TYPES OF BACTERIA FOUND IN MILK 



'- 





A B C D 



FIG. l8 EFFECT OF DIFFERENT BACTERIA ON MILK 

 A. Bad. aerogenes. B. Bact. lactis acidi. C. & D. Liquefying bacteria 



grows with great rapidity, and at this temperature it seems to 

 be more vigorous than any other bacterium ordinarily found 

 in milk. For this reason, as we shall presently see, milk kept 

 at 70 becomes, in a short time, almost completely filled with 

 this species of bacterium at the expense of all the others that 

 might have been there originally. This type of organism is the 

 dairyman's friend. 



