94 COLLOID CHEMISTRY OF THE PROTEINS 



Table 41. 

 Egg Albumin + 100 c.c. of 0-05 N NaOH. 



fe g m albumin, p percentage of alkali combined, A 

 depression of the freezing point.} 



metric measurements over a wider range of concentrations of 

 albumin and alkali, with the object of comparing the activity 

 of various bases in combining with the protein. The calculation 



of the combined portion of the alkali is similar to that employed 



/" 



for acids ; for strong bases the formula n' = n - - is applic- 

 able, while for weak bases it can be derived by means of the 

 dissociation constant from the expression 



2 



__ ~K(n CQH) C OH . 



These investigations involve the very probable assumption 

 that the salts of albumin with weak bases are well ionised and 

 give positive ions identical with those of the base itself. This 

 conception is amply supported by the results of other experi- 



Table 42. 

 Horse-serum Albumin i per cent. 



Combined fraction of the base per litre. 



