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TON. Twenty hundred weight, each hundred weight being one hundred and twelve pounds avoirdupois. See act of congress of Aug. 30, 1842, c. 270, s. 20.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
1978--In what is said to be the first lengthening of a modern cruise ship, Royal Caribbean Cruise Line's Song of Norway is cut in half and an 85-foot midsection is inserted; the vessel's size increases by 4,589 gross register tons, while passenger capacity grows by 316.
At first we had some concerns about booking on such a large ship (142,000 gross register tons).
At 33,930 gross register tons, she carries 1,214 passengers, for a tight passenger space ratio of 28; the average ship today has a space ratio of 40 or better.