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IOWA ACADEMY OF SCIENCES. 



larger cells of the scutellum. They contain some starch, con- 

 siderable fat, but mostly protein. The cells of the plumule 



Fig. 9. 

 Mexican corn, popcorn type, a, epidermal cells of capsule; c, capsule; t, testa; c^, 

 alf urone cells; «, starch layer. 



and caulicle are smaller and contain only protein grains. The 

 largest amount of nitrogen is therefore found in the embryo. 



