Boston_Breaker_1904.jpg



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English: The Boston Breaker
Source published in Mining Magazine in the July-December, 1904 issue.
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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.

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Note: This tag should not be used for sound recordings. PD-1923 Public domain in the United States //commons.wikimedia.org/wiki/File:Boston_Breaker_1904.jpg

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