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Webster's dictionary considerably over a hundred thousand); when we take these considerations into account, it would seem that a parent, on finding that a letter written by his daughter, twelve or fourteen years of age, has all but three or four words spelled right, ought to be pleased and satisfied, and to express his satisfaction for the encouragement of the learner, instead of appearing to think only of the few words that are wrong, and disheartening and discouraging the child by attempts to make her ashamed of her spelling.

The case is substantially the same with the enormous difficulties to be encountered in learning to read and to write. The names of the letters, as the child pronounces them individually, give very little clue to the sound that is to be given to the word formed by them. Thus, the letters h i t, as the child pronounces them individually—aitch, eye, tee—would naturally spell to him some such word as achite, not hit at all. And as for the labor and difficulty of writing, a mother who is impatient at the slow progress of her children in the attainment of the art would be aided very much in obtaining a just idea of the difficulties which they experience by sitting upon a chair and at a table both much too high for her, and trying to copy Chinese characters by means of a hair-pencil, and with her left hand—the work to be closely inspected every day by a stern Chinaman of whom she stands in awe, and all the minutest deviations from the copy pointed out to her attention with an air of dissatisfaction and reproval!

Effect of Ridicule.

There is, perhaps, no one cause which exerts a greater influence in chilling the interest that children naturally feel in the acquisition of knowledge, than the depression and discouragement which result from having their mistakes and errors—for a large portion of which they are in no sense to blame—made subjects of censure or ridicule. The effect is still more decided in the case of girls than in that of boys, the gentler sex being naturally so much more sensitive. I have found in many cases, especially in respect to girls who are far enough advanced to have had a tolerably full experience of the usual influences of schools, that the fear of making mistakes, and of being "thought stupid," has had more effect in hindering and retarding progress, by repressing the natural ardor of the pupil, and destroying all alacrity and courage in the efforts to advance, than all other causes combined.

Stupidity.

How ungenerous, and even cruel, it is to reproach or ridicule a child for stupidity, is evident when we reflect that any supposed inferiority in his mental organization can not, by any possibility, be his fault. The question what degree of natural intelligence he shall be endowed with, in comparison with other children, is determined, not by himself, but by his Creator, and depends, probably, upon conditions of organization in his cerebral system as much beyond his control as any thing abnormal in the features of his face, or blindness, or deafness, or any other physical disadvantage. The child who shows any indications of inferiority to others in any of these respects should be the object of his parent's or his teacher's special tenderness and care. If he is near-sighted, give him, at school, a seat as convenient as possible to the blackboard or the map. If he is hard of hearing, place him near the teacher; and for reasons precisely analogous, if you suspect him to be of inferior capacity, help him gently and tenderly in every possible way. Do every thing in your power to encourage him, and to conceal his deficiencies both from others and from himself, so far as these objects can be attained consistently with the general good of the family or of the school.

And, at all events, let those who have in any way the charge of children keep the distinction well defined in their minds between the faults which result from evil intentions, or deliberate and willful neglect of known duty, and those which, whatever the inconvenience they may occasion, are in part or in whole the results of mental or physical immaturity. In all our dealings, whether with plants, or animals, or with the human soul, we ought, in our training, to act very gently in respect to all that pertains to the embryo condition.

CHAPTER XIV. THE ACTIVITY OF CHILDREN.

In order rightly to understand the true nature of that extraordinary activity which is so noticeable in all children that are in a state of health, so as to be able to deal with it on the right principles and in a proper manner, it is necessary to turn our attention somewhat carefully to certain scientific truths in respect to the nature and action of force in general which are now abundantly established, and which throw great light on the true character of that peculiar form of it which is so characteristic of childhood, and is, indeed, so abundantly developed by the vital functions of almost all young animals. One of the fundamental principles of this system of scientific truth is that which is called the persistence of force.

The Persistence of Force.

By the persistence of force is meant the principle—one now established with so much certainty as to command the assent of every thinking man who examines the subject—that in the ordinary course of nature no force is either ever originated or ever destroyed, but only changed in form. In other words, that all existing forces are but the continuation or prolongation of other forces preceding them, either of the same or other forms, but precisely equivalent in amount; and that no force can terminate its action in any other way than by being transmuted into some other force, either of the same or of some other form; but still, again, precisely equivalent in amount.

It was formerly believed that a force might under certain circumstances be originated—created, as it were—and hence the attempts to contrive machines for perpetual motion—that is, machines for the production of force. This idea is now wholly renounced by all well-informed men as utterly impossible in the nature of things. All that human mechanism can do is to provide modes for using advantageously a force previously existing, without the possibility of either increasing or diminishing it. No existing force can be destroyed. The only changes possible are changes of direction, changes in the relation of intensity to quantity, and changes of form.

