8ul. 66, Bureau of Cnemistry, U. S. Dept. Agr 



Plate V. 



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Fig. 1.— Fruit-pulp Cells, Red Raspberry, x 30. 



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Fig. 2.— Fruit-pulp Cells. Black Raspberry. % 3o. 



rhotoKraphs \)\ Burtim .1. Howard. 



