*chaldron*

n. [ OF. chaldron, F. chaudron kettle. The same word as caldron. ] An English dry measure, being, at London, 36 bushels heaped up, or its equivalent weight, and more than twice as much at Newcastle. Now used exclusively for coal and coke. [ 1913 Webster ]

☞ In the United States the chaldron is ordinarily 2, 940 lbs, but at New York it is 2, 500 lbs. De Colange. [ 1913 Webster ]