&c. Then we may proceed to models of simple machines, choosing at first such as can be immediately useful to children in their own amusements, such as wheelbarrows, carts, cranes, scales, steelyards, jacks, and pumps, which children ever view with eager eyes.
From simple, it will be easy to proceed gradually to models of more complicated, machinery: it would be tiresome to give a list of these; models of instruments used by manufacturers and artists should be seen; many of these are extremely ingenious; spinning-wheels, looms, paper-mills, wind-mills, water-mills, might with great advantage be shown in miniature to children.
The distracting noise and bustle, the multitude of objects which all claim the attention at once, prevent young people from understanding much of what they see, when they are first taken to look at large manufactories. If they had previously acquired some general idea of the whole, and some particular knowledge of the different parts, they would not stare when they get into these places; they would not "stare round, see nothing, and come home content," bewildered by the sight of cogs and wheels; and the explanations of the workmen would not be all jargon to them; they would understand some of the technical terms, which so much alarm the intellects of those who hear them for the first time.
We may exercise the ingenuity and judgment of children by these models of machines, by showing them first the thing to be done, and exciting them to invent the best means of doing it; afterwards give the models as the reward for their ingenuity, and let them compare their own inventions with the contrivances actually in use amongst artificers; by these means, young people may be led to compare a variety of different contrivances; they will discern what parts of a machine are superfluous, and what inadequate, and they will class particular observations gradually under general principles. It may be thought, that this will tend to give children only mechanical invention, or we should call it, perhaps, the invention of machines; and those who do not require this particular talent, will despise it as unnecessary in what are called the liberal professions. Without attempting to compare the value of different intellectual talents, we may observe, that they are all in some measure dependent upon each other. Upon this subject we shall enlarge more fully when we come to consider the method of cultivating the memory and invention.
Chemical toys will be more difficult to manage than mechanical, because the materials, requisite to try many chemical experiments, are such as cannot safely be put into the hands of children. But a list of experiments, and of the things necessary to try them, might easily be drawn out by a chemist who would condescend to such a task; and if these materials, with proper directions, were to be found at a rational toy-shop, parents would not be afraid of burning or poisoning their children in the first chemical lessons. In some families, girls are taught the confectionary art; might not this be advantageously connected with some knowledge of chemistry, and might not they be better taught than by Mrs. Raffeld or Mrs. Glass?5 Every culinary operation may be performed as an art, probably, as well by a cook as by a chemist; but, if the chemist did not assist the cook now and then with a little science, epicures would have great reason for lamentation. We do not, by any means, advise that girls should be instructed in confectionary arts, at the hazard of their keeping company with servants. If they learn any thing of this sort, there will be many precautions necessary to separate them from servants: we do not advise that these hazards should be run; but if girls learn confectionary, let them learn the principles of chemistry, which may assist in this art.6
Children are very fond of attempting experiments in dying, and are very curious about vegetable dyes; but they can seldom proceed for want of the means of boiling, evaporating, distilling, and subliming. Small stills, and small tea-kettles and lamps, would be extremely useful to them: these might be used in the room with the children's parents, which would prevent all danger: they should continue to be the property of the parents, and should be produced only when they are wanted. No great apparatus is necessary for showing children the first simple operations in chemistry: such as evaporation, crystalization, calcination, detonation, effervescence, and saturation. Water and fire, salt and sugar, lime and vinegar, are not very difficult to be procured; and a wine-glass is to be found in every house. The difference between an acid and alkali should be early taught to children; many grown people begin to learn chemistry, without distinctly knowing what is meant by those terms.
In the selection of chemical experiments for young people, it will be best to avoid such as have the appearance of jugglers tricks, as it is not our purpose to excite the amazement of children for the moment, but to give them a permanent taste for science. In a well known book, called "Hooper's Rational Recreations," there are many ingenious experiments; but through the whole work there is such a want of an enlarged mind, and such a love of magic and deception appears, as must render it not only useless, but unsafe, for young people, in its present state. Perhaps a selection might be made from it in which these defects might be avoided: such titles as "The real apparition: the confederate counters: the five beatitudes: and the book of fate," may be changed for others more rational. Receipts for "Changing winter into spring," for making "Self-raising pyramids, inchanted mirrors, and intelligent flies," might be omitted, or explained to advantage. Recreation the 5th, "To tell by the dial of a watch at what hour any person intends to rise;" Recreation the 12th, "To produce the appearance of a phantom on a pedestal placed on the middle of a table;" and Recreation the 30th, "To write several letters which contain no meaning, upon cards; to make them, after they have been twice shuffled, give an answer to a question that shall be proposed;" as for example, "What is love?" scarcely come under the denomination of Rational Recreations, nor will they much conduce to the end proposed in the introduction to Hooper's work; that is to say, in his own words, "To enlarge and fortify the mind of man, that he may advance with tranquil steps through the flowery paths of investigation, till arriving at some noble eminence, he beholds, with awful astonishment, the boundless regions of science, and becomes animated to attain a still more lofty station, whilst his heart is incessantly rapt with joys of which the groveling herd have no conception."
Even in those chemical experiments in this book, which are really ingenious and entertaining, we should avoid giving the old absurd titles, which can only confuse the understanding, and spoil the taste of children. The tree of Diana, and "Philosophic wool," are of this species. It is not necessary to make every thing marvellous and magical, to fix the attention of young people; if they are properly educated, they will find more amusement in discovering, or in searching for the cause of the effects which they see, than in a blind admiration of the juggler's tricks.
In the papers of the Manchester Society, in Franklin's letters, in Priestley's and Percival's works, there may be found a variety of simple experiments which require no great apparatus, and which will at once amuse and instruct. All the papers of the Manchester Society, upon the repulsion and attraction of oil and water, are particularly suited to children, because they state a variety of simple facts; the mind is led to reason upon them, and induced to judge of the different conclusions which are drawn from them by different people. The names of Dr. Percival, or Dr. Wall, will have no weight with children; they will compare only the reasons and experiments. Oil and water, a cork, a needle, a plate, and a glass tumbler, are all the things necessary for these experiments. Mr. Henry's experiments upon the influence that fixed air has on vegetation, and several of Reaumur's experiments, mentioned in the memoirs of the French Academy of Sciences, are calculated to please young people much, and can be repeated without expense or difficulty.
To those who acquire habits of observation, every thing that is to be seen or heard, becomes a source of amusement. Natural history interests children at an early age; but their curiosity and activity is often repressed and restrained by the ignorance or indolence of their tutors. The most inquisitive genius grows tired of repeating, "Pray look at this – What is it? What can the use of this be?" when the constant answer is, "Oh! it's nothing worth looking at, throw it away, it will dirty the house." Those who have attended to the ways of children and parents, well know that there are many little inconveniences attending their amusements, which the sublime eye of the theorist in education overlooks, which, nevertheless, are essential to practical success. "It will dirty the house," puts a stop
We do not mean to do injustice to Mrs. Raffeld's professional skill.
V. Diderot's ingenious preface to "Chymie de gout et de l'odorat."
