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H. S. JENNINGS 



present to those that had been introduced was taken at each; 

 this gives the ratio of multiphcation for the two days. These 

 ratios are given in table 19. 



From the results given in table 19 the following are clear: 

 (1) the non-conjugants, D, cultivated on slides till June 7, are 

 still much depressed, and much less vigorous than either the 

 non-conjugants {H) which came from the watch glass with the 

 conjugants, or than the conjugants themselves {K); (2) the 

 non-conjugants {H) which have the same cultural history as the 

 conjugants (iv) are still somewhat superior in vigor to the con- 

 jugants. In every one of the four periods their ratio of multi- 

 plication is greater. 



The results of this experiment are then throughout consonant 

 with those of Experiments 11 a, 11 6 and lie. From all, the 



TABLE 19 



Experiment 11 g. Paramecium aurelia. Ratio of multi-plication for a number of 

 periods of time, in watch glass cultures of the three sets D, H and K, described in 

 the text. 