The cases in which a force is apparently increased or diminished, as well as those in which it seems to disappear, are all found, on examination, to be illusive. For example, the apparent increase of a man's power by the use of a lever is really no increase at all. It is true that, by pressing upon the outer arm with his own weight, he can cause the much greater weight of the stone to rise; but then it will rise only a very little way in comparison with the distance through which his own weight descends. His own weight must, in fact, descend through a distance as much greater than that by which the stone ascends, as the weight of the stone is greater than his weight. In other words, so far as the balance of the forces is concerned, the whole amount of the downward motion consists of the smaller weight descending through a greater distance, which will be equal to the whole amount of that of the larger one ascending through a smaller distance; and, to produce a preponderance, the whole amount of the downward force must be somewhat greater. Thus the lever only gathers or concentrates force, as it were, but does not at all increase it.

It is so with all the other contrivances for managing force for the accomplishment of particular purposes. None of them, increase the force, but only alter its form and character, with a view to its better adaptation to the purpose in view.

Nor can any force be extinguished. When a bullet strikes against a solid wall, the force of its movement, which seems to disappear, is not lost; it is converted into heat—the temperature of both the bullet and of that part of the wall on which it impinges being raised by the concussion. And it is found that the amount of the heat which is thus produced is always in exact proportion to the quantity of mechanical motion which is stopped; this quantity depending on the weight of the bullet, and on the velocity with which it was moving. And it has been ascertained, moreover, by the most careful, patient, and many times repeated experiments and calculations, that the quantity of this heat is exactly the same with that which, through the medium of steam, or by any other mode of applying it, may be made to produce the same quantity of mechanical motion that was extinguished in the bullet. Thus the force was not destroyed, but only converted into another form.

And if we should follow out the natural effects of this heat into which the motion of the bullet was transferred, we should find it rarefying the air around the place of concussion, and thus lifting the whole mass of the atmosphere above it, and producing currents of the nature of wind, and through these producing other effects, thus going on forever; the force changing its form, but neither increasing or diminishing its quantity through a series of changes without end.

The Arrest and temporary Reservation of Force.

Now, although it is thus impossible that any force should be destroyed, or in any way cease to exist in one form without setting in action a precisely equal amount in some other form, it may, as it were, pass into a condition of restraint, and remain thus suspended and latent for an indefinite period—ready, however, to break into action again the moment that the restraint is removed. Thus a perfectly elastic spring may be bent by a certain force, and retained in the bent position a long time. But the moment that it is released it will unbend itself, exercising in so doing precisely the degree of force expended in bending it. In the same manner air may be compressed in an air-gun, and held thus, with the force, as it were, imprisoned, for any length of time, until at last, when the detent is released by the trigger, the elastic force comes into action, exercising in its action a power precisely the same as that with which it was compressed.

Force or power may be thus, as it were, stored up in a countless variety of ways, and reserved for future action; and, when finally released, the whole amount may be set free at once, so as to expend itself in a single impulse, as in case of the arrow or the bullet; or it may be partially restrained, so as to expend itself gradually, as in the case of a clock or watch. In either case the total amount expended will be precisely the same—namely, the exact equivalent of that which was placed in store.

Vegetable and Animal Life.

There are a vast number of mechanical contrivances in use among men for thus putting force in store, as it were, and then using it more or less gradually, as may be required. And nature, moreover, does this on a scale so stupendous as to render all human contrivances for this purpose utterly insignificant in comparison. The great agent which nature employs in this work is vegetation. Indeed, it may truly be said that the great function of vegetable life, in all the infinitude of forms and characters which it assumes, is to receive and store up force derived from the emanations of the sun.

Animal life, on the other hand, exists and fulfills its functions by the expenditure of this force. Animals receive vegetable productions containing these reserves of force into their systems, which systems contain arrangements for liberating the force, and employing it for the purposes it is intended to subserve in the animal economy.

The manner in which these processes are performed is in general terms as follows: The vegetable absorbs from the earth and from the air substances existing in their natural condition—that is, united according to their strongest affinities. These substances are chiefly water, containing various mineral salts in solution, from the ground, and carbonic acid from the air. These substances, after undergoing certain changes in the vessels of the plant, are exposed to the influence of the rays of the sun in the leaves. By the power of these rays—including the calorific, the luminous, and the actinic—the natural affinities by which the above-mentioned substances were united are overcome, and they are formed into

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