CONTENTS. 



PAGE 



INTRODUCTION . i 



PART I. 

 THE PHYSICAL PROPERTIES OF THE PROTEINS. 



SECTION 



I. THE SOLUBILITY OF PROTEINS IN SALT SOLUTIONS; THE 



"SALTING OUT" FROM SOLUTIONS .... 8 



II. THE DEGREE OF SOLUBILITY OF PROTEINS IN SALT SOLU- 

 TIONS 15 



III. SOLUBILITY OF PROTEINS IN ORGANIC SOLVENTS . . 16 



IV. SEPARATION OF PROTEINS FROM SOLUTION BY PRECIPIT- 



ANTS OTHER THAN SALTS I^ 



V. CRYSTALLISATION OF PROTEINS 18 



VI. THE TEMPERATURE OF HEAT COAGULATION OF PROTEIN 



SOLUTIONS 21 



VII. OPTICAL ROTATION OF PROTEIN SOLUTIONS ... 24 



VIII. MOLECULAR WEIGHT DETERMINATIONS BY CRYOSCOPIC 



METHODS 24 



IX. THE ELECTROLYTIC CONDUCTIVITY OF PROTEIN SOLUTIONS 26 



X. THE "GOLD NUMBER" 27 



XI. THE FRACTIONAL FILTRATION OF PROTEINS ... 28 



ix 



