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Addendum to the Essay on the Relation of Bilious and Yellow Fe

ver. By RICHARD D. ARNOLD, M.D., Professor of the Theory and Practice of Medicine in the Savannah Medical College.

Since the reading of my essay, several circumstances have occurred to me which I consider as bearing directly and practically on the subject treated therein.

The beginning of each summer, since our epidemic of 1854, has been a time of anxiety for many citizens, and the physician was often catechised as to his opinion, whether or not, Yellow fever was likely to appear. Being no prophet, I could not answer such queries; but, I always said, that if we had such an awfully hot summer as that of 1854, I should look out for an epidemic. The difference of mean temperature does not give any correct idea of the relative heat of two summers. According to the registry published in our newspapers in 1855, the mean temperature of July, 1854, was but one degree above that of July, 1855. When I state that the register was kept by my scientific friend, Dr. J. F. Posey, its correctness will not be doubted. Now, the contrast as to feeling was immense. July, 1855, was a remarkably pleasant month: July, 1864, will live in the memories of those who sweltered under it in this city, as by far the hottest and most oppres. sive month ever experienced by the "oldest inhabitant."

1

N, S.-VOL. XIII. NO, I.

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