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Conversions are done for avoirdupois units of mass
that differ from troy and apothecaries considerably in relative factors and absolute weight.
The weight units ton and hundredweight are as used in the United States.
The British, gross or long measures have 112 (v.s. 100) pounds in a hundredweight and 2240 (v.s. 2000) pounds in a ton.
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Written by: Frans B. Simon van Leeuwen.