+Cellulitis.+ In cellulitis, redness of the skin is not very pronounced and is late in appearing, following swelling, and not preceding it. It is essentially the same condition as a mild form of erysipelas. Its spread is heralded by red lines of lymphangitis, ascending from a wound (infected), swelling of glands, and fever. In slight cases, the lymphatics may dispose of the poison, and suppuration fails to occur. In severe cases septicema arises. Cellulitis is usually a result of infection not only with streptococci, but also with other pyogenic cocci. +Treatment.+ Incise and curet the wound and apply one of the wet dressings. (See chapter on same). +Actinomycosis.+ This is an infectious disease characterized by chronic inflammation, and is due to the presence in the tissues of the actinomyces, or ray fungus. At the point of inoculation arises an infective granuloma, around which inflammation of connective tissues occurs; suppuration eventually taking place. Inoculation in the mouth is by way of an abrasion of mucous membrane or through a carious tooth. The fungi may pass into the bones and joints, causing inflammation of the parts. The bones in actinomycosis enlarge and become painful; the parts adjacent are infiltrated and soften; pus forms and reaches the surface through fistulae and the skin is often involved secondarily. In actinomycosis the adjacent lymphatic glands are not involved. +Treatment.+ Free incision, if possible, otherwise incision, cauterizing with pure carbolic acid, and packing with iodoform gauze. Internally, large doses of iodide of potassium should be given, as this drug alone has cured many cases. +Trench Foot.+ This results from exposure to wet and cold in the trenches, and soldiers who were compelled to have their feet immersed in water for any length of time and were then exposed to cold, are afflicted with this condition. The symptoms are similar to frost bite and the prevention of frigorism (Trench Foot) is as follows: adequate feeding; perfect circulation; moderate exercise; good general health; and warm clothing, which all tend to give the body its maximum power of resistance to cold. It is obvious that anything that tends to impair the circulation and the nutrition of the tissues is favorable to the occurrence of frigorism. Tightness of the clothing of the extremities, such as tight boots, leggins, etc., is particularly detrimental. Heavy clothing and other equipment, by increasing fatigue, also has a predisposing influence.