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File:AmCyc Blasting - Mode of Forming Steps (“Stoping”; Front View).jpg

AmCyc_Blasting_-_Mode_of_Forming_Steps_(“Stoping”;_Front_View).jpg ‎(398 × 234 pixels, file size: 36 KB, MIME type: image/jpeg)

Description
English: Woodcut/drawing illustrating a method a forming steps in rock blasting called stoping (front view)
Date
Source The American Cyclopædia, v. 2, 1879, p. 700 (Fig. 3;right).
Author Unknown authorUnknown author
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Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:AmCyc_Blasting_-_Mode_of_Forming_Steps_(%E2%80%9CStoping%E2%80%9D;_Front_View).jpg

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current18:25, 19 March 2014Thumbnail for version as of 18:25, 19 March 2014398 × 234 (36 KB)Library Guy{{Information |Description ={{en|1=Woodcut/drawing illustrating a method a forming steps in rock blasting called stoping (front view)}} |Source =''The American Cyclopædia, v. 2, 1879, p. 700 (Fig. 3;right). |Author =unknown artist |...

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