TWO:Epicurus was assuredly not a master of language, but had he meant all that is here put into his mouth, he would hardly have been at a loss for words to say it. Remembering that the Κ?ριαι δ?ξαι constituted a sort of creed drawn up by the master himself for his disciples to learn by heart,144 and that the incriminated passage is one of the articles in that creed, we need only look at the context to make certain that it has been entirely misread by his apologist.145 In the three preceding articles, we are told that justice is by nature a contract for the prevention of aggressions, that it does not exist among animals which are unable, nor among tribes of men which are either unable or unwilling to enter into such an agreement, andwith reiterated emphasisthat, apart from contracts, it has no original existence (o?κ ?ν τ? καθ ?αυτ? δικαιοσ?νη). There is nothing at all about a true as distinguished from a false justice; there is no allusion whatever to the theories of any contemporaries of Socrates; the polemic reference, if any, is to Plato, and to Plato alone. Then comes the declaration quoted above, to the effect that injustice is not an evil in itself, but only an evil through the dread of punishment which it produces. Now, by injustice, Epicurus must simply mean the opposite of what he defined justice to be in the preceding paragraphthat is, a breach of the agreement not to hurt one another (μ? βλ?πτειν ?λλ?λου?). The authority of the State is evidently conceived, not as superseding, but as enforcing agreements. The succeeding article still further confirms the view rejected by Mr. Wallace. Epicurus tells us that no man who stealthily evades the contract to abstain from mutual aggressions can be sure of escaping detection. This is72 evidently added to show that, apart from any mystical sanctions, fear of punishment is quite enough to deter a prudent man from committing crimes. And we can see that no other deterrent was recognised by Lucretius, when, in evident reference to his masters words, he mentions the fears of those who offendnot against mere conventional rules, but against human rights in generalas the great safeguard of justice.146Shaping machines as machine tools occupy a middle place between planing and slotting machines; their movements correspond more to those of slotting machines, while the operation of the tools is the same as in planing. Some of the advantages of shaping over planing machines for certain kinds of work are, because of the greater facilities afforded for presenting and holding small pieces, or those of irregular shape; the supports or tables having both vertical and horizontal faces to which pieces may be fastened, and the convenience of the mechanism for adjusting and feeding tools.
THREE:"And she's got a diamond star of mine worth a thousand pounds!" Lady Rockingham screamed. "A stone was missing, and she offered to have it replaced for me out of her stock of loose diamonds. I made a friend of that woman, a vulgar adventuress, who steals brooches and the like."
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FORE:It will be remembered that in an earlier section of this chapter we accompanied Plato to a period when he had provisionally adopted a theory in which the Protagorean contention that virtue can be taught was confirmed and explained by the Socratic contention that virtue is knowledge; while this knowledge again was interpreted in the sense of a hedonistic calculus, a prevision and comparison of the pleasures and pains consequent on our actions. We have now to trace the lines of thought by which he was guided to a different conception of ethical science.In multiplying the variations of a measuring implement by mechanism, it is obvious that movable joints must be employed; it is also obvious that no positive joint, whether cylindrical or flat, could be so accurately fitted as to transmit such slight movement as occurs in gauging or measuring. This difficulty is in most measuring instruments overcome by employing a principle not before alluded to, but common in many machines, that of elastic [151] compensation.
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FORE:A pair of spring calipers will illustrate this principle. The points are always steady, because the spring acting continually in one direction compensates the loose play that may be in the screw. In a train of tooth wheels there is always more or less play between the teeth; and unless the wheels always revolve in one direction, and have some constant resistance offered to their motion, 'backlash' or irregular movement will take place; but if there is some constant and uniform resistance such as a spring would impart, a train of wheels will transmit the slightest motion throughout.
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FORE:We have next the disposition of individuals, no longer to interfere in making the law, but to override it, or to bend it into an instrument for their own purposes. Doubtless there existed such a tendency in Platos time, and his polity was very largely designed to hold it in check. But such unprincipled ambition was nothing new in Greece, however the mode of its manifestations might vary. What had formerly been seized by armed violence was now sought after with the more subtle weapons of rhetorical skill; just as at the present moment, among these same Greeks, it is the prize of parliamentary intrigue. The Cretan and Spartan institutions may very possibly have been designed with a view to checking this spirit of selfish lawlessness, by reducing private interests to a minimum; and Plato most certainly had them in his mind when he pushed the same method still further; but those institutions were not types of Hellenism as a whole, they only represented one, and that a very abnormal, side of it. Plato borrowed some elements from this quarter, but, as we shall presently show, he incorporated them with others of a widely different character. Sparta was, indeed, on any high theory of government, not a State at all, but a robber-clan established among a plundered population whom they never tried or cared to conciliate. How little weight her rulers attributed to the interests of the State as such, was well exhibited during the Peloponnesian War, when political advantages of the utmost importance were surrendered in deference to the noble families whose kinsmen had been captured at Sphactria, and whose sole object was to rescue them from the fate with which they were threatened by the Athenians as a means of extorting concessions;conduct with which the refusal of Rome to ransom the soldiers who had surrendered at Cannae may be instructively contrasted.
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FORE:
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FORE:To exert a powerful force acting through but a short distance, percussive devices are much more effective and simple than those acting by maintained or direct pressure. A hammer-head may give a blow equal to many tons by its momentum, and absorb the reactive force which is equal to the blow; but if an equal force was to be exerted by screws, levers, or hydraulic apparatus, we can easily see that an abutment would be required to withstand the reactive force, and that such an abutment would require a strength perhaps beyond what ingenuity could devise.
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FORE:An apprentice may get a clear idea of this venting process by inspecting tubular core barrels, such as are employed in moulding pipes or hollow columns, or by examining ordinary cores about a foundry. Provision of some kind to 'carry off the vent,' as it is termed by moulders, will be found in every case. The venting of moulds is even more important than venting cores, because core vents only carry off gas generated within the core itself, while the gas from its exterior surface, and from the whole mould, has to find means of escaping rapidly from the flasks when the hot metal enters.
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