means of subsistence to distant generations of the species. Such is the wonderful economy of Providence; and this, let it be remarked, in passing, is only one instance of a kind of contrivance extensively employed, which we shall afterwards have occasion to notice.

We have mentioned the common squirrel as another example of the storing tribe. This agile and interesting creature takes up its residence in our woods and forests, and, during the last month of autumn, is exceedingly industrious in collecting for itself a hoard of nuts, acorns, and other kinds of food, which it carefully deposits in a storehouse, scooped out with some labor, in a well-chosen place of concealment, among the large and embowering branches of a shaggy old tree. Here it takes up its winter abode, prudently abstaining from the violation of its little magazine, as long as it can find the means of subsistence in its neighborhood.

But of all the quadrupeds which provide for their preservation during winter, by laying up a stock of food, there are none so wonderful as the beavers. A branch of this amphibious family was at one time to be found in Britain; and beavers are still natives of some northern countries in Europe, though their chief residence is in the wilds of America. They have long attracted the admiration of mankind by their extraordinary habits. Some of our most celebrated naturalists, indeed, fired by the exaggerated accounts of travellers, have launched out into encomiums on their wonderful faculties, which a more accurate knowledge of their operations has of late considerably modified. After every allowance, however, for the natural propensity of men to add astonishment to the wonderful, we find enough in the most sober and authentic accounts given of this quadruped, to excite our surprise.

The form of the beaver does not appear to be peculiarly well fitted for performing works of skill and labor. It is described as not exceeding three feet in length; its paws are said to be about the size of a crown piece; and its tail, though, by its breadth and flatness, answering some important purposes, seems to be limited in power as an instrument of labor, by having naturally

such an inclination downward, that it can with difficulty be brought on a line with its back. Yet this apparently weak and ill-furnished creature, is represented as supplying, by its ingenuity, the seeming defects in its bodily form, and constructing works for the comfort and convenience of its winter residence, which, in reference to its more contracted wants, rival the skill and science of a human architect! The following notice of the manner in which these animals provide against the inclemency of the winter season, is abridged from a judicious article in the Edinburgh Encyclopedia.

"Towards autumn, they quit their roving way of life, form themselves into communities, and, instructed by that admirable instinct of which we have so many examples in the history of the animal creation, begin to provide for the wants of a season, whose duration and inclemency would effectually preclude a regular supply of their accustomed nourishment.

"The winter-quarters of the beavers are situated on the banks of a river or creek, or, where these are not to be found, on the edge of a lake or pond. In selecting the exact spot where they may form their houses, they appear to be guided by two considerations, viz.-a sufficient depth of water, to prevent its being completely frozen; and the existence of a current, by means of which, they can readily convey wood and bark to their habitations. To prevent the water from being drained off, when the frost has stopped the current towards its source, the beavers construct a dam across the stream; and, in this work, they certainly display wonderful sagacity, skill, and perseverance. The dam is constructed of drift-wood, branches of willows, birch, and poplar, stones, and mud, brought by the beavers in their mouths, or between their paws, and not, as many have asserted, on their tails. If the current be slow, the dam runs straight across; but if the stream be rapid, the dam is formed with a regular curve, having the convexity towards the current, so as effectually to resist the force of the water and ice, that rush down during the storms of winter, or the thaws that take place in spring. These dams are

several feet in thickness, and of such strength, when completely formed, that a man can walk along them with perfect safety.

Having completed their dam, they proceed to construct their cabins. These are partly excavations in the ground, though their roofs form a sort of vaulted dome that rises a little above the surface. The houses have seldom more than one apartment, and never more than one floor, which is raised in the middle, to allow of the inhabitants eating and sleeping in a dry situation. The principal entrance and outlet to these houses, is next the water, on the very edge of which they are constructed; and the opening always slopes towards the water, till it terminates so far below its surface, as to preserve a free communication in the most severe frosts. There appears to be another, though smaller, opening next the land. The houses are of various sizes, in proportion to the number of inhabitants, which seldom exceeds ten or twelve, though sometimes double that number has been found in the same dwelling. Many of these houses stand together along the margin of the water, forming a village of from ten to thirty tenements.

