366 Mr. S. B. Schryver. Investigations dealing with the 



BIBLIOGRAPHY. 



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Investigations dealing with the Phenomena of 11 Clot" Formations. 

 Part II. — The Formation of a Gel from Cholate Solutions 

 having Many Properties analogous to those of Cell Membranes. 

 By S. B. Schryver. 



(Communicated by Prof. V. H. Blackman, F.E.S. Eeceived January 22, — Eead 



February 19, 1914.) 



In the first communication under the above title,* attention was called to the 

 fact that solutions of sodium cholate, on warming in the presence of calcium 

 salts, set to a gel, which is not reversible on cooling. It has since been found 

 that calcium salts can be replaced by other salts, such as sodium chloride, 

 magnesium chloride, ammonium sulphate and potassium fluoride, and the clot 

 formation is not therefore due to double decomposition between calcium salts 

 and sodium cholate. The concentrations of sodium, potassium, and magnesium 

 salts necessary to produce the " clot " are, however, much higher than that of 

 calcium chloride, which even in the concentration of N/40 can cause 1-per-cent. 

 sodium cholate to set to a solid gel in about a quarter of an hour at 50°. 

 Sodium. and magnesium chlorides produce clot formation at 50°, when their 



* ' Roy. Soc. Proc.,' B, vol. 86, p. 460 (1913). 



