block

1

In Belize globe icon., 20th century , a unit of mass used for chicle = 25 pounds avoirdupois, approximately 11.34 kilograms.

United Nations, 1966.

2

John Hatcher.
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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