The British negociator [electronic resource] : or, foreign exchanges made perfectly easy. Containing tables for all the various courses of exchange from, and the several coins equated of, Holland, Hamburgh, Germany, France, Spain, Portugal, Venice, Leghorn, Genoa, Denmark, Poland, Sweden, Russia, Ireland. Together With Tables and Rules for Exchanges, from Asia, Africa, and America, or the West-Indies: And the Exchanges of the Principal Foreign Nations with one another. Also, Arbitrations of Exchanges, in a new and concise Method applicable to Business. Likewise, the weights and measures of foreign nations. To which are annexed, Several Mercantile Tables, equally useful to Foreign Traders and Factors, and to Inland Merchants and Dealers. And An Essay on the Nature and Business of Exchanging in general is prefixed, by Way of Introduction. By S. Thomas, merchant.