But still more distinct evidence of its being indeed the expression of happiness to which we look for our first pleasure in organic form, is to be found in the way in which we regard the bodily frame of animals: of which it is to be noted first, that there is not anything which causes so intense and tormenting a sense of ugliness as any scar, wound, monstrosity, or imperfection which seems inconsistent with the animal's ease and health; and that although in vegetables, where there is no immediate sense of pain, we are comparatively little hurt by excrescences and irregularities, but are sometimes even delighted with them, and fond of them, as children of the oak-apple, and sometimes look upon them as more interesting than the uninjured conditions, as in the gnarled and knotted trunks of trees; yet the slightest approach to anything of the kind in animal form is regarded with intense horror, merely from the sense of pain it conveys. And, in the second place, it is to be noted that whenever we dissect the animal frame, or conceive it as dissected, and substitute in our ideas the neatness of mechanical contrivance for the pleasure of the animal; the moment we reduce enjoyment to ingenuity, and volition to leverage, that instant all sense of beauty disappears. Take, for instance, the action of the limb of the ostrich, which is beautiful so long as we see it in its swift uplifting along the desert sands, and trace in the tread of it her scorn of the horse and his rider, but would infinitely lose of its impressiveness, if we could see the spring ligament playing backwards and forwards in alternate jerks over the tubercle at the hock joint. Take again the action of the dorsal fin of the shark tribe. So long as we observe the uniform energy of motion in the whole frame, the lash of the tail, bound of body, and instantaneous lowering of the dorsal, to avoid the resistance of the water as it turns, there is high sense of organic power and beauty. But when we dissect the dorsal, and find that its superior ray is supported in its position by a peg in a notch at its base, and that when the fin is to be lowered, the peg has to be taken out, and when it is raised put in again; although we are filled with wonder at the ingenuity of the mechanical contrivance, all our sense of beauty is gone, and not to be recovered until we again see the fin playing on the animal's body, apparently by its own will alone, with the life running along its rays. It is by a beautiful ordinance of the Creator that all these mechanisms are concealed from sight, though open to investigation, and that in all which is outwardly manifested we seem to see his presence rather than his workmanship, and the mysterious breath of life, rather than the manipulation of matter.