xiii] MICROBES OF MALIGNANT ANTHRAX 279 



thirty-six hours the first signs of colonies can be made out 

 in the form of translucent, grey, angular, dots ; after forty- 

 eight hours to three days they are conspicuous by their size, 

 and by their margin being distinctly made up, to the naked 

 eye, of filaments, either straight or bending like loops. 

 Under the microscope the filamentous nature of the 



Fig. 100— Stab Culture in Gelatine of Bacillus Anthracis. Lique- 

 faction ON THE Surface has already commenced. 



colonies is distinctly seen : the filaments looked at 

 under a magnifying glass are more or less in bundles 

 twisted like cables, and extending sometimes like radii 

 from a centre ; at the margin this is particularly con- 

 spicuous. At the same time the colony is seen to be sunk 

 in the middle, being situated in a slight depression of the 



