diseased, and the alcoholic are more apt to succumb, also the newborn. It is a curious fact that cure of malignant growths (sarcoma), chronic skin diseases, and old ulcers sometimes follows attacks of erysipelas. =Treatment.=--The duration of erysipelas is usually from a few days to about two weeks, according to its extent. It tends to run a definite course and to recovery in most cases without treatment. The patient must be isolated in a room with good ventilation and sunlight. Dressings and objects coming in contact with him must be burned or boiled. The diet should be liquid, such as milk, beef tea, soups, and gruels. The use of cloths wet constantly with cold water, or with a cold solution of one-half teaspoonful of pure carbolic acid to the pint of hot water, or with a poisonous solution of sugar of lead, four grains to the pint, should be kept over small inflamed areas. Fever is reduced by sponging the whole naked body with cold water at frequent intervals. A tablespoonful of whisky or brandy in water may be given every two hours to adults if the pulse is weak. Painting the borders of the inflamed patch with contractile collodion may prevent its spreading. The patient must be quarantined until all scaling ceases, usually for two weeks. CHAPTER III =Malaria and Yellow Fever= _The Malarial Parasite--Mosquitoes the Means of Infection--Different Forms of Malaria--Symptoms and Treatment--No Specific for Yellow Fever._ =MALARIA; CHILLS AND FEVER; AGUE; FEVER AND AGUE; SWAMP OR MARSH FEVER; INTERMITTENT OR REMITTENT FEVER; BILIOUS FEVER.=--Malaria is a communicable disease characterized by attacks of fever occurring at certain intervals, and due to a minute animal parasite which inhabits the body of the mosquito, and is communicated to the blood of man by the bites of this insect. In accordance with this definition malaria is not a contagious disease in the sense that it is acquired by contact with the sick, which is not the case, but it is derived from contact with certain kinds of mosquitoes, and can be contracted in no other way, despite the many popular notions to the contrary. Mosquitoes, in their turn, acquire the malarial parasite by biting human beings suffering from malaria. It thus becomes possible for one malarial patient, coming to a region hitherto free from the disease, to infect the whole district with malaria through the medium of mosquitoes. =Causes.=--While the parasite infesting mosquitoes is the only direct cause of malaria, yet certain circumstances are requisite for the life and growth of the mosquitoes. These are moisture and proper temperature, which should average not less than 60 deg. F. Damp soil, marshes, or bodies of water have always been recognized as favoring malaria.