550 BACTERIOLOGY. 
Under favorable conditions in cultures spores are 
developed in the bacilli. These spores are elliptical 
in shape and about one and a half times longer than 
broad. They first appear as small, refractive gran- 
ules distributed at regular intervals, one in each rod. 
As the spore develops the mother-cell becomes less and 
less distinct, until it disappears altogether, the com- 
plete oval spore being set free by its dissolution. (Fig. 
72, Fig. 13, p. 47, and Fig. 17, p. 207). Irregular 
sporulation sometimes takes place, and occasionally 
there is no spore-formation, as in varieties of non-spore 
bearing anthrax. 
Spores heavily stained (in specimen red). Bodies of disintegrating bacilli 
faintly stained (in specimen blue). > 1000 diameters. 
The anthrax bacillus stains readily with all the aniline 
colors, and also by Gram’s method, when not left too 
long in the decolorizing iodine solution. In sections 
good results may be obtained by the employment of 
Gram’s solution in combination with carmine, but when 
