water, and cooled before the milk is poured into it.

[Illustration: Fig. 6]

53. Particular care should be taken of the empty milk bottles. They
should never be used for anything except milk. Before they are returned
to the dairyman to be used again, they should first be rinsed with cold
water, then washed thoroughly with hot, soapy water, and finally rinsed
with hot water. If there is illness in the home, the washed bottles
should be put into a pan of cool water, allowed to come to a boil, and
permitted to boil for a few minutes. Such attention will free the
bottles from any contamination they might have received. The dairyman,
of course, gives the bottles further attention before he uses them
again, but the housewife should do her part by making sure that they are
thoroughly cleansed before they are collected by him.

54. KEEPING MILK COOL IN THE HOME.--As has been pointed out, milk
should, upon being received, be kept in the coolest place available,
which, in the majority of homes at the present time, is the
refrigerator. In making use of the refrigerator for this purpose, the
housewife should put into practice what she learned in _Essentials of
Cookery_, Part 2, concerning the proper placing of food in the
refrigerator, remembering that milk should be placed where it will
remain the coolest and where it is least likely to absorb odors. She
should also bear in mind that the temperature inside of a refrigerator
varies with that of the surrounding air. It is because of this fact that
milk often sours when the temperature is high, as in summer, for
instance, even though it is kept in the refrigerator.

55. In case a refrigerator is not available, it will be necessary to