EXPERIMENTS ON THE RABBIT 179 



black as the door to be avoided. But on the next day the records 

 read as follows. 



" i. Red left. Towards red, pause, pushes red. 



" 2. Red right. Red. 



"3. Red left. To black, pushes, shakes ears, to red. 



"4. Red right. To middle, to red. 



"5. Red left. Starts towards red, turns and faces black, 

 stretches so that whiskers just touch black, shakes ears, pushes 

 red. 



" 6. Red right. Touches black, to red. 



" 7. Red left. Went to left side, then to red. 



" 8. Red right. Went towards red, pauses a long time, 

 finally pushes." 



And in the ten experiments performed the next day she chose 

 the right hand door every time, although with much hesitation 

 and ear-shaking. There was no evidence from this time on in 

 the series that red and black were distinguished. 



As further proof that something more than an acquired avoid- 

 ance of a particular visual impression as such is involved in our 

 experiments, we may take the behavior of Dark Nose in Series 17. 

 Here she was given daily 9 tests for seven days with red and 

 grey number 7, in which she never failed to choose the red. In 

 each day's series there were interpolated two tests with blue 

 and grey number 15, and in these 14 experiments the rabbit 

 touched the grey first 11 times. This does not look as though 

 she had been avoiding the grey as such in the grey-red tests. 

 It is true that the same grey was not used in the red-grey and 

 blue grey experiments, but if we are to explain all our red -gray 

 series on the supposition that they involved avoidance of grey 

 as such, we must suppose that experience with one grey was 

 transferred to the other greys, for Series 2 and 8, with red and 

 grey number 7, gave high percentages of correct choices which 

 could be accounted for only by supposing them due to the ex- 

 perience gained in Series 1 and 7 : either the rabbits had there 

 learned to choose the darker impression, or to choose the red 

 as such, or to avoid grey, whether number 7 or number 15, as 

 such. 



Again, Abednego, after long training to choose red rather than 

 grey, was offered the choice between blue and black, and invari- 

 ably chose black (Series 23). If his preceding training had taught 



