Potassium Permanganate--This also makes a good solution, especially where there is a vaginal discharge. The special objection to this is that it stains the skin and clothing. This can be purchased in crystal form, and one teaspoonful dissolved in two quarts of water is the proper strength. Chinosol is highly recommended as a vaginal douche, as being less injurious to the membranes than bi-chloride. Salt solution--Mix four tablespoons of table salt in one quart of warm or cold water and dissolve thoroughly. This is good and cheap. Vinegar solution--Many peasants in Europe use vinegar as an antiseptic almost exclusively. One glassful to two quarts of water is the strength usually desired. Cider vinegar is preferred. Douche afterward with clear water. Cold water douche--This will sometimes remove the semen quite effectively without the aid of an antiseptic. But as the semen can hide itself away in the wrinkled lining of the vaginal cavity, the cold water will only impede its progress for a time. As soon as the warmth of the body revives its activity, the semen continues on its journey to meet the ovum. Every woman should possess a good two quart rubber douche bag called fountain syringe. Hang it high enough to insure a steady direct flow. Bulb syringes, such as the whirling spray syringes, have been found satisfactory by many women for the purpose of injecting antiseptic solutions. Directions with syringe. [Illustration: Fountain Syringe.] Some women use the douche before the sexual act as a preventive. If this is done, any astringent such as boric acid, alum, citric acid, hydro-chlorate of quinine used in the solution will do. Only a pint of solution is needed for this purpose, following the act a larger douche is used as a cleanser. This can also be allowed with the regular antiseptic douche. THE USE OF THE CONDOM OR "COTS." There is little doubt that a thorough douching of the genital passage with an antiseptic solution performed by skilled hands immediately after the sexual act would destroy the male sperm, and nothing else would be necessary. But there is always the possibility that the sperm has entered the womb before the solution can reach it. It is safer therefore to prevent the possibility of the contact of the semen and the ovum, by the interposition of a wall between them. One of the best is the condom or rubber "cot." These are made of soft tissues which envelope the male organ (penis) completely and serve to catch the semen at the time of the act. In this way the sperm does not enter the vagina.