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23.1 x 32.5 cm ⏐ 9.1 x 12.8 in (300dpi)
OXFORD SCIENCE ARCHIVE / HERITAGE IMAGES / SCIENCE PHOTO LIBRARY OXFORD SCIENCE ARCHIVE / HERITAGE IMAGES / SCIENCE PHOTO LIBRARY
Blowing up Flood Rock, 1885, (1886). Top: Sectional view of workings under East River, New York, during preparations to destroy Flood Rock, part of the Hell Gate Rocks complex which prevented large vessels reaching New York Harbour, and presented a hazard to smaller ones. Bottom: Placing dynamite cartridges in drill holes in the roof of the excavations. From Le Journal de la Jeunesse.
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