Practical Education. Maria Edgeworth

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СКАЧАТЬ 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 to many of the operations of the young philosopher; nor is it reasonable that his experiments should interfere with the necessary regularity of a well ordered family. But most well ordered families allow their horses and their dogs to have houses to themselves; cannot one room be allotted to the children of the family? If they are to learn chemistry, mineralogy, botany, or mechanics; if they are to take sufficient bodily exercise without tormenting the whole family with noise, a room should be provided for them. We mention exercise and noise in particular, because we think they will, to many, appear of the most importance.

      To direct children in their choice of fossils, and to give them some idea of the general arrangements of mineralogy, toy-shops should be provided with specimens of ores, &c. properly labelled and arranged, in drawers, so that they may be kept in order. Children should have empty shelves in their cabinets, to be filled with their own collections; they will then know how to direct their researches, and how to dispose of their treasures. If they have proper places to keep things in, they will acquire a taste for order by the best means, by feeling the use of it: to either sex, this taste will be highly advantageous. Children who are active and industrious, and who have a taste for natural history, often collect, with much enthusiasm, a variety of pebbles and common stones, which they value as great curiosities, till some surly mineralogist happens to see them, and condemns them all with one supercilious "pshaw!" or else a journey is to be taken, and there is no way in making up the heterogeneous, cumbersome collection, which must, of course, be abandoned. Nay, if no journey is to be taken, a visitor, perhaps, comes unexpectedly; the little naturalist's apartment must be vacated on a few minutes notice, and the labour of years falls a sacrifice, in an instant, to the housemaid's undistinguishing broom.

      It may seem trifling to insist so much upon such slight things, but, in fact, nothing can be done in education without attention to minute circumstances. Many who have genius to sketch large plans, have seldom patience to attend to the detail which is necessary for their accomplishment. This is a useful, and therefore, no humiliating drudgery.

      With the little cabinets, which we have mentioned, should be sold cheap microscopes, which will unfold a world of new delights to children; and it is very probable that children will not only be entertained with looking at objects through a microscope, but they will consider the nature of the magnifying glass. They should not be rebuffed with the answer, "Oh, it's only a common magnifying glass," but they should be encouraged in their laudable curiosity; they may easily be led to try slight experiments in optics, which will, at least, give the habits of observation and attention. In Dr. Priestley's History of Vision, many experiments may be found, which are not above the comprehension of children of ten or eleven years old; we do not imagine that any science can be taught by desultory experiments, but we think that a taste for science may early be given by making it entertaining, and by exciting young people to exercise their reasoning and inventive faculties upon every object which surrounds them. We may point out that great discoveries have often been made by attention to slight circumstances. The blowing of soap bubbles, as it was first performed as a scientific experiment by the celebrated Dr. Hook, before the Royal Society, makes a conspicuous figure in Dr. Priestley's chapter on the reflection of light; this may be read to children, and they will be pleased when they observe that what at first appeared only a trifling amusement, has occupied the understanding, and excited the admiration, of some great philosophers.

      Every child observes the colours which are to be seen in panes of glass windows: in Priestley's History of Vision, there are some experiments of Hook's and Lord Brereton's upon these colours, which may be selected. Buffon's observations upon blue and green shadows, are to be found in the same work, and they are very entertaining. In Dr. Franklin's letters, there are numerous experiments, which are particularly suited to young people; especially, as in every instance he speaks with that candour and openness to conviction, and with that patient desire to discover truth, which we should wish our pupils to admire and imitate.

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