14 



IV^\N C. HALL 



as a matter of chemical equivalence but an attempt to apply the 

 Guldberg-Waage mass law was not successful. 



The present status of our knowledge of the changes which 

 monosaccharids undergo in the presence of alkalis, so well sum- 



TABLE 2 



Decolorization and recoloraiion of varying concentrations of methylene blue in 

 relation to varying concentrations of glucose and alkali 



— indicates no reduction— a blue solution. 

 + indicates reduction — a colorless solution. 



marized by Woodyatt (1915, 1918), indicates a tremendous 

 variety of reactions according to the sugars concerned, the con- 

 centration of hydroxyl ions, degree and time of heating, presence 



