THE BACILLUS OF SYMPTOMATIC ANTHRAX. 527 



what are the most important differential points between 

 it and baeiUus anthracis ? Inoculate several mice with 

 small portions of garden-earth and street-dust. Isolate 

 the organism that agrees most nearly with the descrip- 

 tion here given for the bacillus of malignant oedema. 

 Compare its morphological, biological, and pathogenic 

 peculiarities with those of bacillus anthracis under simi- 

 lar circumstances ; especially its action on animals and 

 its appearance in the tissues and fluids. 



Still another pathogenic organism that may be present 

 in the soil is 



THE BACILLUS OF SYMPTOMATIC ANTHEAX ; BACTlilEIE 

 DU CHAEBON SYMPTOMATIQUB (fE.) ; BACILLUS 

 DES EAUSCHBEAND (GEE.). 



It is the organism concerned in the production 

 of the disease of young cattle and sheep commonly 

 known as " black leg," " quarter evil," and " quarter 

 ill," a disease that prevails in certain localities dur- 

 ing the warm months, and which is characterized by 

 a peculiar emphysematous swelling of the muscular 

 and subcutaneous cellular tissues over the quarters. 

 The muscles and cellular tissues at the points af- 

 fected are seen on section to be saturated with bloody 

 serum, and the muscles particularly are of a dark, 

 almost black color. In these areas, in the bloody trans- 

 udates of the serous cavities, in the bile, and, after 

 death, in the internal organs, the organism to be de- 

 scribed can always be detected. It is manifest from 

 this that the soil of localities over which infected herds 

 are grazing may readily become contaminated through 



