Where blood-letting has failed of curing this disease, I am disposed to ascribe it to its being used less copiously than the disease required. If its relation to pneumonicula be the same in its cure, that I have supposed it to be in its cause, then I am persuaded, that the same excess in blood-letting is indicated in it, above what is necessary in phrenitis, that has been practised in pneumonicula, above what is necessary in the cure of an acute inflammation of the lungs. The continuance, and, in some instances, the increase of the appetite in the internal dropsy of the brain, would seem to favour this opinion no less in this disease, than in the inflammatory state of pulmonary consumption. The extreme danger from the effusion of water into the ventricles of the brain, and the certainty of death from its confinement there, is a reason likewise why more blood should be drawn in this disease, than in diseases of the same force in other parts of the body, where the products of inflammation have a prompt, or certain outlet from the body. Where the internal dropsy is obviously the effect of a fall, or of any other cause which acts _directly_ on the brain, there can be no doubt of the safety of very plentiful bleeding; all practical writers upon surgery concur in advising it. The late Dr. Pennington favoured me with an extract from Mr. Cline's manuscript lectures upon anatomy, delivered in London in the winter of 1792, which places the advantage of blood-letting, in that species of inflammation which follows a local injury of the brain, in a very strong point of light. "I know (says he) that several practitioners object to the use of evacuations as remedies for concussions of the brain, because of the weakness of the pulse; but in these cases the pulse is _depressed_. Besides, experience shows, that evacuations are frequently attended with very great advantages. I remember a remarkable case of a man in this [St. Thomas's] hospital, who was under the care of Mr. Baker. He lay in a comatose state for three weeks after an injury of the head. During that time he was bled _twenty_ times, that is to say, he was bled once every day upon an average. He was bled twice a day _plentifully_, but towards the conclusion he was bled more sparingly, and only every other day; but at each bleeding, there were taken, upon an average, about sixteen ounces of blood. In consequence of this treatment, the man perfectly recovered his health and reason." Local bleeding by cups, leaches, scarifications, or arteriotomy, should be combined with venesection, or preferred to it, where the whole arterial system does not sympathize with the disease in the brain.