Other Intestinal Bacteria. 



157 



when the red colonies were counted. At the time of 

 plating, i c.c. fro'm each sample was also inoculated into 

 dextrose broth in fermentation tubes, which were likewise 

 incubated at 37. After various periods, as indicated 

 by the table below, the tubes were shaken thoroughly 

 and i c.c. of the contents withdrawn. This was diluted 

 (generally 1-1,000,000) with sterile water, plated on litmus 



TABLE II. 



RELATIVE GROWTH OF B. COLI AND SEWAGE STREPTOCOCCI 

 FROM POLLUTED WATERS IN DEXTROSE BROTH. 



(PRESCOTT AND BAKER, 1904.) 



lactose agar in the usual way, and incubated for twenty- 

 four hours. The colonies of B. coli and streptococci 

 were distinguished microscopically, and by difference in 

 color and general characters. 



