NITROGEN 



COMPOUNDS 



2 9 



out from plants are mainly fats or oils together with waxes, 

 gums, chlorophyll (green coloring matter of plants) and other 

 substances. 



TABLE SHOWING FATS (ETHER EXTRACT) IN PLANT SUBSTANCES 



The grains contain more fat than straw or hay. Hay is usual- 

 ly higher in fat than straw. A certain class of seeds such as 

 cotton seed, peanut, rape, sunflower, and flax seed are important 

 for their high oil content. The oils from some of these seeds, 

 notably the oils from cotton seed and flax seed, are expressed 

 by hydraulic pressure or extracted with some solvent, and sold 

 to us as cotton seed oil, cottolene, linseed oil and similar products. 



THE DISTRIBUTION OF FATS (ETHER EXTRACT) IN PARTS OF CORN 



Fat 

 Per cent. 



Water 

 Per cent. 



Corn grain 5.0 10.6 



Corn bran 5.8 9.1 



Corn germ 7.4 10.7 



Corn cob 0.5 10.7 



Corn (whole plant) 1.3 32.2 



Corn leaves 3.3 8.9 



Corn shucks ... 0.9 8.1 



There is quite a wide variation in the fat content of the differ- 

 ent parts of the corn plant. 



Fats in Animals. Examples of animal fats are hog lard, mut- 

 ton suet, beef tallow and milk fat. The fats of animals are 

 different from the fats of plants. 



