CONTENTS 



CHAPTER I 



GROWTH 



PAGE 



I. General . I 



2. Growth under Constant External Conditions 3 



3- ), (continued) 7 



4. Growth in Thickness and Growth-contraction 13 



5. The Rapidity of Growth 15 



6. The Measurement of Growth ig 



CHAPTER II 



THE MECHANICS OF GROWTH 



7. General 24 



8. The Growth of the Cell-wall 27 



9. (continued) 31 



10. The Growth of Starch-grains 35 



CHAPTER III 



GROWTH AND CELL-DIVISION 



11. General 38 



12. The Relation between Cellular and Nuclear Division 40 



13. Mechanical Aids in the Differentiation of the Tissues 44 



14. The Order of Cell-division 46 



CHAPTER IV 



THE ELASTICITY AND COHESION OF THE PLANT-BODY 



15. Mechanical Strength and Rigidity 



16. Elasticity ^and Cohesion of the Cell- wall 



17. Elasticity and Cohesion of Tissues 



54 

 57 



CHAPTER V 



THE STRAINS AND STRESSES IN TISSUES 



1 8. General 



19. The Development and Alteration of the Tissue-strains 



61 

 65 



