xiv CONTENTS 



Page 



Chapter XI. The Electrochemistry of Coagulation 252 



1. The Coagulation of the Casemates by Alcohol 252 



2. The AppUcability_of the Ostwald Dilution-Law to Solutions of the 



Caseinates in Alcohol-Water Mixtures 254 



3. The Influence of the Concentration of Alcohol in the Solvent 



upon the Conductivities of Solutions of Potassium Caseinate. . 257 



4. The Interpretation of the Law Xy =-72/ ^^^ 



5. The Viscosities of Solutions of Potassium Caseinate in Alcohol- 



Water Mixtures 266 



6. The Molecular Condition of Potassium Caseinate in 75% Alcohol 268 



7. The Chemical Mechanics of the Coagulation of Proteins by Al- 



cohol 270 



PART III. THE PHYSICAL PROPERTIES OF PROTEIN SYSTEMS 



Chapter XII. The Phenomena which Accompany Changes in 



THE State of Aggregation of Proteins 275 



1. The Passage of Dry Protein into Solution 275 



2. The Swelling of Protein Jellies 292 



3. The Gelatinization and Coagulation of Proteins 299 



4. The Coagulation of Proteins by Heat, Light and Hydrostatic 



Pressure 304 



5. The Crystallization of Proteins 311 



Chapter XIII. Certain Physical Properties of Protein Solu- 

 tions, etc 320 



1. The Viscosity of Protein Solutions 320 



2. The Cohesiveness of Protein Solutions 328 



3. The Elasticity of Protein Solutions 329 



4. The Diffusion of Proteins in Solution 330 



5. The Freezing- and Boihng-points of Protein Solutions 331 



6. The Osmotic Pressure of Proteins in Solution 336 



7. The Nature of Protein Solutions 340 



8. The Opalescence of Protein Solutions; the Tyndall Effect 342 



9. The Surface Tension of Protein Solutions . . . ." 345 



10. The Formation of Surface-films by Dissolved Proteins 345 



11. The Specific Gravities of Protein Solutions 348 



12. The Magnetic Properties of the Proteins 349 



13. The "Gold Number" of Proteins 349 



Chapter XIV. Optical Properties of Protein Solutions 355 



1. The Specific Rotatory Power of the Proteins 355 



2. The Absorption of Light by Protein Solutions 358 



3. The Refractive Indices of Protein Solutions 359 



