Though the eye, when put in motion, seems to be drawn towards either side, yet it only moves round its centre; by which its coloured part moves nearer, or farther from the angle of the eye-lids, and is thus elevated or depressed. The distance between the eye is less in man than in any other animal; in some it is so great that it is almost impossible that they should ever view the same object with both eyes at once. Next to the eyes, that which gives most character to the face are the eye-brows, which being, in some measure, totally different from the other features, their effect is most readily distinguished. The eye-lashes have an effect in giving expression to the eye, particularly when long and close, they soften its glances, and improve its sweetness. Man and apes are the only animals that have eye-lashes both upon the upper and lower lids, all other animals want them on the lid below, and even man has less on the under than on the upper. The eye-lids serve to guard the ball of the eye, and to furnish it with a proper moisture. The upper lid rises and falls; the lower has scarce any motion; and though their being moved depends on the will, yet the will is unable to keep them open when sleep, or fatigue, oppresses the mind. In birds and amphibious quadrupeds the lower lid alone has motion; and fishes and insects have no eye-lids whatsoever. The forehead makes a large part of the face, and chiefly contributes to its beauty. It ought to be justly proportioned, neither too round nor too flat, neither too narrow nor too low, and it should be regularly surrounded with the hair. The hair tends greatly to improve the face, and baldness takes away from beauty. Borrowed locks, however, do not justly supply the place of real ones, as the true character cannot be so well traced in the countenance when the one is substituted for the other. The highest part of the head, and that immediately above the temples, first becomes bald; the hair under the temples, and at the back of the head, is seldom known to fail. It has been observed by some authors that baldness was peculiar to man, and that it never happens to women in the most advanced periods of life. The hair is, in general, thickest where the constitution is strongest, and more glossy and beautiful where the health is most permanent. The ancients supposed the hair to be produced like the nails, the part next the root pushing out that immediately contiguous. But the moderns have found that every hair may be truly said to live and to receive nutriment like other parts of the body. The roots do not turn grey sooner than the extremities, but the whole hair changes colour nearly at the same time, and we have many instances of persons who have grown grey in one night's time. When turned white it gradually loses its strength and falls off. Aristotle asserts, that no man ever became bald previous to his intercourse with women.