21 
i BACILLUS COLT Migula, 1900, \_Bactenwn coU commune Escherich.] 
A. Distribution. 
B. Isolate from sewage. 
C. Characteristics : 
1. Motility. 
2. Gram’s method. 
.S. Nonliqnefaction of gelatin. 
4. Indol. 
5. Gas production. 
6. Colonies, etc. 
D. Pathogenesis. 
E. Varieties. 
F. Preparation of its toxin. 
G. Pathogenicity. 
H. Study of blood and organs of infected animals. 
I. Significance in drinking water. 
J. Viability. 
