CHEMICAL COMPOSITION OF MAIZE GRAIN 655 • 



The crown starch may be dug out with the knife, care CHAP, 

 being taken not to remove any of the horny starch. XIIL 



The tip starch is removed in the same way. 



Fig. 227. — Enlarged longitudinal section of maize grain. The internal 

 structure is diagrammatic, the cells as here shown being about 100 times larger 

 than their true proportion to the rest of the illustration. A, 1, hull; 2, testa; 

 3, aleurone layer; 4, endosperm cells; 5, scutellum ; 6. plumule, or bud of the 

 embryo ; 7, primary root ; 8, root-sheath ; g, a row of cells similar in appearance to 

 the aleurone layer but smaller. B, section more highly magnified, showing, 

 i.epicarp; 2, testa ; 3, aleurone layer ; 10, perisperm. (From Hunt, The Cereals 

 in America, Orange Judd Co.) 



