_View of Descartes._--Descartes, perceiving the error of previous philosophers, went to the opposite extreme, and resolved the instinct and action of the brute into mere mechanism, a principle little different from that by which the weight moves the hands of the clock. The brute performs the functions of his nature and organization, just as the puppet moves hither and thither by springs hidden within, of which itself knows nothing. The bird, the bee, the ant, the spider, are so organized, such is the hidden mechanism of their curious nature, that at the proper times, and under the requisite conditions, they shall build, each its own proper structure; and perform, each, its own proper work and office. So doing, each moves automatically, mechanically. _Locke and his Disciples._--Differing, again, from this view, which certainly ascribes too little, as the opposite theory ascribes too much to the brute, Locke, Condillac, and their disciples in France and England, took the ground that the actions of the brute which seem to indicate intelligence, are to be ascribed to the power of habit, and to the law of association. The faculties of the brute, as indeed of man, resolve themselves ultimately into impressions from without. Nothing is innate. The dog scents his prey, and the beaver builds his dam, and the bird migrates to a warmer clime, from the mere force of habit, unreflecting, unintelligent. But how, it may occur to some one to ask, happens such a habit to be formed in the first place? How happens the poor insect, just emerging from the egg, to find in himself all requisite appliances and instruments for capturing his prey? How happens the bee always, throughout all its generations, to hit upon the same contrivance for storing its honey, and not only so, but to select out of a thousand different forms, and different possible angles, always the same one? And so of the ant, the spider, etc. And if this is a matter of education, as it certainly is not, then how came the first bee, the first ant, spider, or other insect, to hit upon so admirable an expedient? _The Scotch Philosophers._--On the other hand, Reid, Stewart, and the Scotch philosophers generally, departing widely from the merely mechanical view, have ascribed to instinct some actions which are properly automatic and involuntary, as the shutting of the eyelid on the approach of a foreign body, the action of the infant in obtaining its food from the mother's breast, and certain other like movements of the animal organization, which, according to recent discoveries in physiology, are to be attributed, rather to the simple reflex action of the nerves and muscles. This is not properly instinct.