310 PRINCIPLES AND PRACTICE OF MILK HYGIENE 



bottling room shall be kept scrupulously clean and free from 

 odors. 



36. Temperature of Milk. Proper cooling to reduce the 

 temperature to 45 Ft shall be used, and aerators shall be so 

 situated that they can be protected from flies, dust, and odors. 

 The milk shall be cooled immediately after being milked, and 

 maintained at a temperature between 35 and 45 F. until 

 delivered to the consumer. 



37. Sealing of Bottles. Milk, after being cooled and bot- 

 tled, shall be immediately sealed in a manner satisfactory to 

 the commission, but such seal shall include a sterile hood 

 which completely covers the lip of the bottle. 



38. Cleaning and Sterilizing of Bottles. The dairy building 

 shall be provided with approved apparatus for the cleansing and 

 sterilizing of all bottles and utensils used in milk production. 

 All bottles and utensils shall be thoroughly cleaned by hot 

 water and sal soda, or equally pure agent, rinsed until the 

 cleaning water is thoroughly removed, then exposed to live 

 steam or boiling water at least twenty minutes, and then kept 

 inverted until used, in a place free from dust and other con- 

 taminating materials. 



39. Utensils. All utensils shall be so constructed as to be 

 easily cleaned. The milk pail should preferably have an ellip- 

 tical opening five by seven inches in diameter. The cover of 

 this pail should be so convex as to make the entire interior of the 

 pail visible and accessible for cleaning. The pail shall be made 

 of heavy seamless tin, and with seams which are flushed and 

 made smooth by solder. Wooden pails, galvanized-iron pails, 

 or pails made of rough, porous materials, are forbidden. All 

 utensils used in milking shall be kept in good repair. 



40. Water Supply. The entire water supply shall be abso- 

 lutely free from contamination, and shall be sufficient for all 

 dairy purposes. It shall be protected against flood or surface 

 drainage, and shall be conveniently situated in relation to the 

 milk house. 



41. Privies, etc., in Relation to Water Supply. Privies, 

 pig-pens, manure piles, and all other possible sources of con- 

 tamination shall be so situated on the farm as to render im- 



