A Complete history of the New York and Brooklyn Bridge : from its conception in 1866 to its completion in 1883 (1883)
Green, S. W. (Samuel W.), Durst, Seymour B., 1913-, former owner. NNC · New York : S.W. Green's Son · leaf 22
ble above THE CAISSON. 19 water. The compressed air is pumped into the interior of thecaisson and drives out the water, forcing it under the iron-shodedges. Engineers and workmen can now go down, trim the earthlevel under the edges, and finally adjust and fix the mass in itsexact place, supporting… … THE CAISSON, STARTED ON ITS JOURNEY DOWN. HOW THE CAISSON SINKS. The laborers with pick, shovel, and barrow feed the dredgeswith the mud and stones they dislodge. When the earth has beensufficiently removed, the workmen drive out alternate blockingsfrom under the partitions on which the mass rests,…
Bridges
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