28o LEGUMINOS^ IN THE FEEDING OF LIVE STOCK 



or where it is a question of the digestibility of the starch 

 in starchy nutriments such as the potato and the manioc. 



l^esides, KeHner has retained this formula as only being 

 applicable when it is a question of calculating the ration 

 solely on the digestive principles. 



In short, when it is wished to ascertain the cash value 

 of a nutritive principle in a food one should first know how 

 manv nutritive units it contains, and the resultant figure 

 is divided by tiie price. Such is the usual procedure. 



M. Kellner, on the other hand, converts all the digestible 

 matters into starch and adds to them three-quarters of the 

 weight of the nitrogenous matter, because of the greater value 

 of this latter. It is then seen how much each group comes 

 to, and the product is divided by the quantity of nutritive 

 principles contained. In this way it can be said that the 

 nitrogenous matter in one fodder is worth so much, and in 

 another so much. Similarly the value of the fat or carbo- 

 hydrates may be calculated in a concentrated or in an 

 ordinarv fodder. 



