572 Dr. Armstrong and Prof. Armstrong. Studies on [June 13, 



and 3, representing the two amino-glucosides formed by the interaction of 

 «- and /3-glucose with the amino-radicle in a molecule of a complex albuminoid 

 material.* 



The models used serve to show the spatial arrangement of the atoms in the 



4. 



Fig. 2. — a-glucase. 



Fig. 3. — /3-glucase. 



acceptor : actually, the atoms in the glucoside would be close packed and in 

 immediate proximity to the main mass of the colloid represented in the 

 diagram by a sponge and probably would constitute but a slight excrescence 

 on its surface. 



* Cp. van Laer, " Sur la Nature de F Amylase," 'Bull. Acad. Eoy. Belg.,' 1913, p. 395. 



