TABLE OF CONTENTS 



PAGE 



I. The Mechanistic Conception of Life - _ - - 3 



IL The Significance of Tropisms for Psychologj'- - - 35 



IIL Some Fundamental Facts and Conceptions concerning the 

 Comparative Physiology of the Central Nervous Sys- 

 tem ----^-----65 



IV. Pattern Adaptation of Fishes and the Mechanism of 



Vision _-------- 79 



V. On Some Facts and Principles of Physiological Morphol- 

 ogy ---------- 85 



VI. On the Nature of the Process of Fertihzation - - 113 



VII. On the Nature of Formative Stimulation (Artificial Par- 

 thenogenesis) - - - - - - - -127 



VIII. The Prevention of the Death of the Egg tlii-ough the Act 



of Fertilization __--__- 155 



IX. The Role of Salts in the Preservation of Life - - - 169 



X. Experimental Study of the Influence of Environment on 



Animals --------- 195 



Index ----------- 229 



