JACQUES LOEB 



553 



of cc. of 0.1 N Ba(0H)2 or Ca(0H)2 was required to bring a 1 per cent 

 solution of isoelectric gelatin or crystalline egg albumin to a given 

 pH as was required in the case of NaOH or KOH. It can be shown 



680 

 640 

 600 

 560 

 520 

 450 

 g 440 

 ^ 400 



CO 



0) 360 



^3Z0 



•B 280 

 o 



B 240 



O 200 



160 



120 



60 



40 







pH 6 



Q 



9 



10 



11 



12 



Fig. 5. Osmotic pressure of Na caseinate, K caseinate, Ba caseinate, and Ca 

 caseinate. The curves for the former two caseinates are identical and consider- 

 ably higher than those for the latter two caseinates. 



that the same is true for casein. In Fig. 4 the abscissae are the pH, 

 the ordinates the number of cc. of 0.1 n NaOH, KOH, Ca(0H)2, 

 and Ba(0H)2 that must be contained in 100 cc. of a 1 per cent solution 



