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See also: term for what• is eaten by See also: man and other creatures for the sustenance of See also: life
.
The scientific aspect of human See also: food is dealt with under See also: NUTRITION and See also: DIETETICS
.
See also: Infancy.—The influence of a normal See also: diet upon the See also: health of man (we exclude here the question of diet in illness, which must depend on the abnormal conditions existing) begins at the earliest stage of his life
.
No food has as yet been found so suitable for the See also: young of all animals as their See also: mother's milk
.
This, however, has not been from want of seeking
.
Dr Brouzet (Sur l'See also: education medicinale See also: des enfants, i. p
.
165) had such a See also: bad opinion of human mothers, that he expressed a wish for the See also: state to interfere and prevent them from suckling their See also: children, lest they should communicate immorality and disease
!
A still more determined pessimist was the famous chemist See also: Van Helmont, who thought life had been reduced to its See also: present shortness by our inborn propensities, and proposed to substitute See also: bread boiled in See also: beer and honey for milk, which latter he calls " brute's food." Baron Justus von Liebig, as the result of his chemical researches, introduced a " food for infants," which in more See also: modern days has been followed by a multiplication of patent foods
.
A close imitation of human milk may also be made by the addition to fresh cow's milk of See also: half its bulk of soft See also: water, in each See also: pint of which has been mixed a heaped-up teaspoonful of powdered " See also: sugar of milk " and a pinch of phosphate of lime
.
These artificial substitutes for the natural nutriment have their value where for any reason it is not available
.
The wholesomest food, however, for the first six months is certainly mother's milk alone
.
A vigorous baby can indeed bear with impunity much rough usage, and often appears none the worse for a certain quantity of farinaceous food; but the majority do not get habituated to it without an See also: exhibition of dislike which indicates See also: rebellion of the bowels
.
It is only when the teeth are on their way to the front, as shown by dribbling, that the parotid glands secrete an active saliva capable of digesting bread stuffs . Till then anything but milk must be given tentatively, and considered in theSee also: light of a means of education for its future mode of nutrition
.
The See also: time for weaning should be fixed partly by the See also: child's age, partly by the growth of the teeth
.
The first See also: group of teeth nine times out of ten consists of the See also: lower central front teeth, which may appear any time during the See also: sixth and seventh See also: month
.
The mother may then begin to diminish the number of suckling times; and by a month she can have reduced them to twice a See also: day, so as to be ready when the second group makes its way through the upper front gums to cut off the supply altogether
.
The third group, the lateral incisors and first grinders, usually after the first anniversary of See also: birth, give See also: notice that solid food can be chewed
.
But it is prudent to let See also: dairy milk See also: form a considerable portion of the fare till the See also: eye-teeth are cut, which seldom happens till the eighteenth or twentieth month
.
Childhood and Youth.—At this stage of life the diet must obviously be the best which is a transition from that of infancy to that of adult age
.
Growth is not completed, but yet entire surrender of every consideration to the claim of growth is not possible, nor indeed desirable
.
Moreover, that abundance of adipose tissue, or reserve new growth, which a baby can bear is an impediment to the due education of the muscles of the boy or girl
.
The supply of nutriment need not be so continuous as before, but at the same time should be more frequent than for
the adult
.
Up to at least fourteen or fifteen years of age the See also: rule should be four meals a day, varied indeed, but nearly equal in nutritive power and in quantity, that is to say, all moderate, all sufficient
.
The maturity the See also: body then reaches involves a hardening and enlargement of the bones and cartilages, and a strengthening of the See also: digestive See also: organs, which in healthy young persons enables us to dispense with some of the watchful care bestowed upon their diet
.
Three full meals a day are generally sufficient, and the requirements of See also: mental training may be allowed to a certain extent to modify the See also: attention to nutrition which has hitherto been paramount
.
Adults.—It is only necessary here to refer to the article on DIETETICS (see also See also: VEGETARIANISM) for a discussion of the food of normal adults; and to such headings as See also: DIETARY (for fixed allowances) or See also: COOKERY
.
Different See also: staple articles of food are dealt with under their own headings
.
For animals other than man see the respective article; on them
.
Among numerous books on the subject, in addition to those enumerated under DIETETICS, see See also: Sir See also: Henry
See also: Thompson's Foods and Feeding (1894); See also: Hart's Diet in Sickness and Health (1896); Knight, Food and its Functions (1895)
.
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