As a rule, it is not best to use fish as the main dish of a meal oftener than two or three times a week.
[Illustration: A BABY-MILK STATION The milk sold here for a few cents is perfectly clean and pure, and is variously adapted to the needs of different babies.

In many cities such milk stations have been established.] Milk.

Milk is an interesting food of great value because it combines in itself all three of the great classes of food-stuffs,--protein, starch-sugar, and fat.

Its protein is a substance called _casein_, which forms the bulk of curds, and which, when dried and salted, is called cheese.

The fat is present in little tiny globules which give milk its whitish or milky color.