Long ton
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
A measure of weight equivalent to 20 hundred-weight of 112 pounds each, or 2,240 pounds, as distingished from the "short" ton of 2,000 pounds.
See Rev. St. U. S. § 2951 (U. S. Co.mp. St. 1907, p. 1941).
But see Jones v. Giles, 10 Exch. 119, as to an English custom of reckoning a ton of iron "long weight" as 2,400 pounds.