274 BACTERIA. 



aflFected with anthrax, for two or three hours in aqueous 

 humour, the threads then become elongated, the marks of 

 division are not nearly so distinct, and the threads remain 

 homogeneous. It is possible, therefore, that the appearances 

 met with in the fluid in the chest are due to the fact that the 

 organisms have been allowed to remain at rest in the 

 exudation, and that a process of cultivation has been going 



Photo-micrograph — Modified Anthrax bacillus — longer threads leptothrix form, x looo. 



on. In preparations made from the blood it is found that the 

 corpuscles are somewhat' irregular in shape, that they are 

 running together in little irregular masses, and that the 

 bacilli are much more numerous than the blood corpuscles. 

 As regards the size of the bacilli it may be observed that the 

 rods vary not only in length (in the same animals), but that 

 they are of different breadths according as they develop in 



