Gynecology is the study of diseases peculiar to women. As woman possesses organs which man has not, and as the parts--physiological and social--that she plays in life differ from those played by man, we should expect to find her afflicted with a certain number of diseases, peculiar to her, which are dependent upon her anatomy, physiology, and mode of life. Such diseases occur in barbarous as well as in civilized women; and similar diseases, peculiar to the female, occur in the lower animals. Thus, in the cow and the mare we find tumors of the vagina, prolapse of the vagina and uterus, fibroid tumors, sarcoma and cancer of the uterus, and some forms of ovarian cysts. Cysts of the tubes and the ovaries are exceedingly common in old mares; cats and goats are similarly affected. From a pathological point of view, however, the civilized woman unfortunately differs from her barbarous sister, and from the female of the lower animals, in many important particulars. She is more liable to the pathological conditions which, more or less, all females have in common. These conditions appear in a more severe form, and are followed by more disastrous results, in the civilized than in the barbarous state. The female among the lower animals and among savages seems to be about equal in proportionate strength and physical endurance to the male, though in size and in gross muscular strength she may be his inferior. Her subordinate position is often due not so much to any difference in strength as to the fact that the male possesses weapons--as the horns of the deer--with which nature has not endowed the female; and though she is liable to more diseases than the male, yet her relative position does not seem to be materially altered by this fact. The bitch is as enduring as the dog. The female grizzly is as ferocious and as dangerous as the male. The mare is as fast as the horse. The squaw among the American Indians can lift and carry burdens which the lazy buck would not attempt. How different it is with the civilized woman, as we know her in this country! The average healthy woman in this country is very much inferior in physical strength and endurance to the average man, and this inferiority is tremendously increased when she becomes sick from any of the diseases to which her sex is liable. The increased liability of the civilized woman to disease is in a large measure due to her poor physique. But this is not all. The causes of many of the diseases with which the gynecologist has to deal cannot be traced so easily. Fibroid tumors of the uterus, which are so common among the colored women of this country, are said by Tait to be unknown among their African cousins, who are removed by but a few generations. The most common causes of diseases of women are injuries received during parturition; sepsis; venereal diseases; errors of development; improper mode of life and clothing during the period of development; neglect during menstruation; and celibacy.