. The American encyclopædia of commerce, manufactures, commercial law, and finance. d for the building, repairing,or of ships. The ships to be exam-ined or repaired are admitted into it at higli wa-ter; and the water either ebbs out with the reced-ing tide, or is pumped out after the gates are may also be conveniently built in dry />.,and floated out by opening the gates ; though inall dockyards there are places set apart for thispurpose under the name of .<///«. Dry /A are oftwo kinds, — the stalionari/ ilrij D., generally calledynwintj D., and Ihcjloatini/ [). G
. The American encyclopædia of commerce, manufactures, commercial law, and finance. d for the building, repairing,or of ships. The ships to be exam-ined or repaired are admitted into it at higli wa-ter; and the water either ebbs out with the reced-ing tide, or is pumped out after the gates are may also be conveniently built in dry />.,and floated out by opening the gates ; though inall dockyards there are places set apart for thispurpose under the name of .<///«. Dry /A are oftwo kinds, — the stalionari/ ilrij D., generally calledynwintj D., and Ihcjloatini/ [). Gnicini/ D. It refiuircs to be perfectly water-tight,and demands the greatest care in its is sometimes lined all around with wood, butmore generally with masonry, mostly of hewngranite. The expense is very considerable, asthe foundation, by means of piles or otherwise,nmst be well secured, all leakage prcventeil, andthe culvers or drains properly constructed, to letin and carry off the water without its underminingthe quays or piers. A graving D. may be sinyte,. Fig. 13?. —Gr,4viso Dock. or made to contain only one ship; or douhlr, tocontain two ships; but the former is the mostcommon, because more convenient. The entranceis closed by gates, which open sideways, like alock or fall, upon the beil of the entrance, or bycaissons. The vessel is floated into the dock athigh water, the gates closed, the sluices opened,and the water allowed to run out, or is pumped out,leaving the dock perfectly dry; the vessel () being supported on timber struts and shoresresting upon the steps already mentioned as form-ing the sides of the dock. The naval dry I).of the U. States are among the most stupendousmechanical enterprises of the country; they areconstructed at the navy-yards of New York, Charles-town, Norfolk, etc. By far the most extensiveand magnificent of these structures is the granitegraving iJ. at Brooklyn ; 80,000 tons of stonewere used in its construction
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