TACTUAL SENSATION IN THE RAT 



129 



and gradually decreases as the maze is learned. The first figures, 

 while high, do not render full justice to the situation. Figure 3 

 will serve to illustrate the point. When the rat came down 

 alley g toward a, one contact at any point in the vicinity of e 

 MISTAKES 



TRIALS ^' 



Figure 4 — Constructed from table I. Curve I. — Graphic representation^of number 



Jfof corners touched in learning maze I by five normal rats. Ordinates represent 



number of corners touched; abscissas represent number of trials. Curve II. — 



Graphic representation of errors under above conditions. Ordinates indicate 



the number of errors. 



might serve as a sufficient stimulus to make the turn success- 

 fully. Thereby the rat went around two corners with only 

 one contact. Had the corners been farther apart, two contacts 

 would probably have been made, since this was usually the case. 



