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° F. shall be used, and aérators 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- 
