174 OMENTAL PLAGUE chap. 



and in the tissue of the villi. Sections through the 

 affected swollen Peyer's glands showed appearances like 

 those previously described (Fig. 75). Particularly some 

 villi showed haemorrhages with numerous B. pestis, and 

 others were crammed with B. pestis in the manner re- 

 presented in Fig. 80. 



Sections through the hardened kidney showed appear- 

 ances already described, but more pronounced, in respect 

 of numerous haemorrhages in the cortex and at the 

 boundary layer. Almost all glomeruli showed some 

 capillaries degenerated, others blocked with B. pestis ; in 

 many of the Malpighian corpuscles the cavity of the 

 capsules contained blood and B. pestis. A like appear- 

 ance was observed in many of the convoluted tubules. 



It should be mentioned here that while in the actual 

 specimens double stained with methylene-blue and eosin 

 the distribution of the B. pestis in the tissues is at once 

 strikingly apparent owing to the contrast between the 

 bacilli stained blue and the blood corpuscles red, in the 

 figures submitted this contrast is lost ; owing to the low 

 magnifying power and to dense packing of the B. pestis 

 these collections are only indicated as dark masses. 



In addition to the above experiments, I have obtained 

 a number of other positive results from feeding rats with 

 wheat and rice mixed with finely minced plague organs 

 and dried over sulphuric acid for two or even three days. 

 It is, however, unnecessary to describe all of them in 

 detail ; they fully confirm the above observations. 



Experiment 8. — Parts of the organs (spleen and liver) 

 of plague rat No. 12 were finely cut up and mixed in 

 separate dishes, with wheat and rice, and placed on June 

 11 over sulphuric acid. After forty-eight hours (June 13) 



