Page:The Works of John Locke - 1823 - vol 03.djvu/335



solid globe we live upon is called the earth, though it contains in it a great variety of bodies, several whereof are not properly earth; which word, taken in a more limited sense, signifies such parts of this globe as are capable, being exposed to the air, to give rooting and nourishment to plants, so that they may stand and grow in it. With such earth as this the greatest part of the surface of this globe is covered; and it is as it were the store-house, from whence all the living creatures of our world have originally their provisions; for from thence all the plants have their sustenance, and some few animals, and from these all the other animals.

Of earth, taken in this sense, there are several sorts, v. g. common mould, or garden earth, clay of several kinds, sandy soils.

Besides these, there is medicinal earth; as that which is called terra lemnia, bolus armena, and divers others.

After the several earths, we may consider the parts of the surface of this globe which are barren; and such, for the most, are sand, gravel, chalk, and rocks, which produce nothing, where they have no earth mixed amongst them. Barren sands are of divers kinds, and consist of several little irregular stones without any earth; and of such there are great deserts to be seen in several parts of the world.

Besides these, which are most remarkable on the surface of the earth, there are found deeper, in this globe, many other bodies, which, because we discover by digging into the bowels of the earth, are called by one common name, fossils; under which are comprehended metals, minerals, or half metals, stones of divers