THREE:There is nothing more interesting, or at the same time more useful, in the study of mechanics, than to analyse the action of cutting machines or other machinery of application, and to ascertain in examples that come under notice whether the main object of a machine is increased force, more accurate guidance, or greater speed than is attainable by hand operations. Cutting machines as explained may be directed to either of these objects singly, or to all of them together, or these objects may vary in their relative importance in different operations; but in all cases where machines are profitably employed, their action can be traced to one or more of the functions named.
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TWO:To the unskilled, or to those who do not take a comprehensive view of an engineering business as a whole, the finishing and fitting department seems to constitute the whole of machine manufacturean impression which a learner should guard against, because nothing but a true understanding of the importance and relations of the different divisions of an establishment can enable them to be thoroughly or easily learned.If a civil engineer is wanted to survey railways, construct docks, bridges, buildings, or permanent works of any kind, there are scores of men ready for the place, and qualified to discharge the duties; but if an engineer is wanted to design and construct machinery, such a person is not easy to be found, and if found, there remains that important question of competency; for the work is not like that of constructing permanent works, where several men may and will perform the undertaking very much in the same manner, and perhaps equally well. In the construction of machinery it is different; the success will be directly as the capacity of the engineer, who will have but few precedents, and still fewer principles, to guide him, and generally has to set out by relying mainly upon his special knowledge of the operation and application of such machines as he has to construct.
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ONE:The use of hand tools should be learned by employing them on every possible occasion. A great many of the modern improvements in engine lathes are only to evade hand tool work, and in many cases effect no saving except in skill. A latheman who is skilful with hand tools will, on many kinds of light work, perform more and do it better on a hand lathe than an engine lathe; there is always more or less that can be performed to advantage with hand tools even on the most elaborate engine lathes.
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TWO:She lay there waiting patiently. Soon it seemed to her that somebody was in the room. She could hear breathing that was not her own, and the creep, creep of drapery. There was a faint rattle on the stand where the medicine stood, so faint that it would not have been heard by any but strained ears.Socrates represents the popular Athenian character much as Richardson, in a different sphere, represents the English middle-class characterrepresents it, that is to say, elevated into transcendent genius. Except this elevation, there was nothing anomalous about him. If he was exclusively critical, rationalising, unadventurous, prosaic; in a word, as the German historians say, something of a Philistine; so, we may suspect, were the mass of his countrymen. His illustrations were taken from such plebeian employments as cattle-breeding, cobbling, weaving, and sailoring. These were his touches of things common which at last rose to touch the spheres. He both practised and inculcated virtues, the value of which is especially evident in humble lifefrugality and endurance. But he also represents the Dmos in its sovereign capacity as legislator and judge. Without aspiring to be an orator or statesman, he reserves the ultimate power of arbitration and election. He submits candidates for office to a severe scrutiny, and demands from all men an even stricter account of their lives than retiring magistrates had to give of their conduct, when in power, to the people. He applies the judicial method of cross-examination to the detection of error, and the parliamentary method of joint deliberation to the discovery of truth. He follows out the democratic principles of free speech and self-government, by submitting every question that arises to public discussion, and insisting on no conclusion that does not command the willing assent of his audience. Finally, his conversation, popular in form, was popular also in this respect, that everybody who chose to listen might have the130 benefit of it gratuitously. Here we have a great change from the scornful dogmatism of Heracleitus, and the virtually oligarchic exclusiveness of the teachers who demanded high fees for their instruction.
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