Chapter 8. 

 THE GHONDRIOME (continued):- THE CHONDRIOME AND ITS 

 DEVELOPMENT IN THE PHANEROGAMS. RELATIONSHIPS BETWEEN 

 CHONDRIOSOMES AND PLASTIDS. THE FACTS 70 



Chapter 9. 

 THE RELATIONSHIP BETWEEN CHONDRIOSOMES AND 

 PLASTIDS:- INTERPRETATIONS 85 



Chapter 10. 

 DUALITY OF THE GHONDRIOME:- Theory of the author 



HiSTOCHEMICAL AND HISTOPHYSICAL CHARACTERISTICS OF 



CHONDRIOSOMES AND PLASTIDS — DEVELOPMENT OF CHONDRIO- 

 SOMES AND PLASTIDS AMONG THE PLANT GROUPS — PHYLOGEN- 

 ESIS OF CHONDRIOSOMES AND PLASTIDS 94 



Chapter 11. 

 HYPOTHESES RELATIVE TO THE ROLE OF CHONDRIO- 

 SOMES AND PLASTIDS 116 



Chapter 12. 

 THE VACUOLES:- Early data. Insufficiency of methods. 

 Theory of Hugo de Vries 125 



Chapter 13. 

 VITAL STAINING OF THE VACUOLES:- Colloidal sub- 

 stances in the vacuolar sap — Action of vital dyes on the 

 cells. Advantages of vital staining 129 



Chapter lU. 

 DEVELOPMENT OF THE VACUOLAR SYSTEM:- First 

 stages in development — Chondriosome-shaped vacuoles 



and CHONDRIOSOMES. CHARACTERISTIC DIFFERENCES — PHYSICAL 

 CHARACTERISTICS OF THE VACUOLES — CHEMICAL NATURE OF 

 THE COLLOIDAL SUBSTANCE OF VACUOLES — VACUOLAR pYL AND 



rH 146 



Chapter 15. 

 ORIGIN AND SIGNIFICANCE OF THE VACUOLES :- 



Aleurone grains : their formation — Reversibility of form 



IN THE VACUOLAR SYSTEM — THE PHENOMENON OF VACUOLAR 

 CONTRACTION — ORIGIN OF VACUOLES — THE PRESENCE IN 

 SOME CELLS OF SEVERAL DISTINCT CATEGORIES OF VACUOLES — DI- 

 GESTIVE VACUOLES 170 



