DELAYED REACTION 



23 



from a 2 20 volt lighting circuit and was passed through a lamp 

 rheostat before reaching the discrimination box. The release 

 box R was raised by means of a cord passed over a pulley in 

 the ceiling and back to the experimenter at E. The first release 

 box had glass over the top and sides. The right and left faces 

 of the box were i2"xi5V'. The front was yV^-^sV- With 

 this release box the distances to the entrances of the three light 

 boxes (L) were unequal. Those at the sides were each igf", while 

 the distance straight in front was 20^". These various inequal- 



FiGURE 1. Ground plan of Box A 



ities were due to two causes: (i) The box had been planned 

 originally for a different type of test and was only later arranged 

 for the present experiment. (2) The release box, being covered 

 with glass would have been too heavy to handle had it been 

 made larger. During the course of the experiments, another 

 release was made. This one was covered with wire of ^" mesh. 

 Its sides were 14^x15^'; and its front was gY'xish"- The 

 distances to the light boxes were now equal and of the dimen- 

 sions indicated in Fig. i. 



Sliding doors were placed at the points marked D in the 

 figure. They were controlled by strings which ran from them, 



