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



Plate IV. 



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Fig. 1.— Fruit-pulp Cells, Grape. ■ 30. 



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Fig. 2. -Fruit-pulp Cells. Strawberry, n 3o. 



I'liototrrai.hs by Burton ,1. Howard. 



