fertility. That of a metallic mine depends more upon its fertility, and less upon its situation. The coarse, and still more the precious metals, when separated from the ore, are so valuable that they can generally bear the expense of a very long land, and of the most distant sea carriage.

Their market is not confined to the countries in the neighbourhood of the mine, but extends to the whole world. The copper of Japan makes an article of commerce in Europe; the iron of Spain in that of Chili and Peru. The silver of Peru finds its way, not only to Europe, but from Europe to China.

The price of coals in Westmoreland or Shropshire can have little effect on their price at Newcastle; and their price in the Lionnois can have none at all. The productions of such distant coal-mines can never be