FIG. 15. BACTERIAL CONTENT OF MILK HANDLED IN ORDINARY WAY. 



Each spot represents a colony growing on gelatine plate. Compare with Fig. 16, 

 where same quantity of milk is used in making culture. Over 15,000 

 bacteria per c.c. in this milk. 



After Russell. 



FIG. 16. BACTERIAL CONTENT OF MILK DRAWN WITH CARE. 



Diminished germ content is shown by smaller number of colonies (330 bacteria 

 per c.c.). Compare this culture with that shown in Fig. 15. 



After Russell. 



