Whenever it commences the girl acquires a more womanly appearance. It is a secretion of the uterus, or, in other words, the minute vessels distributed to the inner coat of uterus, select as it were, from the blood, and pour out in a gradual manner the materials of this fluid. It has one of the properties, color, of blood, but it does not coagulate, or separate into different parts like blood, and cannot properly be called blood.** * Dr. Chavasse, on p. 94 of his "Advice to a Wife" published by W. H. Smith & Son gives instances of very early menstruation and consequent fecundity.--Publishers' note, ** "The menstrual discharge," says Dr. Kirkes, "consists of blood effused from the inner surface of the uterus, and mixed with mucus from the uterus, vagina, and the external parts of the generative apparatus. Being diluted by this admixture, the menstrual blood coagulates less perfectly than ordinary blood; and the frequent acidity of the vaginal mucus tends still further to diminish its coagulability."-- Handbook of Physiology, 8th ed., p. 727, 1874.--G. R. When this discharge is in all respects regular, it amounts in most females to six or eight ounces, and from two to four days' continuance. During its continuance the women is said to be unwell, or out of order. Various unpleasant feelings are liable to attend it; but when it is attended with severe pain, as it not infrequently is, it becomes a disease, and the woman is not likely to conceive until it is cured. During the existence of the "turns," or "monthlies," as they are often called, indigestible food, dancing in warm rooms, sudden exposure to cold or wet, and mental agitations, should be avoided as much as possible. The "turns" do not continue during pregnancy, nor nursing, unless nursing be continued after the "turns" recommence. Some women, it is true, are subject to a slight hemorrhage that sometimes occurs with considerable regularity during pregnancy, and which has led them to suppose they have their turns at such times; but it is not so; the discharge at such times is real blood.* * Consult on the whole of this Dr. Chavasse's book, pp. 91- 101, where full details are given.--Publishers' note.