OCR Text |
Show spots ire known as freckles. Their remote re-mote cause is a peculiarly sensitive skin; thfeir direct cause is the light and heat of the sun. Persons with fair skin and hair are most subject to them. The pigment, pig-ment, which m others is uniformly distributed, dis-tributed, seems to gather into small rounded spots. Youth's Companion. Discoloration of the Skin. Between the cuticle the epidermis, that is, or scarfskin and the true skin is a layer of cells which secreto from tho blood a dark coloring matter. The black races have this feature most fully developed, but even the lightest are not wholly destitute of it. Its comploto absence characterizes the albino, giving us occasionally a chalk whito negro, the hair, of course, participating partici-pating in the defect. As this pigment is also wanting in the albino's choroid coat of the eye normally a dark background back-ground for the retina, and essential to clear vision he is nearly blind except at ui;ht There is often a local absence of pigment, pig-ment, causing white patches on the limbs and different parts of the body. Such a patch on the head may give rise . to a solitary white lock amid a full head of dark hair. Some parte of the skin are naturally darker than the rest, and the darker color may extend far beyond the usual limit and still be purely physiological, but dark colored spots often appear on the body as a result of some diseased condition or of exciting causes. The simplest and commonest of such .... . . .. |