Bui. 66, Bureau of Chemistry, U. S. Dept. Agr. 



Plate II 



Fig. 1 .— Fruit-fulp Cells, Quince. : 3D. 



Fig. 2.— Fruit-pulp Cells, Plum, v 30. 



l'hotograi)h>^ l.y Burton .1. lIowanL 



