EXPERIMENT STATION BULLETINS. 



479 



The fermenting power of the same organism at 20° was found to he 

 24 X 10^'*. Tlie increase of 15°C. has increased the fermenting capacity 

 to nearly four times its normal amount. 



In another experiment, tripilicate milk cultures were kept at 30°C. 

 and tested every six hours. The result is shown in Table XXIV. The 

 variation in the fermenting capacity for the first six hours is readily ac- 

 counted for by the inaccuracy of the titration. The total amount of 

 acid formed during the first six hours is practically within the limits 

 of error which makes the data unreliable. 



TABLE XXIV. 



These numbers give the following fermenting capacity : 



No records are on hand to compare these data with those obtained 

 at room temperature. The rate of reproduction is decidedly decreased, 

 only 25 to 29 minutes being required for one cell division during the 

 first six hours. 



The data on the influence of temperature are too incomplete to allow 

 any detailed conclusions. The increase of the fermenting capacity with 

 the temperature is evident. It is the object of this paper to point out 



