CHAIN

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CHAIN, in surveying, is a measure consisting of a certain number of links of iron wire, serving to take the dimensions of fields, &c. Chain. In nautical language, chains are strong links or plates of iron, the lower ends of which are bolted through a ship's side to the timbers. They are on the outside, and are used to contain the blocks called deadeyes, by which., the shrouds of the masts are extended.^Tojo chains are those which preserve the lower yards from falling, when, in time of battle, the ropes are rendered incapable of service.