xii CONTENTS 



PAGE 



Further Analysis of Theories of Qualitative Nuclear Divisions and of the 



Equivalency of Blastomeres 252 



Driesch's Analytical Theory, Criticism, and Later Theories of Driesch . 253 



Conclusions 256 



CHAPTER XIII 

 THEORIES OF REGENERATION 



Pre-formation Theory 260 



Comparison with Growth of Crystal 263 



Completing Theory ........... 264 



Theory of Formative Stuffs 265 



Conclusions ............. 269 



Theory of Tensions controlling Growth 271 



CHAPTER XIV 

 GENERAL CONSIDERATIONS AND CONCLUSIONS 



Organization 277 



Machine Theory of Development and of Regeneration .... 283 



Teleology 283 



"Action at a Distance" 284 



Definition of Terms : Cause, Stimulus, Factor, Force, Formative Force, 



Organization 287 



Regeneration as a Phenomenon of Adaptation 288 



LITERATURE 293 



INDEX 311 



