XI.] 



BACILLUS: PATHOGENIC FORMS. 



135 



from the spleen, liver, and lung of such animals always result 

 in producing a copious crop of the characteristic bacilli, as 



fS 



FIG. 67. FROM A SECTION THROUGH A NECROTIC PATCH OF THE LIVER OF A 

 MOUSE DEAD OF SWINE PLAGUE. 



1. Tracts of liver cells shrunk. 



2. Capillary blood-vessels filled with very small micrococci, 



amongst which are seen the bacilli. 



3. Bacilli only. 



Magnifying power 700. (Stained with Spiller's purple and magenta.) 



do those made with the lung and bronchial glands of pigs 

 dead of swine plague ; but from the blood of the pig the 

 cultivations do not as a rule succeed, nor as a rule from the 



/I 



FIG. 68. BACILLI OF SWINE PLAGUE, 



FROM AN ARTIFICIAL CULTURE, 



AFTER FORTY-EIGHT HOURS' IN- 

 CUBATION. 



Magnifying power 700. (Dried and 

 stained with Spiller's purple.) 



FIG. 69. BACILLI OF SWINE PLAGUE. 

 FROM AN ARTIFICIAL CULTURE, 

 DURING SIXTH DAY OF IN- 

 CUBATION. 



i and 2. Bacilli. 



3. Bacilli in which spores have been 



formed. Magnifying power 700. 



(Fresh specimen.) 



blood of mice ; occasionally, however, those from the blood 

 of rabbits dead of the disease do succeed. 



