Bui. 108, Bureau of Chemistry, U. S. Dept. of Agriculture. 



PLATE III. 



FIG. 1. EPIDERMAL LAYER OF SORREL SEED 

 (X 150.) 



FIG. 2. EPIDERMAL LAYER OF GLUME OF 

 YELLOW FOXTAIL. (X 150.) 



FIG. 3. HEMIN CRYSTALS. (X 600.) 



FIG. 4. FRAGMENT OF BONE SHOWING LACUN/E. 



