CONTENTS 



PAGE 



Prefatory Note (By James R. Angell) . . . v 



Introduction (By C. Stumpf) .... i 



CHAPTER 



I. The Problem of Animal Consciousness and " Clever 



Hans "...... 15 



II. Experiments and Observations ... 30 



III. The Author's Introspections . . . .88 



IV. Laboratory Tests ..... 102 



V. Explanation of the Observations . . . 141 



VI. Genesis of the Reaction of the Horse . . 212 

 Conclusion ....... 240 



Supplements : 



I. Mr. von Osten's Method of Instruction (By C. Stumpf) 245 



II. The Report of September 12th, 1904) . . . 253 



III. An Abstract from the Records of the September 



Commission . . . . -255 



VI. The Report of December 9th, 1904 . . 261 



Table of References ... = .• 267 



