Inventions in machine improvement, no matter what their nature, must of course consist in and conform to certain fixed modes of operating, and no plan of urging the truth of a proposition is so common, even with a chance inventor, as to trace out the 'principles' which govern his discovery.
CHAPTER VMilling tools are employed at Crewe for roughing out the slots in locomotive crank axles. A number of detachable tools are mounted on a strong disc, so that four to six will act at one time; in this way the displacement exceeds what a lathe can perform when acting continuously with two tools. Rotary planing machines constructed on the milling principle, have been tried for plane surfaces, but with indifferent success, except for rough work.Hetty drank the mixture gratefully. The few kind words were soothing. If there was anything really wrong the Countess could not have behaved like that. Her head touched the pillow, something delicious and warm seemed to float over her, and she was sound asleep.
ONE:X.Expedients to avoid dirt in such castings as are to be finished all over or on two sides are various. Careful moulding to avoid loose sand and washing is the first requisite; sinking heads, that rise above the moulds, are commonly employed when castings are of a form which allows the dirt to collect at one point. Moulds for sinking heads are formed by moulders as a rule, but are sometimes provided for by the patterns.
DANIEL PRATT
TWO:For a long time the history of the Roman Empire was written by the descendants of its most deadly enemiesby Christian ecclesiastics or by scholars trained under their influence, and by the inheritors of the northern races who overran and destroyed it. The natural tendency of both classes was to paint the vices of the old society in the most glaring colours, that by so doing they might exhibit the virtues of its conquerors and the necessity of their mission in stronger relief. In this respect, their task was greatly facilitated by the character of the authorities from whom their information was principally derived. Horace and Petronius, Seneca and Juvenal, Tacitus and Suetonius, furnished them with pictures of depravity which it was impossible to exaggerate, which had even to be toned down before they could be reproduced in a modern language. No allowance was made for the influence of a rhetorical training in fostering the cultivation of effect at the expense of truth, nor for the influence of aristocratic prejudice in securing a ready acceptance for whatever tended to the discredit of a monarchical government. It was also forgotten that the court and society of Rome could give no idea of the life led in the rest of Italy and in the provinces. Moreover, the contrast continually instituted or implied by these historians was not between the ancient civilisation and the state of things which immediately succeeded it, nor yet between the society of a great capital as it was then, and as it was in the historians own time. The points selected for contrast were what was worst in Paganism and what is best in Christianity. The one was judged from the standpoint of courtiers and men of the world,197 embittered by disappointment and familiar with every form of depravity, the other was judged from the standpoint of experience acquired in a college quadrangle, a country parsonage, or a cathedral close. The modern writer knew little enough even about his own country, he knew next to nothing about what morality was in the Middle Ages, and nothing at all about what it still continues to be in modern Italy.
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ONE:She is that! Jeff agreed. Well, as Sandy must be reading, about where hes got in that letter, Mrs. Everdail, who goes in for society pretty strong, got a chance to be presented, this Spring, before the King and Queen of England at one of their receptions.It may safely be assumed that the prejudices once entertained against Epicureanism are now extinct. Whatever may have been the speculative opinions of its founder, he had as good a right to them as the Apostles had to theirs; nor did he stand further aloof from the popular religion of any age than Aristotle, who has generally been in high favour with theologians. His practical teaching was directed towards the constant inculcation of virtue; nor was it belied by the conduct either of himself or of his disciples, even judged by the standard of the schools to which they were most opposed. And some of his physical theories, once rejected as self-evidently absurd, are now proved to be in harmony with the sober conclusions of modern science. At any rate, it is not in this quarter, as our readers will doubtless have already perceived, that the old prejudices, if they still exist, are likely to find an echo. Just now, indeed, the danger is not that Epicurus should be depreciated, but that his merits should obtain far more than their proper meed of recognition. It seems to be forgotten that what was best in his physics he borrowed from others, and that what he added was of less than no value; that he was ignorant or careless of demonstrated truths; that his avowed principles of belief were inconsistent with any truth rising above the level of vulgar apprehension; and finally, that in his system scientific interests were utterly subordinated to practical interests.
