CONTENTS 



CHAPTER I 

 THE PLANT CELL 



PAGE 



The Protoplast. Plasma Membrane or Ectoplasm. General 

 Cytoplasm. The Nucleus. The Plastids. Cell-divi- 

 sion. Cell Differentiation. Sizes of Cells. The Cell- 

 wall. The Chemical and Physical Nature and Physio- 

 logical Powers of the Protoplast. Illustrative Studies . 1-23 



CHAPTER II 



DIFFERENTIATION OF THE TISSUES 



General Survey. The Primordial Meristem. The Pro- 

 toderm. The Procambium. The Ground Meristem. 

 The Primary Permanent Tissues. Illustrative Studies. 24-45 



CHAPTER III 



SECONDARY INCREASE IN THICKNESS 



Dicotyledons and Gymnosperms. Growth of the Vascular 

 Bundles. Increase in the Cortex. Monocotyledons. 

 Unusual Growth in Thickness. Illustrative Studies . . 46-60 



CHAPTER IV 

 PROTECTION FROM INJURIES AND Loss OF WATER 



The Epidermis. The Epidermis as a Protective Tissue. 

 The Epidermis as a Waterproof Covering. The Radial 



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