TABLE OF CONTENTS 



PART II 



XVI. The Influence of Light on the Development of 

 Organs in Animals 



XVII. Has the Central Nervous System Any Influence 

 upon the Metamorphosis of Larvae? 



XVIII. On the Theory of Galvanotropism 



XIX. The Physiological Effects of Ions. I 



XX. On the Physiological Effects of Electrical Waves 



XXI. The Physiological Problems of Today 



XXII. The Physiological Effects of Ions. II - 



XXIII. Why Is Regeneration of Protoplasmic Fragments 



without a Nucleus Difficult or Impossible ? 



XXIV. On the Similarity between the Absorption of Water 



by Muscles and by Soaps - 



XXV. On Ions Which Are Capable of Calling Forth 

 Rhythmical Contractions in Skeletal Muscle 



XXVI. On the Nature of the Process of Fertilization and 

 the Artificial Production of Normal Larvae 

 (Plutei) from the Unfertilized Eggs of the Sea- 

 Urchin 



XXVII. On lon-Proteid Compounds and Their Role in the 

 Mechanics of Life-Phenomena. The Poison- 

 ous Character of a Pure NaCl Solution 



XXVIII. On the Different Effects of Ions upon Myogenic 

 and Neurogenic Rhythmical Contractions and 

 upon Embryonic and Muscular Tissue 



XXIX. On the Artificial Production of Normal Larvae from 

 the Unfertilized Eggs of the Sea -Urchin 

 (Arbacia) 



XXX. On Artificial Parthenogenesis in Sea-Urchins 

 XXXI. On the Transformation and Regeneration of Organs 



XXXII. Further Experiments on Artificial Parthenogenesis 

 and the Nature of the Process of Fertilization - 



425 



436 

 440 

 450 



482 

 497 

 501 



505 

 510 

 518 



539 

 544 

 559 



576 

 624 

 627 



638 



