The Titration Curve of Gelatine. 



85 



calculation from the value for and the value for the iso-electric point, 

 if 839 is taken as the reacting weight. 



5. It is suggested that the number of positions of attachment for bases is 



not the same as the number of positions for acids, i.e., that the reacting 



. molecular weight . , . , „ v , ,. 



weight = ; — — ; — - is not tlie same in acid and alkaline solution. 



basicity (or acidity) 



6. It has not been found possible to calculate a value for K a . 



7. It would appear that in concentrations of sodium hydroxide about 

 01 N the structure of the molecule undergoes some change. 



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