VALUATION OF FEEDING STUFFS 229 



Conversely, if the price per unit be known, the price per ton 

 of a sample of the same kind of material of any given com- 

 position can be determined. The former conditions are 

 fulfilled when a feeding stuff is sold at a given price subject 

 to a stated guarantee ; and in the event of a difference between 

 the analysis and the guarantee, the corresponding difference 

 in price can be calculated. Example : a quantity of cake was 

 sold at 8 icx?. delivered and the cost of carriage was los. per 

 ton, i.e. the price of the cake was 8 per ton. The other 

 data were as follows : 



Protein Fat Carbohydrates 



per cent. per cent. per cent. 



Guaranteed .... 30 10 34 



Found 25 9 40 



The price per unit (n) according to the guarantee is 1*2 ; 

 and the number of units found on analysis (125), multiplied by 

 1*2, gives ^7 IQS. per ton; add cost of carriage IQS. and we 

 get ;8 as the price (delivered) that should be paid. 



(2) If the average price per ton and average composition 

 of a feeding stuff be known, the average price per unit can be 

 determined. Conversely, if the average price per unit be 

 known, the average price per ton of a sample of any given 

 composition can be determined ; and by comparing this with 

 the price asked, a purchaser can decide whether or not the 

 same is reasonable. 



(3) By comparing the average price per unit of different 

 foods, a purchaser can form an approximate idea as to which 

 will prove the most economical in a pecuniary sense. On 

 reference to the table (p. 228) it will be seen that oats at 1-67 

 shillings per unit is the most expensive of the foods mentioned 

 there, and that wet brewer's grains at 0-58 shilling per unit 

 is the cheapest. The price per unit of linseed cake is nearly 

 30 per cent, higher than that of cotton cake. 



Having compared the prices, the stockman has still to 

 determine whether the cheaper foods are equally suitable for 

 his purpose. 



Classification. Any classification of feeding stuffs, if it is 

 to be of use for practical purposes, must be . based on the 



