In Belize , 20th century , a unit of mass used for chicle = 25 pounds avoirdupois, approximately 11.34 kilograms.
United Nations, 1966.
English Tin Production and Trade before 1550.
Oxford: Clarendon Press, 1973.
Page 4: “Blocks of Cornish tin usually weighed between 200 and 300 pounds, and blocks of Devon tin, termed 'slabs', half as much.”
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