66 NUTRITION OF FARM ANIMALS 



TABLE 19. NITROGEN IN FAT- AND ASH-FREE DRY MATTER 



With the exception of Soxhlet's experiments, the percentage 

 of nitrogen approximates closely to that of animal proteins. 

 If account be taken of the fact that the ether-extraction method 

 used in these investigations does not completely remove the 

 fat from dried animal tissue, the conclusion appears justified that 

 the organic matter other than fat contained in the animal body 

 has substantially the composition of protein. 



4. THE COMPOSITION or FEEDING STUFFS 



100. Groups of ingredients. As in the case of the animal 

 body, the vast number of single chemical compounds found 

 in the plant, as well as the lack of accurate quantitative methods 

 for the determination of many of them, renders it practically 



