HEEEDITY 



such cases, then, it would seem that along with 

 the cases due to environmental influence oc- 

 curred others due to germinal variation. Al- 

 though selection of the former would not in- 

 fluence the race permanently, there is every 

 reason to think that the latter would so influ- 

 ence it, and did in the experiment. 



Accordingly the results of Johannsen and 

 Jennings on the one hand, and of Woltereck 

 on the other, are not necessarily in opposition 

 to each other. Woltereck 's conclusions agree 

 with those of Johannsen and Jennings so far 

 as concerns the great bulk of the variations, 

 those caused by external influences. All agree 

 that they are not inherited. Woltereck, how- 

 ever, observes also, what the others have failed 

 to observe, that along with the non-inherited 

 variations occur other similar but less numer- 

 ous ones which are inherited. 



My own observations are entirely in har- 

 mony with those of Woltereck. Like him, I 

 find that selection may modify characters. In 

 several cases I have observed characters at 

 first feebly manifested gradually improve under 

 selection until they became established racial 



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