This consists of inflammation of the cerebral substance, and due to long exposure to a vertical sun, the inordinate use of ardent spirits, cold, fright, external injury, the sudden disappearance of an old discharge, and it sometimes occurs as a consequent on small-pox, or erysipelas of the face and scalp, and fevers. The symptoms are violent inflammatory fever, hot and dry skin, flushed countenance, suffused eyes, quick and hard pulse, the arteries of the neck throb, and delirium. The senses are morbidly acute, there being intolerance of light and sound. The person is extremely restless, the muscles of the face are spasmodically contracted, the upper eye-lids hang down, and as the disease progresses, blindness and deafness ensue. The countenance is vacant or idiotic, the eye loses its lustre, the pupils become dilated, and the eyes often squint. In the still more advanced stage, the discharges pass off involuntarily, the countenance becomes pale and sunken, the pulse weak and irregular, the coma more profound, and death soon closes the scene. It is commonly called "Brain Fever."

TREATMENT. -- This should be most energetic. Bleeding to fainting has been the practice of many physicians, but I deem it unnecessary, as revulsion can be made by other means. Leeches may, however, be applied to the scalp. The hair shold be closely shaved from the head, and ice, alcohol or ether, with water, applied to the head. The decoction of ladies' slipper should be given internally. At the outset purgatives should be given. Those that act thoroughly, such as gum bags, colocynth, etc., are the best. The bladder should be emptied every day. In the stage of collapse, stimulants may be given.