CAUSE FOR VARIATION 



17 



Fig. 4. Laroe abscess in partially iminiaiizfd rabbit caused by siuine- 

 plague bacteria. This rabbit lived jyi days after its inoculalio7i with 

 virulent swine plague bacteria. At death its 'n<eight zuas igSo grams^ 

 the tu mor itself 'u'cigh ing goo grams. 1 he abscess Jormed dorsad of the 

 peritoneum. (a) Cecum, {b) intestines, (c) abscess. The control rab- 

 bit of same iveight and age died of septicemia in 16 hours. 



