28 4 



MILK AND ITS HYGIENIC RELATIONS 



It is so well known that bacteria multiply more readily in a 

 warm atmosphere than in a cold as to render it unnecessary to 

 lay stress upon this point. A certain amount of work has been 

 carried out in regard to the optimum temperature of the multipli- 

 cation of different strains of bacteria, and there is some reason to 

 believe that this temperature varies slightly for different organisms. 

 There is no doubt that until the optimum temperature is reached 

 the rate of growth becomes increasingly rapid. Some figures 

 prepared by myself in relation to the growth of B. coli at different 

 temperatures are illustrative of this fact and are given below : 1 

 Growth of B. coli at Temperatures 20-42 C. 



1 Since writing the above, figures have been published by Slator for 

 Bacillus Acidi Lactici. 



