A puking of bile was more common this year than in the year 1793. It was generally of a green or yellow colour. I have remarked before, that two of my patients discharged black bile within an hour after they were affected by the fever, and many discharged that kind of matter which has been compared to coffee grounds, towards the close of the disease. The fæces were black in most cases where the symptoms of the highest grade of the fever attended. In one very malignant case the most drastic purges brought away, by fifty evacuations, nothing but natural stools. The purges were continued, and finally black fæces were discharged, which produced immediate relief[107]. In one person the fæces were of a light colour. In this patient the yellowness in the face was of an orange colour, and continued so for several weeks after his recovery. [107] In the account of the effects of morbid action and inflammation, in the Outlines of the Theory of Fever, the author neglected to mention the change of certain fluids from their natural to a dark colour. It appears in the secretions of the stomach and bowels, in the bile, in the urine, in carbuncles, and occasionally in the matter which is produced by blisters. All these changes occur in the yellow fever, and, in common with the other effects of fever that have been enumerated, are the result of peculiar actions in the vessels, derived from _one_ cause, viz. morbid excitement.