The negociator's magazine [electronic resource] : or the most authentic account yet published, of the monies, weights, and measures, of the principal places of trade in the known world. Also an account of the European exchanges in general; the Laws and Customs of Bills of Exchange, Promissory Notes, &c. with the Method of computing Exchanges; also the Nature and Use of Simple and Compound Arbitrations. To which are added, curious calculations of great use in the West-Indian and American trades, and Tables shewing the intrinsick Value of any foreign Gold or Silver Coin. All of great Use to Merchants and Traders; and entirely necessary to those, who would understand Merchants Accounts. By Richard Hayes. The tenth edition, revised, methodized, and improved with the addition of several new and useful tables, by Benjamin Webb, Writing Master and Accountant, and Master of the Grammar School belonging to the Worshipful Company of Haberdashers in Bunhill-Row; Author of the Tables for buying and selling Stocks, and of the Complete Annuitant.