220 PRINCIPLES OF FEEDING FARM ANIMALS 



classes of farm animals if they show a craving for mineral 

 matter. 



A distinction should be made between raw bone meal, 

 which is used for feeding purposes, and steamed bone, which 

 is used for fertilizer. Junk bones and bones from condemned 

 animals are often used in the manufacture of bone meal for 

 fertiUzer. Also they are steamed to remove the protein 

 substances which are made up into glue. Thus there is no 

 comparison between the two for feeding purposes. 



