt, Us Electrical Engineer
Artist
Miriam And Ira D. Wallach Division Of Art, Prints And Photographs
Medium
Photograph
Description
Peter Cooper Hewitt (1861-1921), US electrical engineer. Hewitt invented a mercury-vapour lamp (patented 1901) and built the first mercury arc rectifier (1902). Early models of the lamp were a thin tube with a pool of mercury filling the lamp with mercury vapour. Current flowing between electrodes and through the mercury vapour discharged a bluish-green light. The mercury arc rectifier, used to convert alternating current to direct current, was used in industry and on the railways. This signed 1918 photograph is from a collection of unpublished images obtained for 'The Pageant of America A Pictorial History of the United States' (1925-1929).
Uploaded
December 18th, 2014
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