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in the bottom of pools and lakes, among the reeds and rushes; others still, who have made their observations with more attention and patience than either of the former, allow that the old swallows with their early brood do migrate; but that the latter hatches, which are incapable of distant flight, lay themselves up, and become torpid during the winter; and at the approach of spring, by the wonderful appointment of Nature, they come forth again with renewed life and activity. In these, and all other animals which become torpid in the winter, the peristaltic motion of the bowels ceases while they are dormant, so that they do not suffer by hunger. Dr. Lister remarks, concerning this class of animals, that their blood, when poured into a vessel, does not coagulate, like that of all other animals; and therefore is no less fit for circulation when they revive, than before.

The birds called moor-fowl, during great snows, work out paths for themselves under its surface, where they live in safety, and get their food. They moult in summer, so that about the latter end of August they cannot fly, and are therefore obliged to run in the woods; but then the blackberries and bilberries are ripe, from whence they are abundantly supplied with food but the young do not moult the first year, and therefore, though they cannot run so well, are enabled to escape danger by flight.

The migration of birds is not only a fact, but, as it relates to many kinds of them, is an useful fact to mankind. This remark applies to such of them as feed on insects, the number of which is so great, that if these birds did not destroy them, it would be almost impossible for us to live.

Of the various kinds of water-fowl that are known in Europe, there is hardly any but what, in the spring, are found to repair to Lapland. This is a country of lakes, rivers, swamps, and mountains, covered with thick and gloomy forests, that afford shelter during summer to these birds.

In these arctic regions, by reason of the thickness of the woods, the ground remains moist and penetrable, and the waters contain the larvæ of the gnat in innumerable quantities. The days there are long, and the beautiful and splendid meteors of the night indulge them with every opportunity of collecting so minute a food; at the same time, men are very sparingly scattered over that vast northern waste. Yet, Linnæus, that great explorer of nature, in his excursion to Lapland, was astonished at the myriads of water-fowl that migrated with him out of that country, which exceeded in multitude the army of Xerxes, covering, for eight whole days and nights, the surface of the river Calix! The surprise of Linnæus was occasioned by his supposing their support to be furnished chiefly by the vegetable kingdom, almost denied

to the Lapland waters; not knowing that the all-bountiful Creator had plenteously provided insect food for them in that dreary wilderness.

Certain beasts, also, as well as birds, become torpid, or at least inactive, when they are, by the rigour of the season, excluded from the necessaries of life. Thus the bear, at the end of autumn, collects a quantity of moss, into which he creeps, and there lies all the winter, subsisting upon no other nourishment than his fat, collected during the summer in the cellulous membrane, and which, without doubt, during his fast, circulates through his vessels, and supplies the place of food.

The hedge-hog, badger, and some kinds of mice, fill their winter quarters with vegetables, which they eat during mild weather in the winter, and sleep during the frosts. The bat seems cold and quite dead, but revives in the spring while most of the amphibious animals get into dens, or the bottom of lakes and pools.

Among other instances of the preservation of animals, we ought to mention that of the pole-cat of America, commonly called the squash or skink. This is a small animal of the weasel kind, which some of the planters of that country keep about their premises to perform the office of a cat. This creature has always a very strong and disagreeable smell, but when affrighted or enraged, it emits so horrible a stench, as to prevent any other creature from approaching it: even dogs in pursuit of it, when they find this extraordinary mode of defence made use of, will instantly turn, and leave him undisputed master of the field; nor can any attempts ever bring them to rally again. Kalm, as quoted by Buffon, says, "One of these animals came near the farm where I lived in the year 1749. It was in the winter season, during the night; and the dogs that were upon the watch, pursued it for some time, until it discharged against them. Although I was in bed a good way off, I thought I should have been suffocated; and the cows and oxen themselves, by their lowings, shewed how much they were affected by the stench."

Nor is even the serpent, in its various kinds, destitute of the care of the common Father of nature. This reptile, which has neither wings to fly, nor the power to run with much speed, would not have the means to take its prey, were it not endowed with superior cunning to most other creatures. In favour of the serpent, also, there is a terror attending its appearance, which operates with such power upon birds and other small animals, as often to cause them to fall an easy prey to it. Hence, probably, has arisen the fiction of the power of fascination, which has been confidently ascribed to the rattlesnake and some other serpents.

On the DESTRUCTION OF ANIMALS.

In considering the destruction of animals, we may observe that Nature is continually operating: she produces, preserves for a time, and then destroys all her productions. Man himself is subject to this general order; for he also, like other creatures, returns to the dust from whence he was taken.

This process of nature is marked even in the vicissitudes of the seasons. Spring, like the jovial, playful infancy of all living creatures, represents childhood and youth; for then plants spread forth their flowers, fishes play in the waters, birds sing, and universal nature rejoices. Summer, like middle age, exhibits plants and trees full clothed in green; fruits ripen; and every thing is full of life. But autumn is comparatively gloomy; for then the leaves fall from the trees, and plants begin to wither, insects grow torpid, and many animals retire to their winter quarters.

The day proceeds with steps similar to the year. In the morning every thing is fresh and playful; at noon all is energy and action; evening follows, and every thing is inert and sluggish.

Thus the age of man begins from the cradle; pleasing childhood succeeds; then sprightly youth; afterwards manhood, firm, severe, and intent on self-preservation; lastly, old age creeps on, debilitates, and, at length, totally destroys our tottering bodies.

