. St. Nicholas [serial]. otherunderwater machin-ery are needed. Thelarge vessels of theNavy are dockedevery six months, andit is also consideredgood business econ-omy to dock fast mer-chant-ships and trans-atlantic liners veryfrequently, as the ma-rine growth may re-tard the speed of aship one half. Dry-docks havebeen built of stone,wood, and is consideredthe best material. The dry-dock looks like a tre-mendous bath-tub, and the bottom has to be verystrong to support the weight of the great end is closed by a sort of barge, or caisson,which, when floated into positi
. St. Nicholas [serial]. otherunderwater machin-ery are needed. Thelarge vessels of theNavy are dockedevery six months, andit is also consideredgood business econ-omy to dock fast mer-chant-ships and trans-atlantic liners veryfrequently, as the ma-rine growth may re-tard the speed of aship one half. Dry-docks havebeen built of stone,wood, and is consideredthe best material. The dry-dock looks like a tre-mendous bath-tub, and the bottom has to be verystrong to support the weight of the great end is closed by a sort of barge, or caisson,which, when floated into position and filled withwater, sinks down into grooves in the sides andbottom of the dry-dock and separates the dockfrom the water outside. Getting a battle-ship or ocean liner into one ofthese dry-docks is a real feat of engineering the water is pumped out of the so lightens it that it rises out of the groovesin the dock and can be floated out of the wayof the incoming ship. Then the tugs tow the ship. A BATTLE-SHIP IN DRY-DOCK.
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Keywords: ., bookauthordodgemar, bookcentury1800, bookdecade1870, bookyear1873
