CONTENTS xiii 



Page 



4. Compounds of the Proteins with the Alkaloidal Reagents, Dyes, 



Alkaloids, etc 145 



5. The Compounds of Proteins with Soaps and Lipoids 148 



6. The Compoimds of Proteins with Proteins and their Possible 



Significance in Life-phenomena 148 



7. Compounds of the Proteins with Toxins, Antibodies, Ferments, etc. 156 



8. Methyl and Benzoyl Derivatives of the Proteins 156 



9. The Halogen- and Nitro-substitution Compounds of the Proteins. 157 



10. The Compounds of Proteins with Sulphur 159 



11. The Compounds of Proteins with Oxygen 159 



PART II. THE ELECTROCHEMISTRY OF THE PROTEINS 



Chapter VIII. The Formation and Dissociation of Protein Salts 167 



1. Compounds of the Proteins with Inorganic Bases and Acids; the 



Non-dissociable Character of the Inorganic Radical 167 



2. The Electrolysis of Protein Salts 176 



3. The Relative Masses of Protein Anions and Cations 184 



4. The Migration-velocity of Protein Ions 187 



5. Objections to the above Theory of Protein Ionization 189 



6. Biological Apphcations; the "Selective" Action of Living Tissues. 192 



Chapter IX. The Combining-Capacity op the Proteins 195 



1. The Electrochemical Determination of the Combining-capacity 



of the Proteins 195 



2. The Combining-capacity of Casein for Bases and of Ovomucoid 



for HCl at Absolute Neutrahty 204 



3. The Non-dependence of the Composition of the Compoimds of 



Protein with Acids and Bases upon the Dilution of their Solu- 

 tions 206 



4. The "Isoelectric" Condition of Proteins at Certain H+ and OH' 



Concentrations 209 



5. Biological Apphcations; the Neutrahty of the Tissues and of the 



Tissue-fluids 211 



Chapter X. The Electrical Conductivity of Solutions of Pro- 

 tein Salts 220 



1. The Influence of Dilution upon the Conductivity of Solutions of 



Protem Salts 220 



2. The Depression of the Freezing-point of Water which is Caused by 



Dissolved Protein Salts, and the Stoichiometry of Protein Salts. 236 



3. The Dependence of the Electrical Conductivity of Solutions of 



Protein Salts upon the Proportion of Inorganic Acid or Base 

 which the Salts Contain 242 



4. The Solubihty and Minimal Combining-capacities of Casein and 



of Serum Globulin in Solutions of Bases 248 



