—It is well known that Prof. Koch, in his communications to the German Government, claims as the result of the investigations of his commission, both in Egypt and India, the discovery of a bacillus which is specifically essential to cholera, and readily found in every case, in the mucous membrane of the intestines and in the rice-water stools. It is also stated that the same variety of bacillus was found in some of the water used by the natives in India.
Koch states that these bacilli are peculiar as to shape, motion, and tendency to aggregation.
He does not believe them to be simply concomitants of disease, or normal intestinal inhabitants.
They are not found in the stomach or matters vomited, which were not obviously of fæculent character.
He has thus far failed to inoculate animals with these bacilli. They may be developed rapidly outside the human body when subject