so much less meat available but so much less of an adequate substitute.
Lean meat contributes to the diet chiefly protein and iron. We eat it
primarily for the protein. Hence in comparing meat and milk we think first
of their protein content. One and one-fourth cups of milk will supply as
much protein as two ounces of lean beef. The protein of milk is largely
the part which makes cottage cheese. So cottage cheese is a good meat
substitute and a practical way of using part of the skim milk when the
cream is taken off for butter. One and one-half ounces of cottage cheese
(one-fourth cup) are the protein equivalent of two ounces of lean beef.
Skim milk and buttermilk are just as good substitutes for meat as whole
milk. Since meat is one of the most expensive items in the food bill, its
replacement by milk is a very great financial economy. This is true even
if the meat is raised on the farm, as food for cattle is used much more
economically in the production of milk than of beef.

_Milk is the greatest source of calcium (lime)._ Lime is one of the
components of food that serves two purposes; it is both building material
for bones and regulating material for the body as a whole, helping in
several important ways to maintain good health. It is essential that
everyone have a supply of lime and particularly important that all growing
infants, children, and young people have plenty for construction of bones
and teeth. There is almost none in meat and bread, none in common fats and
sugars, and comparatively few common foods can be taken alone and digested
in large enough quantities to insure an adequate supply; whereas a pint of
milk (whole, skim, or buttermilk) will guarantee to a grown person a
sufficient amount, and a quart a day will provide for the greater needs of
growing children. Whatever other foods we have, we cannot afford to
leave milk out of the diet because of its lime. Under the most favorable
dietary conditions, when the diet is liberal and varied, an adult should
have _at least_ half a pint of milk a day and no child should be