17G AGRICULTURE. 



sold at retail in cities is required in most places, 

 either by state or city law, to contain not less 

 than a certain per cent, of butter fat usually 3 

 or 3.25 per cent. 



Problem. A owned a cow giving milk which averaged 

 2.7 per cent, butter fat. B owned a cow giving milk 

 averaging 7 per cent, butter fat. 



C bought one gallon (8.4 pounds) of milk of A daily, 

 from March ist to September ist, at 6 cents a quart. 



D bought milk of B for the same time, buying the 

 same amount daily, at the same price per quart. If 

 butter fat was worth 25 cents per pound at the cream- 

 ery, how much did D gain by buying milk of B instead 

 of A for the six months named ? Did he pay more or 

 less than the milk would have sold for by the test, sup- 

 posing that a gallon of the milk weighed 8.4 pounds ? 

 How much ? 



Another and possibly the greatest value of 

 the test is as a means of enabling the farmer 

 to judge which cows are profitable and which 

 are not. The writer once fed two Jersey cows 

 standing side by side the same kind of feed and 

 practically the same amount to each. During 

 the year one produced 145 pounds of butter, 

 the other 428 pounds. 



The farmer should take into account not the 

 per cent, of butter fat alone, but the amount of 

 milk and the test together. The following is 

 the record of two cows in the same herd : 



Pounds Pounds Prr cent. 



Milk Butter Butter Fat 



No. i I2,in 538 3.81 



No. 2 6,523 532 7.00 



