' 



TABLE OF CONTENTS. 



LECTURE I. 



PAGE 



INTRODUCTORY . . .. -.-,_ i 11 



LECTURE II. 

 THE STRUCTURE AND PROPERTIES OF THE PLANT-CELL 1230 



The Cell- wall, 14 



The Protoplasm, 23 



The Nucleus, 26 



The Vacuole and the Cell-Sap, 28 



LECTURE III. 



THE STRUCTURE AND PROPERTIES OF THE PLANT-CELL, 



{continued?} . . . . . . . 31 45 



The Molecular Structure of Organised Bodies, 31 



The Swelling-up of Organised Bodies (Imbibition), 37 

 The Osmotic Properties of the Cell, 39 



LECTURE IV. 

 ABSORPTION . * . . . . . _..-...,< 4668 



Absorption of Water and Substances in Solution, 46 



LECTURE V. 



ABSORPTION (continued} . ...... . . 6988 



Absorption of Gases, 69 



Absorption of Oxygen, 75 



Carbon Dioxide, 81 



,, Nitrogen, 84 



,, ,, Ammonia, 86 



