THE DAIRY 127 



No. 63. Care of Milk on the Farm. 



No. 151. Dairying in the South. 



No. 166. Cheese Making on the Farm. 



No. 201. The Cream Separator on Western Farms. 



DEFINITION. A per cent is a fraction whose de- 

 nominator is 100. Thus: i-ioo is i per cent, 2-100 

 is 2 per cent, 5-100 is 5 per cent, and so on. There are 

 three ways of writing per cents, thus : 2-100 = .02 = 

 2%. They all mean exactly the same thing. 



Problems. 



1. How many pounds of butter- fat in 5,000 pounds 

 of milk that tests 4 per cent? 



2. A farmer owns a herd of 15 cows that average 

 24 pounds of milk per head daily. How many pounds 

 of milk does he get in six months (thirty days each) ? 



3. If this milk tests 3.5 per cent, and butter-fat is 

 worth 25 cents per pound, what does he receive 

 monthly for his milk ? How much per head ? 



4. A farmer has a herd of 20 cows. The milk for 

 the week weighs as follows: 420 Ibs., 418 Ibs., 408 

 Ibs., 422 Ibs., 417 Ibs., 432 Ibs. and 423 Ibs., respec- 

 tively. It tests 5 per cent of butter-fat, the price of 

 which is 30 cents per pound. How much do the cows 

 average per head in money for this week ? 



5. A farmer hauls 43,250 Ibs. of milk that tests 

 3.8 per cent to a factory. The price of butter-fat is 

 26 cents per pound. How much money should he 

 receive ? 



