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Animal Generation (Places The crocodile)

places. The crocodile and sea-tortoise go ashore to lay their eggs in the sand; in these cases, Nature, as a provident nurse, takes care of all.

The multiplication of animals is not restrained to the same rule in all; for some have a remarkable power of increase, while others are, in this respect, confined within very narrow limits. Yet, in general, we find, that nature observes this order, that the least animals, and those which are most useful for food to others, usually increase with the greatest rapidity. The mite, and many other insects, will multiply to a thousand within the compass of a few days; while the elephant hardly produces a young one in two years. The Birds of the hawk-kind seldom lay more than two eggs; while poultry will produce from fifteen to thirty. The diver, or loon, which is eaten by few animals, lays also only two eggs; but the duck-kind, moor game, partridges, &c. and small birds in general, lay a great many. Most of the insect tribes neither bear young nor hatch eggs; yet they are the most numerous of all living creatures; and were their bulk proportionable to their numbers, there would not be room on the earth for any other animals. The Creator has wisely ordained the preservation of these minute creatures. females lay not their eggs indiscriminately, but are endued with instinct to choose such places as may supply their infant offspring with proper nourishment: in their case, this is absolutely necessary, for the mother dies as soon as she has deposited her eggs, the male parent having died before this event takes place; so that no parental care ever falls to the lot of this orphan race. And indeed, were the parents to live, it does not appear that they would possess any power to assist their young. Butterflies, weevils, tree-bugs, gall-insects, and many others, lay their eggs on the leaves of plants; and every different tribe chooses its own species of plants. Nay, there is scarce any plant which does not afford nourishment to some insect; and still more, there is hardly any part of a plant which is not preferred by some of them. Thus one feeds upon the flower; another upon the leaves; another upon the trunk; and still another upon the root. But it is particularly curious to observe how the leaves of some trees of plants are formed into dwellings for the convenience of these creatures. Thus the gall-insect fixes her eggs in the leaves of an oak; the wounded leaf swells, and a knob arises like an apple, which includes, protects, and nourishes the embryo. In the same manner are the galls produced, which are brought from Asiatic Turkey, and which are used both as a medicine, and as a dye in several of our manufactories.

When the tree-bug has deposited its eggs in the boughs of the fir-tree, excrescences arise, shaped like pearls. When 4 another insect of the same species has deposited its eggs in the mouse-ear, chick-weed, or speedwell plants, the leaves contract in a wonderful manner into the shape of a head. The water spider excludes eggs either on the extremities of juniper, which from thence forms a lodging that resembles the arrow-headed grass; or on the leaves of the poplar, from whence a red globe is produced. The tree-louse lays its eggs on the leaves of the black poplar, which turn into a kind of inflated bag; and so in many other instances.

Nor is it only upon plants that insects live and lay their eggs. The gnat commits her's to stagnant waters; the flesh-fly, in putrified flesh; another kind of insect deposits her's in the cracks of cheese.

Some insects exclude their eggs on certain animals; the mill-beetle, between the scales of fishes; a species of the gadfly, on the back of bullocks; another of the same species, on the back of the rein-deer; another, in the noses of sheep; another still, in the intestinal tube, or the throat of horses. Nay, even insects themselves are generally surrounded with the eggs of other insects; so that there is, perhaps, no animal to be found, but what affords both lodging, and nourishment, and food, to other animals: even man himself, the haughty lord of this lower world, is not exempt from this general law.

We shall next call the reader's attention to some particulars respecting the FORMATION OF ANIMALS.

Whatever matter may be in itself as to its essence, it is certain that it appears to our senses as various and heterogeneous: however, the modus of the formation of animals is still unknown. The inspired writers express themselves here, at least, according to the capacity of the learned, as well as the vulgar, when they acknowledge the ignorance of mankind,how the bones do at first grow in their embryo state, and that we are fearfully and wonderfully made, when we are fashioned secretly in the lower parts of the earth. However, it seems not probable, that one part of matter acting upon another, should produce animal existence, though we grant. it may have a strange and unaccountable power in the alteration of matter purely insensible or inanimate. Fermentation may dilate, and extremely alter the parts of animated matter, when they are delineated and marked out by the finger of the Almighty; but still, matter being a principle purely passive and irrational, we cannot conceive how it should become an animal, any more than a world, it being much more easy for stones to leap out of a quarry, and make an Escurial, without asking the architect's leave, or calling for the mason, with his mortar and trowel, to assist them.