RAYMOND PEARL. 



is a factor which cannot safely be neglected in work of this 

 character. 



4. The observers who have had most experience in the appre- 

 ciation and measurement of variation have the smallest personal 

 equations on the class of material and the problem here treated. 



5. There is no evidence that the progeny of somatically inter- 

 mediate kernels is different, in any respect whatsoever, from the 

 progeny of distinctly non-intermediate kernels of the same 

 gametic constitution. 



