The observation of many patients suffering with scarlet fever gave me the impression that their fate depended, in part on the anatomic configuration of their throats, and led me to verify this conclusion by statistical study. To this end special charts were printed, and observations were collected, covering certain definite points in tonsil structure. I am indebted to assistant resident physicians and interns in the scarlet fever pavilion of the Willard Parker Hospital, especially to Doctors Cootner, Tolle and Crawford. who made the observations on admission. A large number of the observations were verified or corrected by me on my later visit. It is thought that in this way the observations have greater value as averaging any personal error.
In table 1 are tabulated 154 cases which were observed during my services in 1919 and 1920. This does not represent all the cases seen during that time, as cases in