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BACILLUS COLI Mignla, 1900. \^Bacteriuni coli commune Escherich.] 
A. DistributioD. 
B. Isolate from sewage. 
C. Characteristics: 
1. Motility. 
2. Gram’s method. 
3. Xonliquef action of gelatin. 
4. Indol. 
5. Gas production. 
6. Colonies, etc. 
7. Production of acid. 
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: 
1. Isolation from drinking water. 
2. Counting number of colon organisms in a cubic centimeter of water. 
J. Viability. 
