286 SCIENTIFIC FEEDING OF ANIMALS 



Digested material. 



Live 

 Ag*. 



5-6 



7-9 



10-12 



13-15 

 16-24 



The storage of mineral matter per day and per 

 head was : 



Potash, soda, lime, and magnesia, according to 

 the above, are retained in about the same quanti- 

 ties at the various ages, whereas the phosphoric 

 acid is held back in the body in increasing quanti- 

 ties. 



Owing to the demand of growing animals for 

 mineral matter this point should have special 

 attention in feeding, for a lack of these substances, 

 particularly of lime and phosphoric acid, brings 

 serious results (p. 96). It must further be remem- 

 bered that the animals are not in a position to make 

 use of all the mineral matter in the food. From 



