x SCIENCE AND PHILOSOPHY OF THE ORGANISM 



PAGE 



The Work of Wilhelm Roux . . . .58 



The Experiments on the Egg of the Sea-urchin . . 59 



On the Intimate Structure of the Protoplasm of the Germ . 65 

 On some Specificities of Organisation in Certain Germs . 70 

 General Results of the First Period of " Entwickelungs- 

 mechanik " . . . . . . .71 



Some New Results concerning Restitutions . . .74 



2. ANALYTICAL THEORY OF MORPHOGENESIS . . .76 



a. THE DISTRIBUTION OF MORPHOGENETIC POTENCIES . 76 

 Prospective Value and Prospective Potency . .76 



The Potencies of the Blastomeres . . .79 



The Potencies of Elementary Organs in General . 80 

 Explicit and Implicit Potencies : Primary and 



Secondary Potencies . . . . .83 



The Morphogenetic Function of Maturation in the 



Light of Recent Discoveries . . . .85 



The Intimate Structure of Protoplasm : Further 



Remarks . . . . . .88 



The Neutrality of the Concept of "Potency " . 89 



j3. THE "MEANS" OF MORPHOGENESIS . . .89 



/3'. The Internal Elementary Means of Morphogenesis 90 

 Some Remarks on the Importance of Surface 



Tension in Morphogenesis . . .91 



On Growth . . . . .93 



On Cell-division . . . . .94 



/3". The External Means of Morphogenesis . . 95 



The Discoveries of Herbst . . .96 



7. THE FORMATIVE CAUSES OR STIMULI . . .99 



The Definition of Cause . . . .99 



Some Instances of Formative and Directive Stimuli . 102 



5. THE MORPHOGENETIC HARMONIES . . . 107 



e. ON RESTITUTIONS. . . . . .110 



A few Remarks on Secondary Potencies and on Second- 

 ary Morphogenetic Regulations in General . .110 

 The Stimuli of Restitutions .... 113 



3. THE PROBLEM OF MORPHOGENETIC LOCALISATION : THE 



THEORY OF THE HARMONIOUS -EQUIPOTENTIAL SYSTEM 

 -FIRST PROOF OF THE AUTONOMY OF LIFE . . 118 



The General Problem . . . . .118 



The Morphogenetic " System " . . .119 



The "Harmonious-equipotential System" . . 122 



