CONTENTS 



PAGE 

 PREFACE ; . V 



PART I 

 Proof of the Stoichiometrical Character of the Reactions of Proteins 



CHAPTER I 

 HISTORICAL INTRODUCTION ; 1 



1. The Alleged Difference Between the Chemistry of Colloids and 



of Crystalloids . . ; 1 



2. The Isoelectric Point of Proteins 6 



3. The Adsorption Theory and the Precipitation of Proteins . . 10 



4. The Hofmeister Ion Series 13 



5. The Aggregation Hypothesis 15 



6. Pauli's Hydration Theory 17 



7. Donnan's Membrane Equilibrium 19 



CHAPTER II 



QUALITATIVE PROOF OF THE CORRECTNESS OF THE CHEMICAL VIEW- 

 POINT. PREPARATION OF PROTEINS FREE FROM IONOQENIC 

 IMPURITIES 27 



CHAPTER III 



METHODS OF DETERMINING THE ISOELECTRIC POINT OF PROTEIN 



SOLUTIONS 37 



CHAPTER IV 



QUANTITATIVE PROOF OF THE CORRECTNESS OF THE CHEMICAL VIEW- 

 POINT 40 



CHAPTER V 



THE VALENCY RULE AND THE HOFMEISTER SERIES 65 



A. Osmotic Pressure _. 65 



B. Swelling 76 



C. Viscosity 82 



ix 



