,348 MILK 



(luced a coagulum that was granular and broken up by gas- 

 bubbles. When sterile milk was inoculated with a mixture of B. 

 aerogenes and Streptococcus lacticus, less gas was produced, and 

 the gas evolution ceased after a short period. Sterile milk inocu- 

 lated with Str. lacticus alone was coagulated promptl}^ and in 



F]'g. 1G(J, n. — Streptococcus pyogenes Fig. 166, h. — Streptococcus pyogenes 

 from serum brotli. from litmus milk. 



», 



( 



>-... 



*• • \ 



^ A • 



Tig. lOt), c. — Streptococcus lacticus Fig. 166, d. — Streptococcus lacticus 

 from serum broth. (Strain 1.) from serum broth. (Strain II.) 



this case the coagulum was smooth and without evidence of gas 

 evolution. Hiippe's organism is most frequent in surface por- 

 tions of milk, while Leichmann's is more common in deep por- 

 tions, owing to the inclination of the strejitococcus to anaerobic 

 conditions. Both types are practically always present in market 



