9 



The presence of ground cob in meal can often be detected by 

 chewang a portion of the feed, when the hard woody fibre of the 

 cob can be felt in the mouth. ^^^ 



The hairs found in corn cob vary greatly in size and shape. 

 The single celled hairs, however, are usually long, with a cell 

 cavity or lumen several times thicker than the walls of the hair, 

 extending well up into the tip. The multicellular hairs seem 

 to have thicker walls, and are usually shorter, with a blunt tip 

 on the terminal cell and are often pitted. These elements are 

 shown in Fig. 2. 



RICE. 



{Oryza saliva, L.) 



Rice used largely as a human food, is now being found in 

 cattle feeds. When the grain itself is found in the feed the 

 identification is a simple matter, as it depends entirely on the 

 starch grains which have a characteristic size and appearance. 

 They are sometimes distorted, owing to a cooking process, but 

 can ordinarily be identified without much trouble. The starch 



cells. 



Fig. 3. Rice. 



Figure 3 

 (1) Rice starch; (2) Cells from epicarp; (3) Epidermal 



grains are in size the smallest of the poh^gonal starches, having 

 a range of from 2 — 9 n in diameter, very rarely exceeding the latter 



1 J. B. Lindsey, Mass. Ag'I. Exp. Sta. 



