464 MATiUVL OF CATTLE-FKEDING. 



on meadow or clover liay, a lack o£ pliosphoric acid inay 

 occur, while lime would bo plentifully supplied. 



If, on the other hand, much grain, rootb, and straw or 

 chaff are fed, with little hay, a lack of lime might result. 

 It seems not unlikely that this is sometimes the caubc of 

 the " bone hunger," which causes cattle to seek out and 



chew bones. 



Calves and laiubs are commonly fed on hay and grain, 

 and under these circimistanees experience has shown that 

 a lack of lime or phosphoric acid is not to be feared, since 

 these two classes of feeding-stuffs supply each other's defi- 

 ciencies in this respect, grain containing much phosphoric 

 acid and little lime, and hay nmch lime and little phos- 

 phoric acid. 



Pigs, on the other hand, are frequently fed almost ex- 

 clusively on grain and potatoes, with the addition of sour 

 milk or skimmed milk. All these feeding-stuffs contain 

 large quantities of phosphoric acid and but little lime (with 

 the exception of milk), and experience has shown that the 

 addition of a small amount of lime to the feed of pigs, 

 either as chalk or carefully sifted leached wood ashoh, is 

 often of great value and is to be regarded almost as a 



necessity. 



How Supplied.— Yery few experiments have been made 

 on the amount of inorganic nutrients demanded either by 

 young or mature animals, although it has been fully proved 

 that a lack of them may be a cause of backwardness in 

 growth, or even be fatal Experience shows, however, 

 that such cases are rare, and it is only wh^en the fodder 

 consists largely of materials known to be poor in lime or 

 phosphoric acid that their occurrence is to be apprehended. 



Under such circumstances a lack of linie is easily bup- 

 plied by a " lick stone " of chalk or soft limobtone, or by 



