Breeding 253 



corollaries and multiply their factors as if they 

 were dealing with inanimate paints or building 

 material. The law seems to deny most of the old 

 notions about inbreeding, or to call for new ex- 

 planations. Whatever the inquiry may settle, 

 the lecturer on the "science of breeding" must 

 pause until the limits of Mendel's law are deter- 

 mined by verified observation. 



