594 SUMMAllY OF CUIUIENT KESEAKCIlliS RELA.TING TO 



They have demonstrated from experiments on monkeys that both 

 filtered and unfiltered cerebro-spinal fluid containing the meningococcus 

 produce the same pathological effects (continued fever or death). In 

 no case did injection of the inocula produce the cardinal symptoms of 

 the disease as it occurs in man, namely, demonstrable involvement of the 

 cerebro-spinal system. The filter-passing agent can, however, be re- 

 covered from the tissues of the infected monkey, and can be transmitted 

 to other experimental animals. The pathogenicity of cultures of the 

 meningococcus appears to be due to the concomitant presence of the 

 filter-passing virus described. 



