CONTENTS. 



PART I. GENERAL ANATOMY AND PHYSIOLOGY. 



CHAPTER I. 

 Protoplasm. 



PAGE 



General Characters — Chemical Composition;— Consistence — Power 

 of Imbibing Water — Vacuoles — Physical Activity — Naked 

 Protoplasm — Protoplasm Enclosed in Cell Walls 1 



CHAPTER II. 

 The Plant-Cell. 



General Statement — Ectoplasm and Endoplasm — Bands and Strings 

 of Protoplasm — Nucleus — Size of Cells — Forms of Cells — The 

 Cell the Unit in Plants 15 



CHAPTER III. 



The Cell-Wall. 



Composition — Growth in Surface — Growth in Thickness — The 

 Markings on Cell Walls — Theories as to the Mode of Thick- 

 ening — Stratification of tlie Cell Wall — Formation of Chem- 

 ically Different Layers — The Formation of Mucilage — Incom- 

 bustible Substances in the Wall 21 



CHAPTER IV. 

 The Fokmation op New Cells. 



Cell-Formation by Division: (a) Fission; (6) Internal Cell-Forma- 

 tion — Cell-Formation by Union — Examples 36 



