Bul. 183, U. S. Dept. of Agriculture. PLATE IV. 
PHOTOMICROGRAPH OF A PART OF THE SCUTELLUM AND ENDOSPERM OF A GERMI- 
3 NATING BARLEY GRAIN. 
The initial stage of germination is shown. Enzymatic action has begun in front of the epithelial 
layer (a), but not next the aleurone (0). 
