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pneumatic caisson


  • WordNet 3.6
    • n pneumatic caisson large watertight chamber used for construction under water
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Webster's Revised Unabridged Dictionary
    • Pneumatic caisson (Engin) a caisson, closed at the top but open at the bottom, and resting upon the ground under water. The pressure of air forced into the caisson keeps the water out. Men and materials are admitted to the interior through an air lock. See Lock.
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In literature:

The shafts were sunk as pneumatic caissons to a depth of 78 ft. below mean high water.
"Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910" by James H. Brace, Francis Mason and S. H. Woodard
Work was begun in May 1881, when attempts were made to sink an iron caisson under pneumatic pressure.
"Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 6" by Various
Great Bridges, Pneumatic Caissons, Tunnels.
"The Progress of Invention in the Nineteenth Century." by Edward W. Byrn