TABLE OF CONTENTS. 



PAGE. 



Introduction, i 



Description of Apparatus, S 



Experiments with Cats, 12 



" Dogs, 31 



" " Chicks, 34 



Reasoning or Inference, 39 i^-^ 



Imitation, 47 



" in Chicks, 51 



" " Cats, 54 



" " Dogs, • ... 59 



The Mental Fact in Association, 65 v-^^ 



Association by Similarity and the Formation of Concepts, . . 78 ^^^^ 



Criticism of Previous Theories, 85 



Delicacy of Association, 87 



Complexity of Associations, 91 



Number of Associations, 93 



Permanence of Associations, 95 



Inhibition of Instincts by Habit, 99 



Attention, loi 



The Social Consciousness of Animals, 103 v/^ 



Interaction, 103 



Applications to Pedagogy, Anthropology-, etc., 104 



Conclusion, 107 



