22 



A STUDY OF WHEAT. 



figure, show as distinctly as they are generally seen. Frequently 

 there is no appearance of cell structure in either of these coats. 

 Immediately below the two seed-coats is found the outer layer 

 of albumen, seen at the lower left-hand corner of the figure. 

 By the openings aroun'd the edge of the layer, we see that the 



Outer Fruit- Coat. 



Middle Fruit-Coat. 



Inner Fruit-Coat. 



Ff Canals. 



-~. Outer Seed-Coat. 

 v~ Inner Seed-Coat. 



Outer Layer of Albumen. 



vn- 



Sacks of Albumen. 



Fig. j. Showing the Different Coats of Wheat. 



granular matter is contained in sacks. Two of the sacks have 

 floated out and are seen as distinct from the coat. 



In Fig. 4 we have a cross section of a grain of wheat, 

 shaved off nearly midway between the ends. At A, is seen 

 a thickening of the outer fruit-coat, which is given for extra 

 protection to the grain. At B. are seen the openings formed 

 by the cells of the first fruit-coat. They are much larger in 

 some varieties than the cells of the second fruit-coat, as seen 

 at C. The peculiar beaded structure of the third fruit-coat is 



