Coal shall be sold by weight, and, except when sold by cargo, two thousand pounds avoirdupois shall be the standard for the ton. Coke and charcoal in any quantities shall be sold only by weight or measure.
Mass. Gen. Laws ch. 94, § 240
Sale of coal, coke and charcoal by weight
Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.