32 



combinations may serve a better purpose than others. Furthermore, that vitamines 

 — unknown chemical substances — are essential to growth, and that certain feeds 

 may contain more than do others. Finally, that in the case of heavy milking cows 

 liberal feeding, especially with legume hays and green feed, is advised, particularly 

 during the few months previous to the birth of the calf, in order to enable the animal 

 to nourish its foetus and to replace its depleted mineral reserve. 



