1. The first step which should be taken for the prevention of disease, is to make provision for the health of the unborn child. Greater care should be exercised with women who are in a way to become mothers. Those who are surrounded by all the luxuries which health can bestow, indulge too much in rich food, and take too little exercise; while the poor get too little nourishment, and work too hard and too long. A woman in this condition should avoid over-exertion, and all scenes which excite the passions or powerful emotions. She should take moderate exercise in the open air; eat moderately of wholesome food, and of meat not oftener than twice a day; take tea or coffee in limited quantities, and avoid the use of all alcoholic liquors; she should go to bed early and take not less than nine hours sleep; her clothing should be loose, light in weight, and warm. She should take every precaution against exposure to contagious or infectious diseases.

2. There is no better method for preventing the spread of contagious diseases than perfect isolation of the infected, and thorough disinfection of all articles of clothing or bedding which have been in contact with the infected. Many persons erroneously believe that every child must necessarily have the measles, and other contagious diseases, and they, therefore, take no precautions against the exposure of their children. The liability to infection diminishes as age advances, and those individuals are, as a rule, the strongest and best developed who have never suffered from any of the contagious diseases. Although, vaccination is the great safeguard against-pox, yet it should never prevent the immediate isolation of those who are suffering from this disease.

3. To avoid the injurious effects of impure air, the following rules, should be carefully observed. The admission of air which contains anything that emits an unpleasant odor into closed rooms should be avoided. The temperature of every apartment should be kept as near 70° Fahr. as possible, and the air should not be overcharged with watery vapor. Provisions should be made for the free admission into and escape of air from the room at all times. When an apartment is not in use, it should be thoroughly ventilated by opening the windows. Those who are compelled to remain in an atmosphere tilled with dust, should wear a cotton-wool respirator.

4. To insure a healthy condition of the body, the diet of man ought to be varied, and all excesses should be avoided. The total amount of solid food taken in the twenty-four hours should not exceed two and a half pounds, and not more than one-third of this quantity should consist of animal food. Many persons do not require more than one pound and a half of mixed food. To avoid parasitic diseases, meat should not be eaten rare, especially pork. The amount of drink taken should not be more than three pints in twenty-four hours. The excessive use of tea and coffee should be avoided. Pickles, boiled cabbage, and other indigestible articles should never be eaten.

5. To avoid the evil effects of alcoholic liquors, perfect abstinence is the only safe course to pursue. Although one may use spirituous liquors in moderation for a long period of time and possibly remain healthy, yet such an indulgence is unnecessary and exceedingly dangerous. A person who abstains entirely from their use is safe from their pernicious influence; a person who indulges ever so moderately is in danger; a person who relies on such stimulants for support in the hour of need is lost.

6. While the use of tobacco is less pernicious than alcohol in its effects, et it exerts a profound disturbing influence upon the nervous system, and gives rise to various functional and organic diseases. This is the verdict of those who have given the subject the most study, and who have had the best opportunities for extensive observation. Suddenly fatal results have followed excesses in the use of tobacco. Therefore, the habit should be avoided, or if already acquired, it should be immediately abandoned.

7. The clothing should be light and porous, adapted in warmth to the season. It is especially important that persons in advanced life should be well protected against vicissitudes of heat and cold. Exposure is the cause of almost all those inflammatory diseases which occur during winter, and take off the feeble and the aged. The under-garments should be kept scrupulously clean by frequent changes. Corsets or bands which impede the flow of blood, compress the organs of the chest or abdomen, or restrict the movements of the body, are very injurious, and should not be worn. Articles of dress which are colored with irritating dye-stuffs, should be carefully avoided.

8. It matters not how varied a person's vocation may be, change, recreation, and rest are required. It is an error to suppose that more work can be done by omitting these. No single occupation which requires special mental or physical work, should be followed for more than eight hours out of the twenty-four. The physical organism is not constructed to run its full cycle of years and labor under a heavier burden than this. Physical and mental exercise is conducive to health and longevity, if not carried too far. It is erroneous to suppose that excessive physical exertion promotes health. Man was never intended to be a running or a jumping machine. In mental work, variety should be introduced. New work calls into play fresh portions of the brain, and secures repose for those parts which have become exhausted. Idleness should be avoided by all. Men should never retire from business as long as they enjoy a fair degree of health. Idleness and inactivity are opposed to nature.

9. The average length of time which a person ought to sleep is eight hours out of the twenty-four, and, as a rule, those who take this amount enjoy the best health. The most favorable time for sleep is between the hours of 10 P.M. and 6 A.M. All excitement, the use of stimulants, and excessive fatigue tend to prevent sleep. Sleeping rooms should be well ventilated, and the air maintained at a equable temperature of as near 60° Fahr. as possible. An inability to sleep at the proper time, or a regular inclination to sleep at other than the natural hours for it, is a certain indication of errors of habit, or of nervous derangement.

10. Prominent among all other measures for the maintenance of Health, is personal cleanliness. Activity in the functions of the skin is essential to perfect health, and this can only be secured by thoroughly bathing the entire body. Strictly, a person should bathe once every twenty-four or forty-eight hours. The body should be habituated to contact with cold water at all season of the year, so that warm water may not become a necessity. The simplest and most convenient bath, is the ordinary sponge-bath. An occasional hot-air, or Turkish bath, exerts a very beneficial influence. It cleans out the pores of the skin and increases its activity.

11. The emotions and the passions exert a powerful influence over the physical organism. It is important, therefore, that they be held under restraint by the reasoning faculties. This rule applies equally to joy, fear, and grief; to avarice, anger, and hatred; and, above all, to the sexual passion. They are a prolific source of disease of the nervous system, and have caused the dethronement of some of the most gifted intellects.