The college, in a memorial to the legislature of the state, asserted that the fever had been imported in two ships, the one from Havannah, the other from Port au Prince, and recommended, as the most effectual means of preventing its recurrence, a more rigid quarantine law. The gentlemen of the faculty of medicine, thirteen in number, in two letters to the governor of the state, the one in their private capacity, and the other after they had associated themselves into an "Academy of Medicine," asserted that the fever had originated from the putrid exhalations from the gutters and streets of the city, and from ponds and marshy grounds in its neighbourhood; also from the foul air of two ships, the one from Marseilles and the other from Hamburgh. They enumerated all the common sources of malignant fevers, and recommended the removal of them from the city, as the most effectual method of preventing the return of the fever. These sources of fever, and the various means of destroying them, shall be mentioned in another place. I proceed now to say a few words upon the treatment which was used in this fever. It was, in general, the same as that which was pursued in the fevers of 1793 and 1794. I began the cure, in most cases, by _bleeding_, when I was called on the first day of the disease, and was happy in observing its usual salutary effects in its early stage. On the second day, it frequently failed of doing service, and on the subsequent days of the fever, I believe, it often did harm; more especially if no other depleting remedy had preceded it. The violent action of the blood-vessels in this disease, when left to itself for two or three days, fills and suffocates the viscera with such an immense mass of blood, as to leave a quantity in the vessels so small, as barely to keep up the actions of life. By abstracting but a few ounces of this circulating blood, we precipitate death. In those cases where a doubt is entertained of such an engorgement of stagnating blood having taken place, it will always be safest to take but three or four ounces at a time, and to repeat it four or five times a day. By this mode of bleeding, we give the viscera an opportunity of emptying their superfluous blood into the vessels, and thereby prevent their collapsing, from the sudden abstraction of the stimulus which remained in them. I confine this observation upon bleeding, after the first stage of the disease, only to the epidemic of 1797. It was frequently effectual when used for the first time after the first and second days, in the fevers of 1793 and 1794, and it is often useful in the advanced stage of the common bilious fever. The different and contradictory accounts of the effects of bleeding in the yellow fever, in the West-Indies, probably originate in its being used in different stages of the disease. Dr. Jackson, of the British army, in his late visit to Philadelphia, informed me, that he had