CONTENTS. 



INTRODUCTION. 



PAGES 



Definition of a Cell —Tissues — Function — Outline of Classification 



of Plants, ... 1-6 



CHAPTER I. 



The Nature and Reactions of Protoplasm. 



Composition and Constitution of Protoplasm — Water of Constitu- 

 tion — Irritability — Importance of Water and Oxygen — 

 Turgidity — Conditions for Continued Activity of Proto- 

 ■ plasm, ..... . 7-12 



CHAPTER II. 

 The Stddy or a Living Assimilating Cell. 



A. The Fully Differentiated Assimilating Cell — Structure of the 



Cell — Vital Processes and Action upon the Cell of Re- 

 agents — Significance of Starch-formation — Definition of 

 Assimilation in its Wider Sense, 13-18 



B. Thi Young Undifferentiated Cell — Plastids — Vacuole Forma- 



tion—Growth of the Cell, . 18-22 



CHAPTER III. 



Cells of the External Tissues and Certain Supporting 

 AND Protective Tissues in Plants. 



The Epidermis and Structures in Connection with it — Der- 

 matogen — Stomata, their Structure and Function — Haira, 

 their Structure and Function — Root Hairs — Cortex — 

 Mesophyll — Cork and Cork Cambium — CoUenchyma — 

 Solerenchyma, . . . ... 23-41 



