I have compared a paroxysm of this fever to a sudden squall; but the disease in its whole course was like a tedious equinoctial gale acting upon a ship at sea; its destructive force was only to be opposed by handing every sail, and leaving the system to float, as it were, under bare poles. Such was the fragility (if I may be allowed the expression) of the blood-vessels, that it was necessary to unload them of their contents, in order to prevent the system sinking from hæmorrhages, or from effusions in the viscera, particularly the brain. 9. Such was the indomitable nature of the pulse, in some patients, that it did not lose its force after numerous and copious bleedings. In all such cases I considered the diminution of its frequency, and the absence of a vomiting, as signals to lay aside the lancet. The continuance of this preternatural force in the pulse appeared to be owing to the miasmata, which were universally diffused in the air, acting upon the arterial system in the same manner that it did in persons who were in apparent good health. Thus have I mentioned the principal circumstances which were connected with blood-letting in the cure of the yellow fever. I shall now consider the objections that were made to it at the time, and since the prevalence of the fever. It was said that the bleeding was unnecessarily copious; and that many had been destroyed by it. To this I answer, that I did not lose a single patient whom I bled seven times or more in this fever. As a further proof that I did not draw an ounce of blood too much it will only be necessary to add, that hæmorrhages frequently occurred after a third, a fourth, and in one instance (in the only son of Mr. William Hall) after a sixth bleeding had been used; and further, that not a single death occurred from natural hæmorrhages in the first stage of the disease. A woman, who had been bled by my advice, awoke the night following in a bath of her blood, which had flowed from the orifice in her arm. The next day she was free from pain and fever. There were many recoveries in the city from similar accidents. There were likewise some recoveries from copious natural hæmorrhages in the more advanced stages of the disease, particularly when they occurred from the stomach and bowels. I left a servant maid of Mrs. Morris's, in Walnut-street, who had discharged at least four pounds of blood from her stomach, without a pulse, and with scarcely a symptom that encouraged a hope of her life; but the next day I had the pleasure of finding her out of danger.