Bui. 160, Bureau c/ Chemistry, U. S. Dept. of Agriculture. 



PLATE II. 



FIQ. 1 PRUNE. SECTION AT SURFACE OF KERNEL (x 175). 



FIQ. 2. PRUNE. SURFACE OF INTEGU- 

 MENT (X 75). 



FIQ. 3. APRICOT. SURFACE OF INTEGU- 

 MENT (X 75). 



FIG 4. FILBERT. SECTION AT SURFACE 

 OF KERNEL (x 175). 



FIG. 5. FILBERT. SURFACE OF INTEGU- 

 MENT (X 175). 



