few paragraphs
from Dr. Kellogg's work on Physiology, in which is given a concise
summary of the more important points relating to this:--

"The hygiene of digestion has to do with the quality and quantity of
food eaten, in the manner of eating it.

"_Hasty Eating._--If the food is eaten too rapidly, it will not be
properly divided, and when swallowed in coarse lumps, the digestive
fluids cannot readily act upon it. On account of the insufficient
mastication, the saliva will be deficient in quantity, and, as a
consequence, the starch will not be well digested, and the stomach will
not secrete a sufficient amount of gastric juice. It is not well to eat
only soft or liquid food, as we are likely to swallow it without proper
chewing. A considerable proportion of hard food, which requires thorough
mastication, should be eaten at every meal.

"_Drinking Freely at Meals_ is harmful, as it not only encourages hasty
eating, but dilutes the gastric juice, and thus lessens its activity.
The food should be chewed until sufficiently moistened by saliva to
allow it to be swallowed. When large quantities of fluid are taken into
the stomach, digestion does not begin until a considerable portion of
the fluid has been absorbed. If cold foods or drinks are taken with the
meal, such as ice-cream, ice-water, iced milk or tea, the stomach is
chilled, and a long delay in the digestive process is occasioned.

"The Indians of Brazil carefully abstain from drinking when eating, and
the same custom prevails among many other savage tribes.

"_Eating between Meals._--The habit of eating apples, nuts, fruits,
confectionery, etc., between meals is exceedingly harmful, and certain
to produce loss of appetite and indigestion. The stomach as well as the
muscles and other organs of the body requires rest. The frequency with
which meals should be taken depends somewhat upon the age and occupation
of an individual. Infants take their food at short intervals, and owing
to its simple character, are able to digest it very quickly. Adults
should not take food oftener than three times a day; and persons whose
employment is sedentary say, in many cases at least, adopt with
advantage the plan of the ancient Greeks, who ate but twice a day. The
latter custom is quite general among the higher classes in France and
Spain, and in several South American countries.

"_Simplicity in Diet._--Taking too many kinds of food at a meal is a
common fault which is often