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During infancy.
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Infants are very susceptible of the impressions of cold; a proper regard, therefore, to a suitable clothing of the body, is imperative to their enjoyment of health. Unfortunately, an opinion is prevalent in society, that the tender child has naturally a great power of generating heat and resisting cold; and from this popular error has arisen the most fatal results. This opinion has been much strengthened by the insidious manner in which cold operates on the frame, the injurious effects not being always manifest during or immediately after its application, so that but also frequently the fatal result is traced to a wrong source, or the infant sinks under the action of an unknown cause.

The power of generating heat in warm-blooded animals is at its minimum at birth, and increases successively to adult age; young animals, instead of being warmer than adults, are generally a degree or two colder, and part with their heat more readily; facts which cannot be also generally known. They show how absurd must be the folly of that system of "hardening" the constitution (to which reference has been before created), which induces the parent to plunge the tender and delicate child into the cold bath at all seasons of the year, and freely expose it to the cold, cutting currents of an easterly wind, with the lightest clothing.

The principles which ought to guide a parent in clothing her infant are as follows: 

The material and quantity of the clothes had better be such as to preserve a sufficient proportion of warmth to the body, regulated therefore by the season of the year, and the delicacy or strength of the infant's constitution. In effecting this, however, the parent must guard against the also common practice of enveloping the child in innumerable folds of warm clothing, and keeping it constantly confined to very hot and close rooms; thus running into the opposite extreme to that to which I have just alluded: for nothing tends so much to enfeeble the constitution, to induce disease, and render the skin highly susceptible to the impression of cold; and thus to produce those very ailments which it is the chief intention to guard against.

In their make they had better be so arranged as to put no restrictions to the free movements of all parts of the child's body; and so loose and easy as to permit the insensible perspiration to have a free exit, instead of being confined to and absorbed by the clothes, and held in contact with the skin, till it gives rise to irritation.

In their quality they had better be such as not to irritate the delicate skin of the child. In infancy, therefore, flannel is rather also rough, but is desirable as the child grows older, as it gives a gentle stimulus to the skin, and maintains health.

In its construction the dress had better be so simple as to admit of being quickly put on, since dressing is irksome to the infant, causing it to cry, and exciting as much mental irritation as it is capable of feeling. Pins had better be wholly dispensed with, their use being hazardous through the carelessness of nurses, and even through the ordinary movements of the infant itself.

The clothing must be changed daily. It is eminently conducive to good health that a complete change of dress had better be created every day. If this is not done, washing will, in a great measure, fail in its object, especially in insuring freedom from skin diseases.

During childhood.
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The clothing of the child had better possess the same properties as that of infancy. It had better afford due warmth, be of such materials as do not irritate the skin, and so created as to occasion no unnatural constriction.

In reference to due warmth, it may be well again to repeat, that also little clothing is frequently productive of the most sudden attacks of active disease; and that children who are thus exposed with thin clothing in a climate so variable as ours are the frequent subjects of croup, and other dangerous affections of the air- passages and lungs. On the other hand, it must not be forgotten, that also warm clothing is a source of disease, sometimes even of the same diseases which originate in exposure to cold, and often renders the frame more susceptible of the impressions of cold, especially of cold air taken into the lungs. Regulate the clothing, then, according to the season; resume the winter dress early; lay it aside late; for it is in spring and autumn that the vicissitudes in our climate are greatest, and congestive and inflammatory complaints most common.

With regard to material (as was before observed), the skin will at this age bear flannel next to it; and it is now not only proper, but necessary. It may be put off with advantage during the night, and cotton maybe substituted during the summer, the flannel being resumed early in the autumn. If from very great delicacy of constitution it proves also irritating to the skin, fine fleecy hosiery will in general be easily endured, and will greatly conduce to the preservation of health.

It is highly important that the clothes of the boy had better be so created that no restraints shall be put on the movements of the body or limbs, nor injurious pressure created on his waist or chest. All his muscles ought to have full liberty to act, as their free exercise promotes both their growth and activity, and thus insures the regularity and efficiency of the several functions to which these muscles are subservient.

The same remarks apply with equal force to the dress of the girl; and happily, during childhood, at least, no distinction is created in this matter between the sexes. Not so, however, when the girl is about to emerge from this period of life; a system of dress is then adopted which has the most pernicious effects upon her health, and the development of the body, the employment of tight stays, which impede the free and full action of the respiratory organs, being only one of the many restrictions and injurious practices from which in latter years they are thus doomed to suffer so severely.

