APPENDIX TO CHAPTER X 245 



Table III. deals with the Method of Acquisition. It is con- 

 fined to the cats and dogs, and to those experiments in which 

 there was some suggestion of perceptual learning. It states the 

 method used by the experimenter (in which connection see the 

 general account, pp. 186-189), and compares the behaviour of 

 the animal at the first trial with the behaviour necessary for 

 success. When there was a distinct suggestion of some other 

 influence guiding the animal, that is noted. 



Table IV. notes the definite cases of failure where the experi- 

 ment was fairly tried. Twelve trials distributed over more than 

 one day are taken as establishing a fair trial. In some cases I 

 have entered failures of special interest not fulfilling this condition. 

 Only animals appearing in the other tables are entered. 



