152 MICRO-ORGANISMS AND DISEASE. [CHAP. 



eight hours incubation, the fluid is uniformly turbid, owing 

 to the rapid multiplication of the bacilli. These are shorter 

 or longer typical anthrax-bacilli. But as incubation proceeds 

 all the bacilli grow into filaments, and these being heavier 

 sink to the bottom of the fluid and form the characteristic 

 whitish fluffy convolutions. But on inoculating dilute broth, 

 care being taken that the inoculating material, whether 



FIG. 83. FROM A PREPARATION OF THE BLOOD OF SPLEEN OF A GUINEA-PIG 

 DEAD OF ANTHRAX. 



1. White blcod-corpuscle. 



2. Red blood-discs, shrunken. 



3. Chains of bacillus anthracis. 



4. Degenerating bacilli, the sheath only being preserved. 

 Magnifying power 700. (The preparation has been stained with gentian-violet.) 



consisting of blood-bacilli, bacilli of a culture, or spores of 

 culture-bacilli, is deposited at once on the bottom of the 

 fluid, and this is not shaken up, it will be noticed on incu- 

 bation that the fluid remains limpid. All the growth, in 

 the shape of the fluffy whitish masses, takes place at the 

 bottom. 



