37 
39 
Fig.  35-  Corn  starch  grain  treated  with  weak  aqueous  solution  of  safranin. 
Fig.  37.  Potato  starch  grain  treated  with  weak  aqueous  solution  of  gentian- 
violet. 
Figs.  36,  38,  39.  Wheat  starch  grains  treated  with  weak  aqueous  solution  of 
safranin. 
