Fig. 77. 



Part of Fig. 76, more highly magnified. 



A, Blood corpuscles within the blood-vessel. 



B, B. pestis in surrounding lymph spaces. x 1000. 



Fig. 78. 



Transverse section through mesenteric gland of a rat dead of acute plague 

 after feeding. 



A, An afferent lymph vessel filled with B. pestis. 



B, Cortical lymph sinuses filled with B. pestis. 



All the light areas of the figure are the parts containing extravasated 

 blood, the dark parts are masses of B. pestis. In the actual preparation, 

 which was stained with methylene blue and eosin, the contrast between the 

 masses of B. pestis (blue) and the extravasated blood (pink) was particularly 

 striking. x 20. 



