CONTENTS 



Page 

 Preface to the Third Edition vii 



Preface to the First Edition ix 



CHAPTER I 



Cells and Tissues 1 



Description of the cell — Living and fixed cells — Development — Differentia- 

 tion — Correlation — Cell theory and organismal theory. 



CHAPTER II 



Protoplasm 25 



Chemical nature — Physical nature — Colloidal state of matter — Colloidal 

 nature of protoplasm — Ectoplasm and plasma membrane — Vacuole mem- 

 brane — Ectoplast of Protista — Kinoplasm— Protoplasm and metaplasm — 

 Protoplasm and life. 



CHAPTER III 



The Nucleus 48 



General features — Structure — Nucleolus — Functions. 



CHAPTER IV 



Plastids 61 



Occurrence and general characters — Chromoplasts — Photosynthesis — Elaio- 

 plasts — Eyespot — Structure of chloroplast — Origin and multiplication — 

 Conclusions. 



CHAPTER V 



The Golgi Material 73 



Occurrence and general characters — Behavior in cell-division — Role in 

 secretion — Comparison with plant cells. 



CHAPTER VI 



Chondriosomes 82 



Occurrence and general characters — Physical and chemical nature — Origin 

 and multiplication — Function — Chondriosomes and plastids — Conclusion. 



CHAPTER VII 



Ergastic Substances 93 



Vacuoles — Cell sap — Carbohydrates — Proteins — Fats and allied substances 

 — Crystals — Recapitulation: structure of the protoplast. 



CHAPTER VIII 



Somatic Cell-division 105 



Outline of somatic mitosis — Cytokinesis — Cell-division in animals — Dura- 

 tion and periodicity of cell-division — Summary and conclusions. 



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