CONTENTS 



CHAPTER I. PAGK 



Introduction 1 



The History of the Cell Theory 2 



The History of the Protoplasmic Theory 



Literature . . 9 



CHAPTER II. 

 The Chemico-physical and Mobphological Properties of the Cell . 11 



I. The Chemico-physical and Morphological Properties of the Proto- 



plasm . . . . . . . . . .11 



(a) Justification of the Use of the Term Protoplasm . . .12 



(b) General Characteristics of Protoplasm .... 13 



(c) Chemical Composition of Protoplasm ..... 15 



(d) The more minute Structure of Protoplasm .... 18 



(e) Uniformity of Protoplasm. Diversity of the Cell . . .26 

 (/) Various examples of the Structure of the Cell-body . . 27 



1. Cells consisting almost entirely of Protoplasm . . 27 



2. Cells which contain several different substances in 



their Protoplasm . . . . . . .31 



II. The Chemico-physical and Morphological Properties of the Nucleus 30 



(a) The form, size and number of Nuclei ..... 37 



{b) Nuclear Substance 40 



(c) The Structure of the Nucleus. Examples of its various 



Properties , 45 



III. Are there Elementary Organisms existing without Nuclei? . . 54 



IV. The Central or Pole Corpuscles of the Cell 55 



V. Upon the Molecular Structure of Organised Bodies ... 58 



Literature 61 



CHAPTER III. 

 Tue Vital Properties of the Cell 



The Phenomena of Movement 



Protoplasmic Movements ....... 



(a) The Movements of naked Protoplasm .... 



{b) The Movements of Protoplasm inside the Cell-Membrane 

 (c) Theories concerning Protoplasmic Movements 



xiii 



65 



65 

 66 

 66 

 71 

 73 



