That the meningococcus should be classed in this group is certain. The author observed at Camp Sevier cases of epidemic meningitis occurring in various influenza wards scattered throughout the hospital, with no demonstrable relationship. Usually there was but one case in a ward and almost invariably meningitis occurred when convalescence was beginning. No epidemic occurred in any ward. Others have reported actual epidemics of meningitis following influenza. Moss found that a large proportion of his influenza cases had the meningococcus in the circulating blood, as demonstrated by culture. Fletcher cultivated meningococci from the lungs in all of eleven autopsies, and in all eleven cases the influenza bacillus was also present. In considering the effect of influenza on the death rate in general, and in considering the relationship of influenza to other diseases in general, it is important to distinguish those diseases which are apparently unrelated and those diseases which occur as direct complications or sequelae. Bronchopneumonia, bronchitis, empyema, otitis media, frequently tonsillitis and sometimes erysipelas, occur as sequelae. Meningitis should frequently be included in this group. Not only is there an increase in certain other diseases following influenza outbreaks, genetically related, as we have seen, but also some observers, particularly Crookshank, believe that previous to epidemic influenza prevalences there occurs an increase in the incidence of other entirely unrelated infectious diseases, such as poliomyelitis. This theory of simultaneous increase in invasiveness of many apparently unrelated germs is comparatively new and will probably receive deep consideration in the future. For the present the information on the subject is so limited that attempted conclusions would have no value. ORIGIN OF THE 1918 PANDEMIC. In discussing the spread of the 1918 pandemic over the earth, the author has traced it from an apparent origin in the United States. Localized early epidemics are reported simultaneously in the United States, France, and China. From the literature at his disposal he has been unable to find convincing proof of an earlier origin in Asia, but he did emphasize at the time the necessity of a much more thorough study of influenza in all countries to be made by more competent statisticians. Nevertheless it is highly interesting to formulate an hypothesis which appears to meet all demands, on the assumption that the disease originated in America. In order to hold a theory with this basis we must assume that the third of our previously mentioned hypotheses of the origin of the disease is the more nearly correct.