_Order and Proportion._--Shall we then, with Aristotle. Augustine, Andrè, and others, ancient and modern, seek the hidden principle of beauty in the elements of _order and proportion_? What are order and proportion? Order is the arrangement of the several parts of a composite body. Proportion is the relation of the several parts to each other in space and time. Not every possible arrangement is order, but only that which appears conducive to the end designed, and not every possible arrangement of parts is proportion, but only that which furthers the end to be accomplished. To place the human eye in the back part of the head, the limbs remaining as they now are, would be _disorder_, for motion must in that case, as now, be forward, while the eye, looking backward, could no longer survey the path we tread. The limbs of the Arabian steed, designed for swiftness of locomotion, bear a proportion to the other parts of the body, somewhat different from that which the limbs of the swine, designed chiefly for support, and for movements slower, and over shorter distances, bear to his general frame. The proportion of each, however, is perfect as it is. Exchange each for each, and they are quite out of proportion. _Only another Form of the Useful._--Since order and proportion, then, have always reference to the end proposed to be accomplished, we have, in fact, in these elements, only another form of the useful, which, as we have already seen, is not the principle of beauty. _Not always Beautiful._--Accordingly, we find that order and proportion do not, in themselves, and when unassociated with other elements, invariably strike us as beautiful. The leg of the swine is as fine a specimen of order and proportion as that of the Arab courser, but is not so much admired for its beauty. It must be admitted, however, that these elements in combination, do with others, enter more or less fully into the formation of the beautiful, are intimately associated with its external forms. The absence or violation of these principles would mar the beauty of the object.