A young woman of eighteen years of age, a hired servant in the family of Mrs. Elizabeth Smith, had been subject to a head-ach every spring for several years. The unusually warm days which occurred in the beginning of April, 1793, produced a return of this periodical pain. On the eighth of the month, it was so severe as to confine her to her bed. I was called to visit her on the ninth. I found her comatose, and, when awake, delirious. Her pupils were unusually dilated, and insensible to the light. She was constantly sick at her stomach, and vomited frequently. Her bowels were obstinately costive, and her pulse was full, tense, and so slow as seldom to exceed, for several days, from 56 to 60 strokes in a minute. I ordered her to lose ten ounces of blood every day, for three days successively, and gave her, on each of those days, strong doses of jalap and aloes. The last blood which was drawn from her was sizy. The purges procured from three to ten discharges every day from her bowels. On the 12th, she appeared to be much better. Her pulse was less tense, and beat 80 strokes in a minute. On the 14th, she had a fainting fit. On the 15th, she sat up, and called for food. The pupils of her eyes now recovered their sensibility to light, as well as their natural size. Her head-ach left her, and, on the 17th, she appeared to be in good health. Her pulse, however, continued to beat between 50 and 60 strokes in a minute, and retained a small portion of irregular action for several days after she recovered. I am the more disposed to pronounce the cases which have been described to have been internal dropsy of the brain, from my having never been deceived in a single case in which I have examined the brains of patients whom I have suspected to have died of it. I could add many other cases to those which have been related, but enough, I hope, have been mentioned to establish the safety and efficacy of the remedies that have been recommended. I believe, with Dr. Quin, that this disease is much more frequent than is commonly supposed. I can recollect many cases of anomalous fever and head-ach in children, which have excited the most distressing apprehensions of an approaching internal dropsy of the brain, but which have yielded in a few days to bleeding, or to purges and blisters. I think it probable, that some, or perhaps most of these cases, might have terminated in an effusion of water in the brain, had they been left to themselves, or not been treated with the above remedies. I believe further, that it is often prevented by all those physicians who treat the first stage of febrile diseases in children with evacuations, just as the pulmonary consumption is prevented by bleeding, and low diet, in an inflammatory catarrh.