SYMPTOMATIC ANTHRAX. 281 



tremely mobile, and is nearly always provided at 

 one extremity with a refractive spore. Sometimes 

 the rod is very long and has a spore at each ex- 

 tremity. It may happen that the microbe is only 

 distinguished by this spore, as the rod has nearly 

 the same refractive index as the fluid in which it 

 is found. The writer would remark, en passant ', 

 that he has observed bacilli which answer very 

 well to this description, in putrid blood, and es- 

 pecially in a specimen of blood sent to him from 

 Havana, which had become putrid en route. This 

 was obtained from a yellow-fever patient, post 

 mortem. Photo-micrographs were made of this 

 organism, and heliotype reproductions of these are 

 seen in Fig. 5, Plate II., and' Fig. 4, Plate III. 

 These bacilli are endowed with active motion, 

 have rounded extremities, and very commonly 

 contain a highly refractive spore at one end, as 

 seen in Fig. 2. 



According to the authors named, symptomatic 

 anthrax occurs especially in young cattle, of six 

 months to four years, and in lambs. It is charac- 

 terized by. loss of appetite, debility, and lameness 

 due to the development of a tumor. Wherever 

 situated, this tumor is irregular in form, and ex- 

 tends in every direction with astonishing rapidity. 

 In eight to ten hours it attains an enormous de- 

 velopment. At first homogeneous and extremely 

 painful, the tumor becomes, little by little, insen- 

 sible in the centre and crepitates on pressure. 

 All of the tissues forming this tumor are black 



