File:Experimental Mine with mule.jpg
Experimental_Mine_with_mule.jpg (348 × 248 pixels, file size: 40 KB, MIME type: image/jpeg)
Captions
This is an image of a place or building that is listed on the National Register of Historic Places in the United States of America. Its reference number is 74001732. |
Object location | 40° 18′ 18.1″ N, 79° 58′ 51.5″ W | View this and other nearby images on: OpenStreetMap | 40.305028; -79.980972 |
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DescriptionExperimental Mine with mule.jpg |
English: A mule at the Experimental Mine, which opened in 1910, Bruceton, Pennsylvania. According to the CDC/NIOSH website: "In 1910, the newly created U.S. Bureau of Mines leased a 38-acre tract of land from the Pittsburgh Coal Co. in Bruceton, about 13 miles south of Pittsburgh. Here, a new mine, known as the Experimental Mine, was opened. One of the early experiments in the Experimental Mine demonstrated that coal dust by itself was capable of propagating an explosion even in the absence of any methane gas. This demonstration was contrary to the old belief widely held at the time that coal dust could not explode without gas. This view had led to the very dangerous and widespread practice of using loose coal dust in mines to pack explosives in boreholes, which had cost many thousands of lives. These early experiments clearly proved that such a practice was too hazardous to continue."[1] |
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Date |
Unknown date Unknown date |
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Source | [2], visible at [3] | ||||
Author | United States Department of the Interior / United States Bureau of Mines; specific persons unknown | ||||
Permission (Reusing this file) |
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Other versions | None |
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 03:39, 1 November 2017 | 348 × 248 (40 KB) | Nyttend (talk | contribs) | Cropping out the car in the Liberty Tunnel | |
03:38, 1 November 2017 | 700 × 248 (71 KB) | Nyttend (talk | contribs) | {{NRHP|74001732}} {{Object location|40|18|18.1|N|79|58|51.5|W}} {{Information |Description={{en|1=A mule at the Experimental Mine, which opened in 1910, [[:en:Bruceton, Pennsylvania|Bruceton, Pennsylvania... |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Width | 3,057 px |
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Height | 2,177 px |
Compression scheme | Uncompressed |
Pixel composition | Black and white (Black is 0) |
Orientation | Normal |
Number of components | 1 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CC 2017 (Windows) |
File change date and time | 09:40, 11 January 2017 |
Exif version | 2.21 |
Color space | Uncalibrated |
Unique ID of original document | uuid:019571B1D781DE118F9ED03570581B6D |
Date metadata was last modified | 04:40, 11 January 2017 |
Date and time of digitizing | 07:53, 5 August 2009 |
IIM version | 2 |