duty.--_Sel._

Much of the air of the house comes from the cellar. A heated house
acts like a chimney. A German experimenter states that one half of
the cellar air makes its way into the first story, one third into
the second, and one fifth into the third.




CEREALS AND THEIR PREPARATION FOR THE TABLE

Cereal is the name given to those seeds used as food (wheat, rye, oats,
barley, corn, rice, etc.), which are produced by plants belonging to the
vast order known as the grass family. They are used for food both in the
unground state and in various forms of mill products.

The grains are pre-eminently nutritious, and when well prepared, easily
digested foods. In composition they are all similar, but variations in
their constituent elements and the relative amounts of these various
elements, give them different degrees of alimentary value. They each
contain one or more of the nitrogenous elements,--gluten, albumen,
caseine, and fibrin,--together with starch, dextrine, sugar, and fatty
matter, and also mineral elements and woody matter, or cellulose. The
combined nutritive value of the grain foods is nearly three times that
of beef, mutton, or poultry. As regards the proportion of the food
elements necessary to meet the various requirements of the system,
grains approach more nearly the proper standard than most other foods;
indeed, wheat contains exactly the correct proportion of the food
elements.