MARKET MILK 183 



of milk testing 4 per cent fat. The diagram will appear as 

 follows : 



3.8 





.9 



Discarding the decimal points for convenience, we can now 

 make up the 200 pounds of 4 per cent milk by taking -fr (or 

 163.64 pounds) of the amount from the milk testing 3.8 per 

 cent and -fi (or 36.36 pounds) from the milk testing 4.9 per 

 cent fat. 



DELIVERY IN TOWN AND CITY 



There are two general methods by which milk is delivered 

 to the consumer by dipping from a large can into the re- 

 ceptacle furnished by the consumer, or in bottles which are 

 furnished by the dealer and which are filled and capped at the 

 milk-plant. When milk is dipped from a can, unless special 

 care is taken to keep it well stirred, the percentage of fat in 

 the milk delivered to different consumers may vary widely. 

 Wing found that one customer received milk with 3.85 per cent 

 of fat, while another served from the same can received 5.05 

 per cent fat. The dipping method subjects the milk to con- 

 siderable exposure to dust and dirt on the street and even to 

 infection by disease germs. This method is not approved by 

 health officials and in most places it is going out of use. In 

 the larger cities, dipping milk is prohibited by the health au- 

 thorities, and all milk is delivered in sealed bottles. There 



