EFFECTS OF STRYCHNINE UPON RATE OF LEARNING 



159 



TABLE 6 



A comparison of the number of trials required for learning by rats after injections 



of caffeine and of water 



Differences 



TABLE 7 



Distance in excess of true pathway traversed by rats after injections of caffeine and 



of water 



TABLE 8 



The proportion of rats receiving caffeine which required a greater number of 

 trials for learning the maze than did their individual controls 



