This disease is caused by the presence of a microbe, known as the "comma bacillus," which manufactures a virulent poison, called a ptomaine. Although the germs are taken into the system through the medium of the mouth and stomach, they only multiply in the bowels, which is proved by the fact that the vomit from a cholera patient contains none, while the discharges from the bowels abound with them. If the system is in perfect condition the germs are destroyed by the gastric juice in the stomach as soon as inhaled. If the stomach is out of order the bacilli escape into the intestines, where the fluids are alkaline (in which they thrive) and cholera is the result. The symptoms are, first a slight diarrhcea, almost painless, then tremors, vertigo and nausea. Griping pains and repressed circulation follow, then copious purging of the intestines, followed by discharges of a thin watery fluid, lividity of the lips, cold breath and an unquenchable thirst. TREATMENT. First flush the colon thoroughly with warm water every few hours. Next induce perspiration by means of the Turkish bath, but if the case has set in violently, and vomiting and cramps appear, use the "Cascade" promptly, and get the patient into bed as quickly as possible. Then take two heavy sheets, dip them in water as hot as can be borne, fold them and lay them over the chest and abdomen and cover up with blankets, tucking them in closely at the sides. Put a jug of hot water to the feet. In about ten minutes redip the sheets quickly and reapply. In fifteen or twenty minutes the perspiration will appear and the cramps will vanish. Take nothing into the stomach during the duration of the disease except moderate sips of cold water or pieces of ice, to quench the burning thirst. Use simple strengthening food (milk is best) until health is restored. All water should be boiled before using. CHOLERA MORBUS. The symptoms are similar to those of Asiatic cholera, but not so violent. The treatment is the same in principle. If there is a feeling of nausea take a warm water emetic. PERITONITIS Is an inflammation of the membrane covering the bowels, and is frequently caused by concussion or injury; sometimes it extends from adjacent organs, but in many instances it is caused by the breeding of worms in the hardened faecal accumulations in the colon. No matter what the cause may he, flush the colon vigorously with injections as hot as can be borne, and place bags of hops, steeped in hot vinegar, on the outside. This will soon reduce the inflammation and effect a cure. PNEUMONIA,