HEREDITY AND ENVIRONMENT 177 
some of these faculties, both good and bad, are so exceedingly weak as to be 
practically wanting, and capable of development only in the most persistently 
favorable environment. However favorable the environment, faculties will 
not develop which were not inherited from the family line, any more than 
would living in a white house make a white man out of a negro child. 
References. 1. “ Principles of Breeding.” 
2. “Essays on Heredity and The Germ Plasm.”’ Separate volumes by 
Weismann against the transmission of modification. 
3. ‘An Examination of Weismannism and Post-Darwinian Questions.” 
Separate volumes by Romanes, favoring transmission of modifications. 
