Fig. 12. 



From a stained section through the medullary part of the inflamed 

 inguinal lymph gland of a rat dead after cutaneous inoculation at the root 

 of tail, same rat as Fig. 6. A mass of plague bacilli (dark) in the lymph 

 space — the lighter part — filled with effused blood. x 300. 



Fig. 13. 



Same preparation as in Fig. 12. The lighter parts are the medullary 

 lymph sinuses filled with effused blood ; the darker parts are the masses of 

 adenoid tissue, of which only the densely aggregated nuclei are seen. 

 X300. 