But we must consider the destruction of animals more at at large. We have before observed, that all animals do not live on vegetables, but there are some which feed on animalcula; others on insects. Nay, some there are which subsist only by rapine, and daily destroy some or other of the peaceable kind.

The destruction of animals by each other, is generally in progression, the strong prevailing against the weak. Thus, the tree-louse lives on plants; the fly called musca amphidivora, lives on the tree-louse; the hornet and wasp-fly, on the musca amphidivora; the dragon-fly, on the hornet and wasp-fly; the larger spider, on the dragon-fly; small birds feed on the spider; and lastly, the hawk kind on the small birds.

In like manner, the monoculus delights in putrid waters; the gnat eats the monoculus; the frog eats the gnat; the pike eats the frog; and the sea-calf eats the pike.

The bat and the goat-sucker make their excursions only at night, that they may catch the moths, which at that time fly about in great quantities.

The woodpecker pulls out the insects which lie hid in the trunks of trees. The swallow pursues those which fly about in the open air. The mole feeds on worms and grubs in the earth. The large fishes devour the small ones. And perhaps

there is not an animal in existence, which has not an enemy to contend with.

Among quadrupeds, wild beasts are most remarkably pernicious and dangerous to others. But that they may not, by their cruelty, destroy a whole species, these are circumscribed within certain bounds: as to the fiercest of them, they are few in number, when compared with other animals; sometimes they fall upon and destroy each other; and it is remarked also, that they seldom live to a great age, for they are subject, from the nature of their diet, to various diseases, which bring them sooner to an end than those animals which live on vegetables. It has been asked, why has the Supreme Being constituted such an order in nature, that, it should seem, some animals are created only to be destroyed by others? To this it has been answered, that Providence not only aimed at sustaining, but also keeping a just proportion amongst all the species, and so preventing any one of them from increasing too much, to the detriment of men and other animals. For if it be true, as it assuredly is, that the surface of the earth can support only a certain number of creatures, they must all perish, if the same number were doubled or trebled.

There are many kinds of flies, which bring forth so abundantly, that they would soon fill the air, and, like clouds, intercept the light of the sun, unless they were devoured by birds, spiders, and other animals.

Storks and cranes free Egypt from frogs, which, after the inundation of the Nile, cover the whole country. Falcons clear Palestine from mice. Bellonius, on this subject, says, "The storks come to Egypt in such abundance, that the fields and meadows are quite white with them. Yet the Egyptians are not displeased with them, as frogs are generated in such numbers, that, did not the storks devour them, they would over-run every thing. Besides, they also catch and eat serpents. Between Belba and Gaza, the fields of Palestine are often injured by mice and rats; and were these vermin not destroyed by the falcons, that come here by instinct, the inhabitants could have no harvest."

The white fox is of equal advantage in the Lapland Alps; as he destroys the Norway rat, which, by its prodigious increase, would otherwise entirely destroy vegetation in that country.

It is sufficient for us to believe that Providence is wise in all its works, and that nothing is made in vain. When rapacious animals do us mischief, let us not think that the Creator planned the order of nature according to our private principles of economy; for the Laplander has one way of living, the European husbandman another, and the Hottentot differs from them both; whereas the stupendous Deity is one throughout

the globe; and if Providence do not always calculate according to our method of reckoning, we ought to consider this affair in the same light as when different seamen wait for a fair wind, every one with respect to the port to which he is bound: these we plainly see cannot all be satisfied.

We shall conclude this branch, by turning once more to Man, and tracing him through his progressive stages of decay, until death puts a final period to his earthly existence.

The human form has no sooner arrived at its state of perfection, than it begins to decline. The alteration is at first insensible, and often several years are elapsed before we find ourselves grown old. The news of this unwelcome change too generally comes from without; and we learn from others that we grow old, before we are willing to believe the report.

When the body is come to its full height, and is extended into its just dimensions, it then also begins to receive an additional bulk, which rather loads than assists it. This is formed of fat, which, generally, at about the age of forty, covers all the muscles, and interrupts their activity. Every exertion is then performed with greater labour, and the increase of size only serves as the forerunner of decay.

The bones also become every day more solid. In the embryo they are almost as soft as the muscles and the flesh, but by degrees they harden, and acquire their proper vigour; but still, for the purpose of circulation, they are furnished through all their substance with their proper canals. Nevertheless, these canals are of very different capacities during the different stages of life. In infancy they are capacious, and the blood flows almost as freely through the bones as through any other part of the body; in manhood their size is greatly diminished, the vessels are almost imperceptible, and the circulation is proportionably slow. But in the decline of life, the blood which flows through the bones, no longer contributing to their growth, must necessarily serve to increase their hardness. The channels which run through the human frame may be compared to those pipes that we see crusted on the inside, by the water, for a long continuance, running through them. Both every day grow less and less, by the small rigid particles which are deposited within them. Thus, as the vessels are by degrees diminished, the juices also, which circulate through them, are diminished in proportion; till at length, age, these props of the human frame are not only more solid, but more brittle.

in old

The cartilages, likewise, grow more rigid; the juices circulating through them, every day contribute to make thera harder, so that those parts which in youth are elastic and pliant, in age become hard and bony, consequently the motion of the joints must become more difficult. Thus, in old age,

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