The specific type of cerebrospinal meningitis which is now generally conceded to be due to the meningococcus of Weichselbaum is endemic in many of the cities of this country and in certain eastern cities has assumed epidemic form. The statistics of Greater New York show that, while last year the average number of deaths from the disease in the springtime was about six per week during the present spring the deaths have averaged over sixty per week. The death rate of reported cases seems to be near to 50 per cent., which is about what is usual in ordinary epidemics.
The most interesting feature of the present epidemic is the inevitably suggested relationship between epidemic cerebrospinal meningitis and croupous pneumonia. Foreign clinicians are practically a unit in declaring that the disease is likely to be more frequent at periods when pneumonia rages with special virulence and that, on the other