PART III 



OEGANIC MOVEMENTS 



INTRODUCTORY EEMARKS 



OUR study of morphogenesis has led us to a very important 

 result. We have become convinced of the autonomy of life, 

 as far as the origin of the individual living form is concerned. 

 The short surveys that we devoted to the physiology of 

 metabolism and to biological problems of the systematic and 

 historical kind have not proved so successful. Physiology 

 afforded us but few indicia of a future vitalism, and in the 

 large fields of systematics and history we found that there 

 was very little to be learnt at all. 



We now begin the second half of our lectures, and shall 

 first conclude the factual or analytical or purely scientific 

 section : the analysis of the physiology of organic movement 

 has still to be attempted. The study of animal movement 

 will be as instructive as the study of morphogenesis has 

 been ; it will bring us into close contact with philosophical 

 questions again. And when we have finished it we shall 

 have completed our purely scientific work, and may then 

 enter the sacred halls of pure philosophy. 



The physiology of organic movement may raise the 



following questions, and, indeed, every text-book of physiology 



3 



