File:AmCyc Blasting - Excavation at Blossom Rock showing Charges.jpg

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AmCyc_Blasting_-_Excavation_at_Blossom_Rock_showing_Charges.jpg ‎(697 × 360 pixels, file size: 85 KB, MIME type: image/jpeg)

Description
English: Woodcut/drawing showing the cofferdam and excavations (horizontal section showing the positions of the charges) used for demolishing the top of Blossom Rock in the waters Yerba Buena Island near San Francisco.
Date
Source The American Cyclopædia, v. 2, 1879, p. 702 (Fig. 7).
Author Unknown authorUnknown author
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(Reusing this file)
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_-_Excavation_at_Blossom_Rock_showing_Charges.jpg

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current19:58, 19 March 2014Thumbnail for version as of 19:58, 19 March 2014697 × 360 (85 KB)Library Guy{{Information |Description ={{en|1=Woodcut/drawing showing the cofferdam and excavations (horizontal section showing the positions of the charges) used for demolishing the top of Blossom Rock in the waters Yerba Buena Island near San Francisco.}} |S...

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