File:Hydraulic Proving Machine c.1857 (9271964242).jpg
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editDescriptionHydraulic Proving Machine c.1857 (9271964242).jpg | The hydraulic proving machine which determine the forces necessary to crush the stone and brick that would support the new dome. Taken in the property yard on the north grounds. See also #5039. Not dated but taken 1857-1860 |
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Unknown date Unknown date |
Source | Hydraulic Proving Machine c.1857 |
Author | USCapitol |
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editPublic domainPublic domainfalsefalse |
This image is a work of an employee of the Architect of the Capitol, taken or made as part of that person's official duties. As a work of the U.S. federal government, all images created or made by the Architect of the Capitol are in the public domain in the United States. |
This image was originally posted to Flickr by USCapitol at https://flickr.com/photos/65191584@N07/9271964242. It was reviewed on 30 July 2015 by FlickreviewR and was confirmed to be licensed under the terms of the United States Government Work. |
30 July 2015
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current | 21:56, 30 July 2015 | 2,500 × 1,831 (1.98 MB) | Tm (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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