The negociators's magazine : Or, The most authentick account yet published, of the monies, weights, and measures, of the principal places of trade in the world. Also an account of the European exchanges in general; the customs of merchants relating thereto; and rules and examples to cast them up by; with the nature and use of simple and compound arbitrations; and an history of the English gold and silver coins, for near 500 years past. To which are added, curious calculations of great use in the West-India, Carolina, and New-England trades; and tables shewing the intrinsick value of any foreign gold or silver coin. All of great use of merchants and traders; and entirely necessary to those who would understand merchants accompts. The seventh edition, with many alternations, and great additions. By Richard Hayes, teacher of merchants accompts; late Princes-street near the Bank of England, now of Queen-street near Cheapside.