ON NUKADA'S LAW CONCERNING THE INCIDENCE OF WHOOPING COUGH. (SECOND REPORT).

Abstract

The author reported in the previous paper an interesting fact concerning Nukada's law. He further studied his material more in detail. He found the rate of incidence of whooping cough was the lower, the larger th number of brother's order, whence the number of the brotherhood itself had no influence on the rate of incidence.