AmCyc Blasting - Excavation at Blossom Rock showing Charges, 1879

AmCyc Blasting - Excavation at Blossom Rock showing Charges, 1879

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: 1879.
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Author: Unknown authorSource: https://commons.wikimedia.org/

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illustrations for “blasting” in the american cyclopædiamining diagramsyerba buena islandblossom rock (san francisco bay)

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