Tables of the various weights and measures, and the different coins, both imaginary and real by which all accompts in Asia are kept [electronic resource] : Together with the customs, exchanges, port charges, &c. and correct batty tables, made use of at the different ports in the East-Indies, to which Europeans trade. Also, an account of the names and touches of gold, weights and coins, emperor's and hoppo's duties on the measurage of European ships, with the respective duties on all goods exported and imported at Canton, in China. Likewise, tables for reducing Troy weights into canton weights, and canton weights into troy weights, for the more expeditious paying of silver to the Chinese merchants, calculated from one penny weight to 100,000 ounces, and from one mace to 100,000 tales, &c. &c. compiled with the greatest exactness, and which has been allowed to the the trust tables, and recommended by the American and Portugal merchants, who are continually trading from port to port in the East-Indies. The whole has been found to be very useful to all persons trading to those parts, and hath detected the many frequent frauds and impositions committed by the natives.