288 



CHEMISTRY OF THE PROTEIDS 



lytes which cause coagulation we are dealing with the algebraic sum 

 of the antagonistic properties of ions having opposite electrical charges. 

 He assumes that kations have a coagulating and anions a dissolving 

 influence on egg-white, because acids, which have the kation H in 

 common, cause coagulation, while bases, having the anion OH' in 

 common, cause albumins to dissolve. 



If the coagulating values of a series of kations are indicated by 

 /, /', /" ..... and the inhibiting values of a number of anions by h,h,'h", 

 then by combining electrolytes the three following states are possible ; 



which means that it is possible to add to a solution of a coagulating 

 electrolyte, other electrolytes which either increase or diminish or leave 

 unaltered the coagulating power of the first electrolyte. 



In the following t%ble Pauli has arranged the kations in ascending 

 order from left to right, magnesium being the feeblest and lithium the 

 strongest kation, while the anions are so arranged that the one with 

 ( the fullest inhibiting power, namely, fluorine, comes first, while the 

 strongest inhibitor, namely, thiocyanate, comes last. 



It will be seen from the table that the feeble precipitating power 

 of magnesium and ammonium is already interfered with by the acetates 

 and chlorides, while potassium is not affected by nitrates, and so on. 



The criticism which the author has to make to Pauli's very im- 

 portant investigation, apart from the objection already raised on 

 p. 287. is shortly this : It has been assumed throughout by Pauli that 

 the salts only act upon one another, and not also on the albumin. If 

 we consider what effects, especially the halogen salts, have in pre- 

 venting, for example, the setting of gelatine, we must bear in mind 



