$3.50, and a copper one, which is much more durable, for $7.00.

[6] Obtained at the same prices from any of the Walker-Gordon
milk laboratories.

_How should milk be cooled after pasteurizing?_

Always by placing the bottles in cold water, so as to cool them
rapidly; never by letting them stand at the temperature of the room,
or by placing them, when warm, in an ice box.

_Why is this precaution necessary?_

Cooling in the air or in an ice box requires from two to four hours,
and during that time a great many of the undeveloped germs may mature
and greatly injure the keeping properties of the milk. In the cold
water, milk can be cooled in from ten to twenty minutes if the water
is frequently changed, or if ice is added to the water.


MODIFIED MILK OF THE MILK LABORATORIES

_What is "modified milk" of the milk laboratories?_

It is milk containing definite proportions of the fat, sugar,
proteids, etc., put up usually according to the prescription of a
physician, who indicates how much of the different elements he
desires. The most reliable are the laboratories of the Walker-Gordon
Company, which has branches in many of the large cities of the United
States.