Chronic progressive chorea associated with mental enfeeblement occurring during adult life, first fully described by Huntington in 1872, seems far more prevalent in the Middle West than in the East. There were but two cases of this type among the 2,436 admissions to Manhattan State Hospital1 during 1909 and 1910. If this can be taken as an indication of the prevalency of Huntington's chorea in the East, it will be seen that it is quite low when compared to the number admitted at Kankakee, Illinois, and the Wisconsin State Hospital during the same period. The combined admission rate of these two last-named hospitals approximately equals that of the Manhattan State Hospital. At Kankakee there were two patients admitted2 and five at the Wisconsin State Hospital. It will also be recalled that Hamilton's3 twenty-seven cases were all taken from the Middle West.
The following two cases seem especially