Growth of Bacilli 
QO 
In the figures the formation of various angles and the subsequent out¬ 
growths can be clearly followed up to 135 minutes (Fig. 10). Later 
development becomes irregular and often results in the production of 
knot-like masses in the main chain, as may be seen in Figs. 11 and 12, 
representing the upper portion of the colony after 210 and 310 minutes 
growth respectively. Fig. 11 represents a later stage of the upper 
portion of the colony above the point A, and Fig. 12 a later stage in 
the development of Fig. 11 above the point B. 
Diagram 3. Illustrating the development of a “ folding ” organism in the depth of agar. 
Plate V, Fig. 9 illustrates the upper portion of this colony at a 
still later stage (6 hours). 
Three organisms, morphologically resembling B. anthracis, belonging 
to this group have been investigated and all of them produce, in spite 
of the difference in the mode of development, colonies resembling those 
