The merchants map of commerce wherein the universal manner and matter relating to trade and merchandize are fully treated of, the standard and current coins of most princes and republicks observ'd, the real and imaginary coins of accounts and exchanges express'd, the natural products and artificial commodities and manufactures for transportation declar'd, the weights and measures of all eminent cities and towns of traffick in the universe, collected one into another, and all reduc'd to the meridian of commerce practis'd in the famous city of London / by Lewis Roberts, merchant.

Pair between Antwerp and Paris, or any part of France.

THE French Crown of 60 Soulz, or 3 Li∣vres Tournois, wherein Exchanges are usually made for France, is worth 89 31/67 gross of Antwerp, which is indeed the true Value of the Crown. If then the Bill of Exchange be made for less than 89 37/67 gross per Crown of 3 l. Tournois, there is a Loss thereby, and if for more there is a Gain. So that 89 37/67 gross being the Pair in Exchanges between these two Countries, in the Crown of France, and the Gross of Antwerp, you may presently see whether there be Loss or Gain by any Parcel done by Exchange. And the like may be done between any other two Places, having first found out the Pair or equalizing the Mo∣ny of one Country with that of the other Country where the Exchange is to be made, and knowing at what Price the Exchange then goes, the Loss or Gain will soon ap∣pear. But this Pair being grounded princi∣pally upon the currant. Value of Coins, the Plenty and Scarcity thereof, the rising and falling, Inhancement and Debasement of the same, it must necessarily follow that the same is subject to change, as Experience doth shew.