The net cost of the feed consumed is obtained by deducting eighty 

 per cent, of the current commercial vahie of the essential fertilizing- 

 constituents contained in the feed from the market cost of the feed. 

 — See 



Bessie. 

 Market value of feed consumed, $59 00 



Value of manure obtainable, 22 27 



Net cost of feed, $36 73 



The total value obtained for the feed consumed is ascertained by 

 adding the value secured from the sale of the milk produced to the 

 commercial value represented in the manure obtainable. — See 

 Bessie. 

 Value of the milk sold, .$111 73 



Value of 80 per cent, of the manurial substances in 



feed, 22 27 



• Total value obtained from feed consumed, $134 00 



The total value secured from any individual cov?^, after net cost of 

 feed and of cow has been accounted for, is represented by the sum 

 resulting from the addition of the difference between original cost of 

 cow and its selling price, and of the total cost of feed consumed. — 



See 



Bessie. 



Original cost of cow, $65 00 



Selling price of cow, 25 00 



Difference, 



Loss on cow, 

 Total cost of feed, 



Total value obtained from feed consumed. 

 Total cost of feed and loss on cow. 



Net return for feed, $35 00 



It seems to be scarcely necessary to add, that the above estimates 

 refer only to the cost of the feed and of the cow, and do not include 

 cost of labor, housing, interest and risk of life of animal, etc. 



