Heat. Baths. Massage. Electricity. Counter-irritants. Food. Digitalis. Camphor. Musk. Valerian. Cannabis indica. Belladonna. Hyoscyamus. Stramonium. Phosphorus. Acids. Opium. NERVOUS SEDATIVES. Cold. Alcohol. Paraldehyde. Ether. Chloroform. Chloral. Butylchloral hydrate. Amyl nitrite. Opium and opiates. Bromides. Hops. Gelsemium. Conium. NERVOUS STIMULANTS. It may at first sight seem to be a contradiction in terms when it is asserted that sleep may result from the administration of a nervous stimulant. This does occur, but only indirectly, and as a consequence of a restoration of energy to those portions of the nervous system which serve to moderate the activity of the organ of the mind--the cortex of the cerebrum. _Heat_, for example, is an undoubted stimulant. When added to the body in quantity sufficient to overcome chilliness, it tends to equalize the circulation of the blood, and produces throughout the body a nervous equilibrium that prevents any particular organ or member from arousing the others to wakefulness. _Baths._--The application of heat in the form of a warm bath constitutes one of the most admirable means of tranquilizing the brain. Children who are restless at night are delightfully soothed by a warm bath every night and morning. The water should be of an _agreeable_ temperature--this is better than any exact figure upon the scale of a thermometer--and the bath should not last lounger than ten minutes. Similar baths exercise a happy effect upon adult patients who are moderately feverish, nervous, and wakeful. If strong enough, they may take a full bath at bedtime; but if too feeble to leave the bed, gentle sponging with warm water will prove most refreshing, and will usually be followed by restful sleep. The well-known derivative effects of hot foot baths scarcely need to be more than mentioned in this connection. Turkish baths form an invaluable adjuvant in the treatment of chronic cases of insomnia arising from rheumatic, gouty, and dyspeptic disorders of the health. The copious perspiration induced by the heated air of the hot chamber is depurative, while the cold douche and the massage with which the bath is concluded have a powerful effect to stimulate all the functions of the body. By this means the brain is enabled to resume a healthier mode of action, and sleep follows as a matter of course.