THREE:It was at this juncture that the voluntary withdrawal of an older fellow-pupil placed Arcesilaus at the head of the Academy. The date of his accession is not given, but we are told that he died 241 or 240 B.C. in the seventy-fifth year of his age. He must, therefore, have flourished a generation later than Zeno and Epicurus. Accomplished, witty, and generous, his life is described by some as considerably less austere than that of the excellent nonentities whom he succeeded. Yet its general goodness was testified to by no less an authority than his contemporary, the noble Stoic, Cleanthes. Do not blame Arcesilaus, exclaimed the latter146 to an unfriendly critic; if he denies duty in his words, he affirms it in his deeds. You dont flatter me, observed Arcesilaus. It is flattering you, rejoined Cleanthes, to say that your actions belie your words.230 It might be inferred from this anecdote that the scepticism of the new teacher, like that of Carneades after him, was occasionally exercised on moral distinctions, which, as then defined and deduced, were assuredly open to very serious criticism. Even so, in following the conventional standard of the age, he would have been acting in perfect consistency with the principles of his school. But, as a matter of fact, his attacks seem to have been exclusively aimed at the Stoic criterion of certainty. We have touched on this difficult subject in a former chapter, but the present seems a more favourable opportunity for setting it forth in proper detail.
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THREE:Sandy and Dick, standing by the airplane on the beach, whirled to see a short, stoutish man in regulation flying togs come unexpectedly into view from behind an inshore hillock of sand.
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THREE:A few days later I had to go to Canne, a Belgian hamlet near the frontier, south of Maastricht. In the evening of August 18th an atrociously barbarous crime had been committed there, a cool-blooded murder. At Canne live some good, kind Flemings, who would not hurt a fly. The kind-hearted burgomaster had, moreover, tried for days to comfort his fellow-citizens, and was for ever saying:"Keep the doctor to yourself," Maitrank snapped. "I'm all right. See, there is nothing in any of my pockets. My overcoat could not----"
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THREE:He paused with a dazed expression as he produced from his big coat a handful of what looked like streaming fire. He gave a glad cry, the cry of a mother who has found some child that she deemed to be lost. He carried the stones to his lips and kissed them.Such are the closing words of what was possibly Aristotles last work, the clear confession of his monotheistic creed. A monotheistic creed, we have said, but one so unlike all other religions, that its nature has been continually misunderstood. While some have found in it a theology like that of the Jews or of Plato or of modern Europe, others have resolved it into a vague pantheism. Among the latter we are surprised to find Sir A. Grant, a writer to whom the Aristotelian texts must be perfectly familiar both in spirit and in letter. Yet nothing can possibly be more clear and emphatic than the declarations they contain. Pantheism identifies God with the world; Aristotle separates them as pure form from form more or less alloyed with matter. Pantheism denies personality to God; Aristotle gives him unity, spirituality, self-consciousness, and happiness. If these qualities do not collectively involve personality, we should like to know what does. Need we351 remind the accomplished editor of the Nicomachean Ethics how great a place is given in that work to human self-consciousness, to waking active thought as distinguished from mere slumbering faculties or unrealised possibilities of action? And what Aristotle regarded as essential to human perfection, he would regard as still more essential to divine perfection. Finally, the God of pantheism is a general idea; the God of Aristotle is an individual. Sir A. Grant says that he (or it) is the idea of Good.247 We doubt very much whether there is a single passage in the Metaphysics to sanction such an expression. Did it occur, however, that would be no warrant for approximating the Aristotelian to the Platonic theology, in presence of such a distinct declaration as that the First Mover is both conceptually and numerically one,248 coming after repeated repudiations of the Platonic attempt to isolate ideas from the particulars in which they are immersed. Then Sir A. Grant goes on to speak of the desire felt by Nature for God as being itself God,249 and therefore involving a belief in pantheism. Such a notion is not generally called pantheism, but hylozoism, the attribution of life to matter. We have no desire, however, to quarrel about words. The philosopher who believes in the existence of a vague consciousness, a spiritual effort towards something higher diffused through nature, may, if you will, be called a pantheist, but not unless this be the only divinity he recognises. The term is altogether misleading when applied to one who also proclaims the existence of something in his opinion far higher, better and more reala living God, who transcends Nature, and is independent of her, although she is not independent of him.
