CONTENTS 



CHAPTER I 



PAGE 



THE SCOPE OF THE NEW METHOD . 1 



CHAFTER II 



THE GENERAL PRINCIPLES OF THE METHOD THE APPARA- 

 TUS REQUIRED THE SPECIAL PHOTOMICROGRAPHIC 

 APPARATUS THE REVOLVING APPARATUS . 15 



CHAPTER III 



THE PREPARATION OF THE JELLY-FILM 36 



CHAPTER IV 



CELLULAR STAINING, DEATH, AND ACHROMASIA 41 



CHAPTER V 



THE DIFFUSION OF SUBSTANCES INTO LIVING CELLS THE 



" COEFFICIENT OF DIFFUSION" 61 



CHAPTER VI 



THE PRACTICAL DETERMINATION OF THE " COEFFICIENT OF 

 DIFFUSION" OF CELLS, AND ITS APPLICATION TO THIS 



"IN- VITRO" Method of Research 81 



xxi 



