Inserting blasting caps into dynamite cartridges to blow up Flood Rock, East River, part of the Hell Gate Rocks complex, which was partially removed in 1876 and 1885. These rocks prevented large ships from reaching New York Harbour and posed a danger to smaller vessels. From Scientific American, New York, 1885, Historical, digitally restored reproduction from a 19th century original, Record date not stated

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TPG34814096

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達志影像

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