temptation to smuggling than the tax of one-twentieth upon tin; and smuggling must be much easier in the precious than in the bulky commodity. The tax of the King of Spain accordingly is said to be very ill paid, and that of the Duke of Cornwall very well. Rent, therefore, it is probable, makes a greater part of the price of tin at the most fertile tin mines than it does of silver at the most fertile silver mines in the world. After replacing the stock employed in working those different mines, together with its ordinary profits, the residue which remains to the proprietor is greater, it seems, in the coarse than in the precious metal.

Neither are the profits of the undertakers of silver mines commonly very great in Peru.

The same most respectable and well-informed authors acquaint us,