166 M. F. WASHBURN AND EDW1NA ABBOTT 



due to the readiness with which they were distracted : their 

 tendency « m being put down on the laboratory floor was to 

 wander about aimlessly. They were set down about one foot 

 away from the experiment box, which, to prevent place associa- 

 tions, and guidance by the smell of food left on the floor, was 

 moved between experiments. From February 15 to March 11, 

 tests were made on the three rabbits in rotation. 



Series 20. Red and Hering grey number 7. Red opens. 

 From February 15 to February 22, three tests a day on each 

 rabbit were made. Abednego had a total of 45 per cent, of correct 

 choices in the 3$ experiments performed by him. From February 

 28 to March 1 1 four tests a day were made on each rabbit. Abed- 

 nego made a total 0/52 per cent, correct choices in the 44 experi- 

 ments performed by him. On the last two days of this part of 

 the series he made a total of 87 per cent. From March 11 to 

 March 20 the four daily tests on each rabbit were made in im- 

 mediate succession, that is, the four tests with Abednego were 

 finished before those with Shadrach were begun, and so on. 

 Abednego made a total of 86 per cent of correct choices in the 40 

 tests of this part of the series, and may be considered to have 

 acquired the discrimination. 



Series 2 1 . Red and Hering grey number 1 5 . Red opens. 



Four tests a day, made in immediate succession, comprised 

 this series. The total number of experiments was 96. Abednego 

 made a total of 77 per cent, of correct choices. 



Three times, on two successive days each time, a right-hand 

 tendency appeared, and on one day every choice was of the 

 left-hand door. The series lasted from April 11 to April 16. 



From April 17 to April 23 Abednego was given ten tests daily. 

 In these 60 experiments he made a total of Q5 per cent, of correct 

 choices. 



Series 22. Red and Hering grey number 15, with interpolated 

 red and Stoelting black and red and velvet black tests. 



The plan was as follows. Eight tests were given on an experi- 

 ment day with red and grey number 15, the red opening. Then 

 two tests were made with red and velvet black. Next, two 

 more red and grey tests were given, and finally two with red and 

 Stoelting black. In the red and black tests we tried the experi- 

 ment of leaving both doors unbolted, so that no punishment 

 was involved for either choice. This was done on the theorv 



