There may be habits in which great and long protracted debility may have so far exhausted the active powers of the system, as to render bleeding altogether improper in this disease, in a West-India climate. Such habits are sometimes produced in soldiers and sailors, by the hardships of a military and naval life. Bleeding in such cases, Dr. Davidson assures me, in a letter dated from Martinique, February 29th, 1796, did no good. The cure was effected, under these circumstances, by purges, and large doses of calomel. But where this chronic debility does not occur, bleeding, when properly used, can never be injurious, even in a tropical climate, in the yellow fever. Of this there are many proofs in the writings of the most respectable English and French physicians. In spite of the fears and clamours which have been lately excited against it in Jamaica, my late friend and contemporary at the college of Edinburgh, Dr. Broadbelt, in a letter from Spanish Town, dated January 6th, 1795, and my former pupil, Dr. Weston, in a letter from St. Ann's Bay, dated June 17th, 1795, both assure me, that they have used it in this fever with great success. Dr. Weston says that he bled "_copiously_ three times in twenty-four hours, and thereby saved his patient." The superior advantages of the North-American mode of treating the yellow fever, by means of _all_ the common antiphlogistic remedies, will appear from comparing its success with that of the West-India physicians, under all the modes of practice which have been adopted in the islands. Dr. Desportes lost one half of all the patients he attended in the yellow fever in one season in St. Domingo[126]. His remedies were _moderate_ bleeding and purging, and the copious use of diluting drinks. Dr. Bisset says, "the yellow fever is often under particular circumstances very fatal, carrying off four or five in seven whom it attacks, and sometimes, but seldom, it is so favourable as to carry off only one patient in five or six[127]." The doctor does not describe the practice under which this mortality takes place. [126] Vol. i. p. 55. [127] Medical Essays and Observations, p. 29. Dr. Home, I have elsewhere remarked[128], lost "one out of four of his patients in Jamaica." His remedies were _moderate_ bleeding and purging, and afterwards bark, wine, and external applications of blankets dipped in hot vinegar. [128] Account of the Yellow Fever of 1793. Dr. Blane pronounces the yellow fever to be "one of the most fatal diseases to which the human body is subject, and in which human art is the most unavailing." His remedies were bleeding, bark, blisters, acid drinks, saline draughts, and camomile tea.