In the histories I have given of the yellow fevers of 1793 and 1794, I have scattered here and there a few observations upon their degrees of danger, and the signs of their favourable or unfavourable issue. I shall close the present history, by collecting those observations into one view, and adding to them such other signs as have occurred to me in observing this epidemic.
Signs of moderate danger, and a favourable issue of the yellow fever.
1. A chilly fit accompanying the attack of the fever. The longer this chill continues, the more favourable the disease.
2. The recurrence of chills every day, or twice a day, or every other day, with the return of the exacerbations of the fever. A coldness of the whole body, at the above periods, without chills, a coldness with a profuse sweat, cold feet and hands, with febrile heat in other parts of the body, and a profuse sweat without chills or coldness, are all less favourable symptoms than a regular chilly fit, but they indicate less danger than their total absence during the course of the fever.
3. A puking of _green_ or _yellow_ bile on the first day of the disease is favourable. A discharge of black bile, if it occur on the _first_ day of the fever, is not unfavourable.
4. A discharge of green and yellow stools. It is more favourable if the stools are of a dark or black colour, and of a f[oe]tid and acrid nature, on the first or second day of the fever.
5. A softness and moisture on the skin in the beginning of the fever.
6. A sense of pain in the head, or a sudden translation of pain from internal to external parts of the body, particularly to the back. An increase of pain after bleeding.
9. An early disposition to spit freely, whether excited by nature or the use of mercury.
10. Blood becoming sizy, after having exhibited the usual marks of great morbid action in the blood-vessels.
11. Great and exquisite sensibility in the sense of feeling coming on near the close of the fever.
13. The appearance of an inflammatory spot on a finger or toe, Dr. H. M'Clen says, is favourable. It appears, the doctor says, as if the cause of the fever had escaped by explosion.
Signs of great danger, and of an unfavourable issue of the yellow fever are,