"During the latter end of summer, the beavers cut down their wood and collect their roots. The latter are kept in the water, whence they fetch them as occasion may require. In eating, they sit on their rump like a squirrel, with their tail doubled in between their hind legs, and holding their food between their paws. When disturbed, they utter a peculiar cry, and plunge into the water, flapping the ground and the water with their tail."

The faculty of storing is also to be found, as we have previously stated, among insects, of which the example of the honey-bee is the most striking. The habits of this wonderful insect, the large and orderly community in which it lives, yielding undeviating fealty to a female sovereign; the mathematical precision with which it builds its cell; its unwearying industry; its wise foresight; its colonizing propensity,-have already been described in speaking of the hybernating instincts of the

insect creation. In studying its operations, as well as that of the beaver, and indeed of the other storing animals, we seem to get still deeper insight into the nature of that mysterious faculty, which, resembling reason in so many particulars, yet differs from it in this, that its impulses are uniform and unchangeable, belonging nearly in equal perfection in all ages, and under all circumstances, to every individual of the species; not capable of improvement by education, but regulated by propensities directed by a wisdom of which the species is not conscious, to the attainment of a future object, which they have not forethought to contemplate.* What is this but the impress of the finger of God?

*Mr. Broderip gives a curious and interesting account of the habits of a tame beaver, brought to England, in 1825, which seems to illustrate the distinctive difference subsisting between reason and instinct, even where they appear to make the nearest approach. This little creature was still very young when let out of his cage, but immediately showed his building instinct. He began by selecting the longest materials within his reach, such as sticks, sweeping-brushes, &c., which he piled up in such a way that one end touched the wall, and the other projected into the room. "As the work grew high, he supported himself upon his tail, which propped him up admirably; and he would often, after laying on one of his building materials, sit up over against it, apparently to consider his work, or, as the country people say, 'judge it.' This pause was sometimes followed by changing the position of the material 'judged,' and sometimes it was left in its place. After he had piled up his materials in one part of the room, (for he generally chose the same place,) he proceeded to wall up the space between the feet of a chest of drawers which stood at a little distance from it, high enough on its legs to make the bottom a roof for him, using for this purpose, dried turf and sticks, which he laid very even, and filling up the interstices with bits of coal, hay, cloth, or any thing he could pick up. This last place he seemed to appropriate for his dwelling; the former work seemed to be intended for a dam. When he had walled up the space between the feet of the chest of drawers, he proceeded to carry in sticks, cloth, hay, cotton, and to make a nest; and, when he had done, he would sit up under the drawers, and comb himself with the nails of his hind feet."

It is scarcely necessary to say, that there was, in the case of this tame beaver, a propensity evinced to construct, where the object of the propensity no longer existed. The Author of its being, had bestowed on it this instinct, for the use of the species in its wild state; and, being destitute of the reasoning power which would have taught it the needlessness of the trouble it was taking, it still continued not only to build its house, and line its nest, where it was already sheltered and comfortable, but to construct a dam where there was no water.

TENTH WEEK-WEDNESDAY.

HYBERNATION.-TORPIDITY OF ANIMALS.

AMONG the contrivances by which the Author of Nature enables the lower animals to sustain the privations of winter, that by which they are endowed with the faculty of becoming insensible to external objects, and of approaching a state of temporary death, is very worthy of attention. The ordinary phenomena of sleep have long been a subject of deep curiosity to the philosophical inquirer. The torpidity of animals during the cold season, in some respects, resembles this state; but there is a marked difference not only in the period of insensibility, and in the wise intentions of Providence which it fulfils, but also in the nature of this provision, as it affects the bodily frame, as well as in other particulars.

The subject of torpidity has given rise to several ingenious experiments, by which some curious facts have been elicited. It is not our object to record these, but merely to give a succinct view of their results, in so far as they throw light on the operations of that Divine Being, from whose wisdom and goodness they derive their origin.

The classes of animals, among whom this kind of hybernating principle is found, are very various, viz. quadrupeds, reptiles, insects, perhaps fishes, and, according to some, even birds. Among quadrupeds, the species which are known to become torpid, belong exclusively to the digitated order. A few of these species are of the class primates, such as the bat; and of the class feræ, such as the hedgehog; but the most numerous instances occur among the glires, of which the dormouse and the marmot are familiar examples.

Attempts have been made, but without much success, to ascertain the causes on which torpidity depends. It