FEEDING PARAMECIUM KNOWN BACTERIA 



165 



It will be seen from a study of this table that any variation in 

 the division rate of the animals in the new medium from that of 

 those in the standard hay infusion was so slight as to be of no 

 importance. The fact that M failed during the last period of 

 this experiment when used in the new medium is not necessarily 



TABLE 6a 

 Shoiri7ig the results of feeding Paramecium with the bacteria C, A' C, A' B' C, 

 and M, in the 0.1 per cent standard timothy hay infusion and in 0.1 per cent 

 uncured swamp-hay infusion, during the time from November 6, 1920, to Novem- 

 ber 26, 1920. Data for the swamp-hay medium in the second row in each case 



TABLE 6b 



Showing results of feeding Paramecium with the same bacteria in the same media as 



in 6a, during the time from December 5, 1920, to December 28, 1920 



THE JOURNAL OF EXPERI.MENTAL ZOOLOGY, VOL. 36, NO. 2 



