the cloud, which reflect the sun-beams; so that two people, looking upon a rainbow at the same time, do not see exactly the same rainbow.

CHAP. VII.

Of Springs, Rivers, and the Sea.

PART of the water that falls down from the clouds, runs away upon the surface of the earth into channels, which convey it to the sea; and part of it is imbibed in the spungy shell of the earth, from whence sinking lower by degrees, it falls down into subterranean channels, and so under ground passes into the sea; or else, meeting with beds of rock or clay, it is hindred from sinking lower, and so breaks out in springs, which are most commonly in the sides, or at the bottom of hilly ground.

Springs make little rivulets; those united make brooks; and those coming together make rivers, which empty themselves into the sea.

The sea is a great collection of waters in the deep valleys of the earth. If the earth were all plain, and had not those deep hollows, the earth would be all covered with water; because the water being lighter than the earth, would be above the earth, as the air is above the water.

The most remarkable thing in the sea is that motion of the water called tides. It is a rising and falling of the water of the sea. The cause of this is the attraction of the moon, whereby the part of the water in the great ocean, which is nearest the moon, being most strongly attracted, is raised higher than the rest; and the part opposite to it on the contrary side, being least attracted, is also higher than the rest. And these two opposite rises of the surface of the water in the great ocean, following the motion of the moon from east to west, and striking against the large coasts of the continents that lie in its way; from thence rebounds back again, and so makes floods and ebbs in narrow seas, and rivers

remote from the great ocean. Herein we also see the reason of the times of the tides, and why they so constantly follow the course of the moon.

CHAP. VIII.

Of several Sorts of Earth, Stones, Metals, Minerals, and other Fossils.

THIS 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 liv ing 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 is barren; and such, for the most, are sand, gravel, chalk, and rocks, which produce nothing, where they have no earth mixt 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 sur. face 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 kinds, and sundry bodies that have the texture between earth and stone.

To begin with those fossils which come nearest the earth; under this head we may reckon the several sorts of oker, chalk, that which they call black-lead, and other bodies of this kind, which are harder than earth, but have not the consistency and hardness of perfect stone.

Next to these may be considered stones of all sorts; whereof there is almost an infinite variety. Some of the most remarkable, either for beauty or use, are these : marble of all kinds, porphyry, granate, free-stone, &c. flints, agates, cornelians, pebbles, under which kind come the precious stones, which are but pebbles of an excessive hardness, and when they are cut and polished, they have an extraordinary lustre. The most noted and esteemed are, diamonds, rubies, amethysts, emeralds, topazes, opals.

Besides these, we must not omit those which, though of not so much beauty, yet are of greater use, viz. loadstones, whetstones of all kinds, limestones, callamine, or lapis calaminaris; and abundance of others.

Besides these, there are found in the earth several sorts of salts, as eating or common salt, vitriol, sal gemma, and others.

The minerals, or semi-metals, that are dug out of the bowels of the earth, are antimony, cinnabar, zink, &c. to which may be added brimstone.

But the bodies of most use, that are sought for out of the depths of the earth, are the metals; which are distinguished from other bodies by their weight, fusibility, and malleableness; of which there are these sorts, gold, silver, copper, tin, lead, and, the most valuable of them all, iron; to which one may join that anomalous body quicksilver, or mercury.

He that desires to be more particularly informed concerning the qualities and properties of these subterraneous bodies, may consult natural historians and chymists.

What lies deeper towards the centre of the earth we know not, but a very little beneath the surface of this

globe, and whatever we fetch from under ground, is only what is lodged in the shell of the earth.

All stones, metals, and minerals, are real vegetables; that is, grow organically from proper seeds, as well as plants.

CHAP. IX.

Of Vegetables, or Plants.

NEXT to the earth itself, we may consider those that are maintained on its surface; which, though they are fastened to it, yet are very distinct from it; and those are the whole tribe of vegetables or plants. These may be divided into three sorts, herbs, shrubs, and trees.

Herbs are those plants whose stalks are soft, and have nothing woody in them, as grass, sowthistle, and hemlock. Shrubs and trees have all wood in them; but with this difference, that shrubs grow not to the height of trees, and usually spread into branches near the surface of the earth, whereas trees generally shoot up in one great stem or body, and then, at a good distance from the earth, spread into branches; thus gooseberries, and currants, are shrubs; oaks, and cherries, are trees.

In plants, the most considerable parts are these, the root, the stalk, the leaves, the flower, and the seed. There are very few of them that have not all these parts, though some there are that have no stalk; others that have no leaves; and others that have no flowers. without seed or root I think there are none.

But

In vegetables, there are two things chiefly to be considered, their nourishment and propagation.

Their nourishment is thus: the small and tender fibres of the roots, being spread under ground, imbibe, from the moist earth, juice fit for their nourishment; this is conveyed by the stalk up into the branches, and leaves, through little, and, in some plants, imperceptible tubes, and from thence, by the bark, returns again to the root; so that there is in vegetables, as well as animals, a circulation of the vital liquor. By what

impulse it is moved, is somewhat hard to discover. It seems to be from the difference of day and night, and other changes in the heat of the air; for the heat dilating, and the cold contracting those little tubes, supposing there be valves in them, it is easy to be conceived how the circulation is performed in plants, where it is not required to be so rapid and quick as in animals.

Nature has provided for the propagation of the species of plants several ways. The first and general is by seed. Besides this, some plants are raised from any part of the root set in the ground; others by new roots that are propagated from the old one, as in tulips; others by offsets; and in others, the branches set in the ground will take root and grow; and last of all, grafting and inoculation, in certain sorts, are known ways of propagation. All these ways of increasing plants make one good part of the skill of gardening; and from the books of gardeners may be best learnt.

CHAP. X.

Of Animals.

THERE is another sort of creatures belonging to this our earth, rather as inhabitants than parts of it. They differ in this from plants, that they are not fixed to any one place, but have a freedom of motion up and down, and, besides, have sense to guide them in their motions.

Man and brute, divide all the animals of this our globe.

Brutes may be considered as either aerial, terrestrial, aquatic, or amphibious. I call those aerial, which have wings, wherewith they can support themselves in the air. Terrestrial, are those, whose only place of rest is upon the earth. Aquatic, are those, whose constant abode is upon the water. Those are called amphibious, which live freely in the air upon the earth, and yet are observed to live long upon the water, as if they were natural inhabitants of that element; though it be worth