An authentick account of the weights , measures, exchanges, customs, duties, port-charges, [electronic resource] : &c. &c. and correct Batty tables, made use of, and paid at the several ports of the East-Indies, traded unto by Europeans: together with an account of all the different coins (both real and imaginary) by which all accompts in Asia are kept: Also The Coins, Weights, Names and Touches of Gold, Emperor's and Hoppo's Duties on the Measurage of European Ships; with the Duties on all Goods Imported and Exported at Canton in China. To which are Added, Tables, reducing Troy Weights into Canton Weights, and Canton Weights into Troy Weights, for the readier Payment of Silver to the Chinese Merchants, calculated with the greatest Exactness from One Penny-Weight to 100,000 Ounces, and from One Mace to 100,000 Tales, &c. &c. Great Part whereof is from the Author's own Experience, and the Remainder compiled from the most authentick Accounts, taken by the Armenian and Portuguese Merchants, who are continually trading from Port to Port in the East-Indies. The whole being of great Use to all Gentlemen trading to those Parts, by preventing the many and too frequent Impositions and Frauds committed by the Natives. By Samuel Jackson.