8 



recognized with the naked eye, and the more finely ground feeds 

 are to a great extent recognized by the characteristic starch 





Fig. 2. 

 from glume, 

 starch. 



Figure 2 



Maize. (1) Epidermis and (2) single and multiple celled hairs 

 (3) Cells h'om woody zone, and (4) haii's from cob. (5) Corn 



grains. The grains are roughly polygonal in shape and vary in 

 size fron 15—30 ju in diameter. The hilum is distinctly \-isible 

 and usually has radiating clefts. The laminae or rings are not 

 visible under normal conditions, and the grains do not occur in 

 compact aggregates as do some of the other polygonal starches. 

 The only other starches likely to be confused with that of maize, 

 are those of the broom corn, and these are practically the same 

 and it is impossible to differentiate them. 



The presence of ground cob in a feed is easily determined 

 also, and the two or three characteristics given below are suffi- 

 cient for its identification. 



Fragments of the glumes and palets can be picked out and 

 examined under the microscope, the cells having wavy walls, 

 and often one to three or four celled hairs are present. Thick- 

 ened glumes consisting of woody tissue are usually present and 

 the characteristic stone cells are another aid in the diagnosis. 



