318 



ROBERT T. HANCE 



this method at the time of \\Titing no tendency to produce 

 more high-vacuoled animals is evident. 



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Chart 11 This figure illustrates the effect of selection and is described on 

 page 316. 



Analysis of Chart 11 



Experiment A was started with a two-vacuoled paramoecium 

 and selection was always made of animals with the least number 



