THE WHITE RAT AND THE MAZE PROBLEM 157 



study the effects of an olfactory control in the maze, one of the 

 most interesting features of the results was the proof of a transfer 

 of training. So far as the writer knows there has not been 

 shown before in the animal world, at least in such a graphic 

 way, this change of sensory control from one form to another 

 within a single learning process. 



