. Effect of External Conditions 155 
less seem quite frivolous to attempt any serious refutation of the 
“germinal selection”’ hypothesis. In justification, [ will but call 
attention to the fact that this theory is not only treated respectfully 
butis ably defended in the most recent general treatise on heredity.™ 
51 T refer to Thompson’s admirable work, Heredity (G. P. Putnam’s Sons, 1908), which should be 
in the hands of every student of this province. 
