TABLE OF CONTENTS 



PAGE 



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



11. The Significance of Tropisms for Psychology - - 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 Natm*e of the Process of Fertilization - - 113 



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

 thenogenesis) - - - - - - - -127 



VIII. The Prevention of the Death of the Egg thi'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 



