58 



Fischer, M. H., and Benzinger, M. ' On the Swelling of Fibrin in Poly basic 



Acids and their Salts.' ' J. Am, Chem. Soc' 40, 292 (1918). 

 Fischer, M. H., and Coffman, W. D. ' On the Liquefaction or " Solution " of 



Gelatin in Polybasic Acids and their Salts.' ' J. Am. Chem. Soc' 40, 303 



(1918). 

 Graham, E. A., and Graham, H. T. ' Retardation by Sugars of Diffusion of 



Acids in Gels.' 'J. Am. Chem. Soc.' 40, 1900 (1918). 

 Hatschek, EivnL. ' Viscosity and Hydration of Colloidal Solutions.' ' Biochem. 



J.' 10, 336 (1916). 



' An Analysis of the Theory of Gels as Systems of Two Liquid Phases.' 



'Chem. News,' 116, 167 (1917). 



Katz, J. R. ' Micella are not necessary for the Explanation of Uncomplicated 

 SweUing.' ' Z. Physiol. Chem.' 96, 255 (1916). The facts are fully covered 

 *l<y the theory of a solid solution of water in the sweUling substance, and in 

 Nagelli's theory inicella can be replaced by inolecules. 



' The Laws of Swelling. The Swelling in Water without Complications.' 

 'KoUoidchem. Beihefte,' 9, 1 (1917). 



Lenk, Emil. ' Importance of Electrolytes for Swelling Processes " : A. The 

 Action of the Individual Electrolytes. B. Combinations of Electrolytes.' 

 ' Biocliem. Z.' 73, 15 and 68 (1916). The conclusion is drawn that the 

 antagonistic actions of ions must be due to colloidal phenomena and not to 

 osmotic pressures. 



LoEB, Jacques. ' Ionization of Proteins and Antagonistic Salt Action.' 

 'J. Biological Chem.' 33, 531 (1918). 



' The Stoichiometrical Character of the Action of Neutral Salts upon the 

 SweUing of Gelatin.' Ihid. 34, 77 (1918). 



Makabe, K., and Matuia, J. ' Physical Changes in the States of Colloids.' 

 XV. Electrochemical Investigations of Acid Albumin. ' Biochem. Z.' 52. 

 369 (1913). The work involved the electrometric determinations of the 

 hydrion and chloridion concentrations of hydrochloric acid solutions of serum 

 albumen and of gelatia. 



Ostwald, Wolfgajsg. ' Importance of Electrolytes for Swelling Processes.' 

 'Biochem. Z.' 77, 329 (1916). 



Pauli, W., and Hirschfeld, M. ' Alteration in the Physical Conditions of 

 Colloids.' XVIII. Protein Salts of Different Acids. 'Biochem. Z.' 62, 

 245. Equal concentrations of protein bind less of a weak than of a stronger 

 acid. 



Procter, H. R. ' On the Action of Dilute Acids and Salt Solutions upon 

 Gelatin. 'KoUoidchem. Beihefte,' 1911; 'J. Am. Leather Chem. Assn.' 

 6, 270 (1911. This paper contains a great deal of valuable experimental 

 data. 



' The Eqiulibrium of DUute Hydrochloric Acid and Gelatin.' ' J. Chem. 

 Soc' 105, 313 (1914). 



' The Combination of Acids and Hide Substance.' London ' Collegium,' 

 1915. A paper dealing with the subject in a more popular style. 



'The SweUing of Gelatin.' 'J. Soc. Leather Trades Chem.' 2, 73 (1918). 

 A reply to Bennett's paper of the same title. 



Procter, H. R., and Wilson, J. A. ' The Acid-Gelatin Eqmlibrium.' ' J. Chem. 

 Soc' 109, 307 (1916). 



' The SweUing of CoUoid JeUies.' ' J. Am. Leather Chem. Assn.' 11, 399 

 (1916). 



Ringer, W. E. ' Further Studies on Pekelharing's Pepsin.' ' Z. Physiol. 

 Chem.' 95, 195 (1915). The action of pepsin and swelling of protein are closely 

 related. 



' Further researches upon Pure Pepsin.' ' Proc. Akad. Wetenschappen,' 

 18, 738 (1915). The point of maximum sweUing of protein does not occur 

 at the same hydrion concentration with different acids. 



' The Importance of the Condition of the Substrate in the Action of 

 Pepsin.' ' KoUoid-Z.' 19, 253 (1916). 