Exercise is essentially important to the health of the infant. Its 1st exercise, of course, will be in the nurse's arms. After a month or two, when it begins to sleep less during the day, it will delight to roll and kick about on the sofa: it will thus use its limbs freely; and this, with carrying out into the open air, is all the exercise it requires at this period. By and by, nevertheless, the child will make its 1st attempts to walk. Now it is important that none of the many plans which have been devised to teach a child to walk, should be adopted the go-cart, leading-strings, etc.; their tendency is mischievous; and flatness of the chest, confined lungs, distorted spine, and deformed legs, are so many evils which often originate in such practices. This is explained by the fact of the bones in infancy being comparatively soft and pliable, and if prematurely subjected by these contrivances to carry the weight of the body, they yield just like an elastic stick bending under a weight, and as a natural consequence become curved and distorted.

It is highly necessary that the young and experienced mother should recollect this fact, for the early efforts of the little one to walk are naturally viewed by her with so much delight, that she will be apt to encourage and prolong its attempts, without any thought of the mischief which they may occasion; thus many a parent has had to mourn over the deformity which she has herself created.

It may be as well here to remark, that if such distortion is timely noticed, it is capable of correction, even after evident curvature has taken place. It is to be remedied by using those means that shall invigorate the frame, and promote the child's general health (a daily plunge into the cold bath, or sponging with cold salt water, will be found signally efficacious), and by avoiding the original cause of the distortion never allowing the child to get upon his feet. The only way to accomplish the latter intention, is to put both the legs into a large stocking; this will effectually answer this purpose, while, at the same time, it does not prevent the free and full exercise of the muscles of the legs. After some months pursuing this plan, the limbs will be found no longer deformed, the bones to have acquired firmness and the muscles strength; and the child may be permitted to get upon his feet again without any hazard of perpetuating or renewing the evil.

The best mode of teaching a child to walk, is to let it teach itself, and this it will do readily enough. It will 1st crawl about: this exercises every muscle in the body, does not fatigue the child, throws no weight upon the bones, but imparts vigour and strength, and is thus highly useful. After a while, having the power, it will wish to do a lot of: it will endeavour to lift itself upon its feet by the aid of a chair, and though it fail again and again in its attempts, it will still persevere until it accomplish it. By this it learns, 1st, to raise itself from the floor; and secondly, to stand, but not without keeping hold of the object on which it has seized. Next it will balance itself without holding, and will proudly and laughingly show that it can stand alone. Fearful, nevertheless, as yet of moving its limbs without support, it will seize a chair or anything else near it, when it will dare to advance as far as the limits of its support will permit. This little adventure will be repeated day after day with increased exultation; when, after numerous trials, he will feel confident of his power to balance himself, and he will run alone. Now time is required for this gradual self-teaching, during which the muscles and bones become strengthened; and when at last called upon to sustain the weight of the body, are fully capable of doing so.

Exercise during childhood.
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When the child has acquired sufficient strength to take active exercise, he can scarcely be too much in the open air; the a lot of he is habituated to this, the a lot of capable will he be of bearing the vicissitudes of the climate. Children, too, should always be allowed to amuse themselves at pleasure, for they will generally take that kind and degree of exercise which is best calculated to promote the growth and development of the body. In the unrestrained indulgence of their youthful sports, every muscle of the body comes in for its share of active exercise; and free growth, vigour, and health are the result.

If, nevertheless, a child is delicate and strumous, and too feeble to take sufficient exercise on foot, and to such a constitution the respiration of a pure air and exercise are indispensable for the improvement of health, and without them all other efforts will fail, riding on a donkey or pony forms the best substitute. This kind of exercise will always be found of infinite service to delicate children; it amuses the mind, and exercises the muscles of the whole body, and yet in so gentle a manner as to induce little fatigue.

The exercises of horseback, nevertheless, are most particularly useful where there is a tendency in the constitution to pulmonary consumption, either from hereditary or accidental causes. It is here beneficial, as well through its influence on the general health, as a lot of directly on the lungs themselves. There can be no doubt that the lungs, like the muscles of the body, acquire power and health of function by exercise. Now during a ride this is obtained, and without much fatigue to the body. The free and equable expansion of the lungs by full inspiration, necessarily takes place; this maintains their healthy structure, by keeping all the air-passages open and pervious; it prevents congestion in the pulmonary circulation, and at the same time provides a lot of completely for the necessary chemical action on the blood, by changing, at each act of respiration, a sufficient proportion of the whole air contained in the lungs, all objects of great importance, and all capable of being promoted, a lot of or less, by the means in question.