Man is placed on this globe as a radius,--a detached radius. The axis of his body is part of the diameter of the earth, and divides him into symmetrical halves. A line, that passes at an equal distance through the double organs, also divides the single ones into two equally-arranged portions. We possess two eyes, to receive the impression of light; two ears, to be touched simultaneously by the waves of sound; two tubes are opened, to receive the refined, imponderable bodies producing odour; the lips are grouped round a marked central line to the chin. We have two shoulders, two arms, two hands, two legs, two feet; both hands have the same number of fingers, and both feet the same number of toes. On the other hand, the parts, taken by themselves, break through all the laws of symmetrical uniformity. The arms are longer than the trunk; the legs are longer than the arms; hands end in unequally-subdivided fingers; feet in similarly-treated toes. But notwithstanding this want of symmetry there is perfect harmony in the relations of the parts to the whole, so that man may be said to be the very master-piece of creation. In considering the controlling linear elements, in the three grand groups into which humanity may be best divided for a comprehensive study of art, we find that the very fundamental facial lines differ. I. We have first the Negro, the fossil, the _black_, or antediluvian man. The eyes, nostrils, and lips are drawn downwards in melancholy lines. He is cross-toothed (_prognathous_), triangular-headed, has flat feet, long heels, an imperfect pelvis, but a very powerful digestive organ, and a correspondingly enormous mouth. [Illustration]