XXI] PATHOGENIC ORGANISMS 583 



may protect rabbits against anthrax ; Kossel, Vaughan, 

 McClintock, produced a refractory condition to microbe 

 infection by the administration of nuclein and nucleinic 

 acid. 



A very transitory local immunity of the peritoneum of the 

 guinea-pig has been produced by Pfeiffer and Issaeff {Archiv 

 f. Hygiene, vol. xvi. part 2) by intraperitoneal injection of 

 normal serum, saline solution, nucleo-albumin and other 

 substances. 



