BACTERIAL INHIBITION 



535 



milk. Applying the formula of Buchner, Longard, and Riedlin, 

 the average generation time for the period from inoculation to 

 120 minutes is 26.9 minutes in the raw milk and 26.4 minutes in 

 the heated milk, a difference of only 0.5 minute. In the raw milk 

 of these two germicidal cows there is no bactericidal action on 

 Bact. lactis-acidi, and apparently no retarding influence, such 

 as is found for Culture R and the organisms in the uninoculated 



Bact. per c.c. 

 (Logs.) 



6.25 



Chart 3. Growth op Bacteria in Milk Inoculated with Bact. lactis-acidi 



at 37°C. 



controls. The similarity in the growth curves of the raw and 

 heated milk is shown in chart 3, plotted from the logarithms of 

 the averages from table 4. 



This specificity of the germicidal action for the organism is 

 best illustrated by chart 4, in which are assembled the raw milk 

 curves from charts 1, 2, and 3. It is of interest to note that 

 throughout tables 2, 3, and 4 the uninoculated raw milk controls of 

 these two cows, numbers 155 and 212, show no germicidal action 



