JACQUES LOEB 



51 



boclcclric point 

 Kegton of 6elatln-'5r 

 andof Gelatin-Cl 



Point of Neutrality 

 Region of 6clatin-Na 



nui concenirauon ^^ ^ ^^^ ^^g 5,^ ,p^^ ^^^^ ^^^^ ^^^^ 



pn 3.6 5/5 42 Ai> 52 5.6 fc4 6.9 71 



73 71 



Fig. 4. NaBr-HCl curves. Minima again at pH = 4.7 (isoelectric point). 

 Curves for osmotic pressure, swelling, and alcohol number almost symmetrical in 

 regard to isoelectric point. On left side gelatin chloride and bromide, on right 

 side sodium gelatinate. 



