INTEGRATION OF MOVEMENTS IN LEARNING IN THE RAT 447 



fixation of a new movement takes place. The movements re- 

 quired to solve the latch-box problem are exaggerated movements, 

 identical with progression, and the moving of light objects 

 about with the muzzle. Physiologically, these movements are 

 mechanically efficient, and their efficiency is increased by train- 

 ing, as any physiological process is by activity when interacting 

 with other body parts. 



(To be continued^) 



