File:Bronze_Yard_No._11.jpg
From Wikipedia, the free encyclopedia
Bronze_Yard_No._11.jpg (663 × 232 pixels, file size: 25 KB, MIME type: image/jpeg)
This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
DescriptionBronze Yard No. 11.jpg |
English: Bronze Yard No. 11 length standard, the official standard of length for the United states from 1855, when it replaced the Troughton Scale, until 1893, when the US adopted Metric standards. It was an exact copy of the British Imperial Standard Yard, one of a number of Imperial prototype yard length standards constructed by Great Britain in 1855 to replace the British Imperial Troy Yard prototype, which was destroyed in the 1834 Houses of Parliament fire. The bronze bar with square cross section was a "line standard"; when the bar is at 62° F the yard is defined by the distance between two fine lines ruled on gold "plugs" which were set into recesses in the ends of the bar to protect them. Protective caps (shown) fit in the holes. The reason for recessing the defining lines in holes in the bar is to locate them on the bar's "neutral plane", its axis of symmetry, where length error due to sag of the bar under its own weight is minimum. The bar is now in the NIST Museum, Bethesda, Maryland. Alterations to image: Composite of two separate images; a closeup image of the bar end was rotated, cropped, and pasted next to an image of the entire bar. |
Date |
Unknown date Unknown date |
Source |
|
Author | Unknown authorUnknown author |
Permission (Reusing this file) |
Product of U.S. Government employee |
Licensing
Public domainPublic domainfalsefalse |
This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.
English ∙ 日本語 ∙ македонски ∙ Nederlands ∙ +/− |
Items portrayed in this file
depicts
image/jpeg
150dc448c24f47e2dc3fac317fd0befec5f074bb
25,703 byte
232 pixel
663 pixel
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 04:08, 18 January 2013 | 663 × 232 (25 KB) | Chetvorno | User created page with UploadWizard |
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):
Global file usage
The following other wikis use this file:
- Usage on bn.wikipedia.org
- Usage on ca.wikipedia.org
- Usage on it.wikipedia.org
- Usage on ro.wikipedia.org
- Usage on sr.wikipedia.org
Metadata
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
JPEG file comment | File written by Adobe Photoshop? 4.0 |
---|
Retrieved from "https://en.wikipedia.org/wiki/File:Bronze_Yard_No._11.jpg"