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File:Improved Steam Valve for pumping engines, 1879.jpg

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Description
English: Improved Steam Valve for pumping engines, 1879
Date
Source Illustration from Patent US 214597 - Improvement in steam-pumps, 1877-79
Author John Tregoning

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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
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Date/TimeThumbnailDimensionsUserComment
current21:50, 24 November 2014Thumbnail for version as of 21:50, 24 November 2014911 × 1,459 (141 KB)MddUser created page with UploadWizard

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