The negociator's magazine: or, The exchanges anatomiz'd : In two parts. Part I. Shewing the different species and denominations of the moneys, and the meaning of the agio's practised in foreign states, together with the current prices of the exchanges, and the method to calculate them for most places traffick in Europe. Part II. Containing plain instructions concerning bills of exchange, wherein is shewn what method to take in most cases that can happen in the usual transactions and occurrences of trade. The second edition. By Richard Hayes, profess'd accomptant and writing-master.