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"Our hostess has gone to rob a bank," the gentlemanly youth suggested.All these things constitute technical knowledge, and the privilege of their acquirement is an element of value. The common view taken of the matter, however, is that it costs nothing for a master to afford these privilegesthe work must at any rate be carried on, and is not retarded by being watched and learned by apprentices. Viewed from any point, the privileges [22] of engineering establishments have to be considered as an element of value, to be bought at a price, just as a ton of iron or a certain amount of labour is; and in a commercial sense, as an exchangeable equivalent for labour, material, or money. In return a master receives the unskilled labour or service of the learner; this service is presumed to be given at a reduced rate, or sometimes without compensation, for the privileges of the works and the instruction received.This failure of laws to regulate apprenticeship, which facts fully warrant us in assuming, is due in a large degree to the impossibility of applying general rules to special cases; it may be attributed to the same reasons which make it useless to fix values or the conditions of exchange by legislation. What is required is that the master, the apprentice, and the public should understand the true relations between themthe value of what is given and what is received on both sides. When this is understood, the whole matter will regulate itself without any interference on the part of the law.In the manufacture of machines, there are usually so many sizes and modifications, that drawings should assist and determine in a large degree the completeness of classification and record. Taking the manufacture of machine tools, for example: we cannot well say, each time they are to be spoken of, a thirty-six inch lathe without screw and gearing, a thirty-two inch lathe with screw and gearing, a forty-inch lathe triple geared or double geared, with a twenty or thirty foot frame, and so on. To avoid this it is necessary to assume symbols for machines of different classes, consisting generally of the letters of the alphabet, qualified by a single number as an exponent to designate capacity or different modifications. Assuming, in the case of engine lathes, A to be the symbol for lathes of all sizes, then those of different capacity and modification can be represented in the drawings and records as A1, A2, A3, A4, and so on, requiring but two characters to indicate a lathe of any kind. These symbols should be marked in large plain letters on the left-hand lower corner of sheets, so that the manager, workman, or any one else, can see at a glance what the [86] drawings relate to. This symbol should run through the time-book, cost account, sales record, and be the technical name for machines to which it applies; in this way machines will always be spoken of in the works by the name of their symbol.
"Our hostess has gone to rob a bank," the gentlemanly youth suggested.All these things constitute technical knowledge, and the privilege of their acquirement is an element of value. The common view taken of the matter, however, is that it costs nothing for a master to afford these privilegesthe work must at any rate be carried on, and is not retarded by being watched and learned by apprentices. Viewed from any point, the privileges [22] of engineering establishments have to be considered as an element of value, to be bought at a price, just as a ton of iron or a certain amount of labour is; and in a commercial sense, as an exchangeable equivalent for labour, material, or money. In return a master receives the unskilled labour or service of the learner; this service is presumed to be given at a reduced rate, or sometimes without compensation, for the privileges of the works and the instruction received.This failure of laws to regulate apprenticeship, which facts fully warrant us in assuming, is due in a large degree to the impossibility of applying general rules to special cases; it may be attributed to the same reasons which make it useless to fix values or the conditions of exchange by legislation. What is required is that the master, the apprentice, and the public should understand the true relations between themthe value of what is given and what is received on both sides. When this is understood, the whole matter will regulate itself without any interference on the part of the law.In the manufacture of machines, there are usually so many sizes and modifications, that drawings should assist and determine in a large degree the completeness of classification and record. Taking the manufacture of machine tools, for example: we cannot well say, each time they are to be spoken of, a thirty-six inch lathe without screw and gearing, a thirty-two inch lathe with screw and gearing, a forty-inch lathe triple geared or double geared, with a twenty or thirty foot frame, and so on. To avoid this it is necessary to assume symbols for machines of different classes, consisting generally of the letters of the alphabet, qualified by a single number as an exponent to designate capacity or different modifications. Assuming, in the case of engine lathes, A to be the symbol for lathes of all sizes, then those of different capacity and modification can be represented in the drawings and records as A1, A2, A3, A4, and so on, requiring but two characters to indicate a lathe of any kind. These symbols should be marked in large plain letters on the left-hand lower corner of sheets, so that the manager, workman, or any one else, can see at a glance what the [86] drawings relate to. This symbol should run through the time-book, cost account, sales record, and be the technical name for machines to which it applies; in this way machines will always be spoken of in the works by the name of their symbol.