The assignment of Arthur I. Kendall by the Rockefeller Institute for Medical Research to work with us on the Boston Floating Hospital during the season of 1903, has enabled us to make a few scientific and clinical observations which may be of some value to the medical profession, and hence are reported. Not less important than the expert work of Kendall was the hearty co-operation of the Boston Board of Health, the facilities of whose large laboratory were placed at his disposal.
The Bacillus dysenteriœ was discovered by a Japancse physician named Shiga in 1898. It has many characteristics in common with the bacillus of typhoid fever, thus justifying bacteriologically the position that we have taken in favor of the use of the most careful "typhoid precautions" in these cases. It differs from the typhoid bacillus in various ways—for example, its motility and its action on mannite.