THE EARTH'S BOUNTY 



50 per cent., to aid the production of muscle, 

 sinew, horn, and milk. Fattening and work- 

 ing animals retain from 5 to 10 per cent. 



Under all circumstances, and with all kinds 

 of animals, the material fed bears directly on 

 the manure. Agricultural experts have worked 

 out the fertilizing value contained in some of 

 the more general feeding materials, as follows: 



115 



