In cold weather, carbonaceous food, such as butter, fats, sugar,
molasses, etc., can be used more safely than in warm weather. And they
can be used more safely by those who exercise in the open air than by
those of confined and sedentary habits.
Students who need food with little carbon, and women who live in the
house, should always seek coarse bread, fruits, and lean meats, and
avoid butter, oils, sugar, and molasses, and articles containing them.
Many students and women using little exercise in the open air, grow
thin and weak, because the vital powers are exhausted in throwing off
excess of food, especially of the carbonaceous. The liver is especially
taxed in such cases, being unable to remove all the excess of
carbonaceous matter from, the blood, and thus "biliousness" ensues,
particularly on the approach of warm weather, when the air brings less
oxygen than in cold.
It is found, by experiment, that the supply of gastric juice, furnished
from the blood by the arteries of the stomach, is proportioned, not
to the amount of food put into the stomach, but to the wants of the
body; so that it is possible to put much more into the stomach than
can be digested.
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