CONTENTS 



FOREWORD 



1. NUCLEIC ACIDS 



2. THE INTERPHASE CELL AND THE CYTOPLASM 



3. THE INTERPHASE NUCLEUS .... 



Nucleus of chick and mammalian cells in living tissue cultures 



Chromosomes and the deoxyribonucleoproteins 



The nucleoli 



Heteropycnosis 



Proteins of the nucleus 



Lipoids of the nucleus 



Nuclear membrane 



Size of the interphase nucleus and of the chromosomes 



Isolation of chromatin threads from resting nuclei 



4. CELLS IN DIVISION .... 



Prophase and telophase in the living nucleus 



Time scale of the mitotic cycle 



Structure of chromosomes 



Composition of chromosomes . 



The Central body ..... 



Chromosomes and the achromatic figure . 



The Spindle (by M. M. Swann, Department of Zoology 



University of Cambridge) 

 General cytoplasmic changes during mitosis 

 Modifications of mitosis .... 



5. EXPERIMENTAL ANALYSIS 



Nature of the stimulus to mitosis (by C. Waymouth, Chester 



Beatty Research Institute, London) 

 Inhibitory studies on mitosis 



6. OUTLOOK . . . . 

 INDICES 



Vll 



20 



30 

 30 

 30 

 38 

 43 

 47 

 50 

 51 

 53 

 63 



70 

 70 

 82 

 91 



lOI 



106 

 III 



"9 

 133 

 149 



163 



163 

 183 



207 



213 



67746 



