TWO:This object is attained in planing machines by the friction of the belts, which not only cushions the platen like a spring, but in being shifted opposes a gradually increasing resistance until the momentum is overcome and the motion reversed. By multiplying the movement of the platen with levers or other mechanism, and by reason of the movement that is attained by momentum after the driving power ceases to act, it is found practicable to have a platen 'shift its own belts,' a result that would never have been reached by theoretical deductions, and was no doubt discovered by experiment, like the automatic movement of engine valves is said to have been.
日本化学機械製造は、国内外に豊富な実績を持つプラントエンジニアリングとものづくりのプロフェッショナル集団です。
設計?製造?建設?メンテナンスまで自社一貫で担い、
顧客企業様の課題を解決するベストパートナーであるために日々前進し続けています。
オンリーワンの技術を武器に、私たちと一緒にあらゆる分野のプラントエンジニアリングに挑戦してみませんか。
- THREE:The permanent contraction of steel in tempering is as the degree of hardness imparted to it by the bath.That Philos interpretation of Platonism ultimately reacted on Greek thought seems certain, but at what date his influence began to tell, and how far it reached, must remain undecided. Plutarch speaks of Gods purity and of his transcendent elevation above the universe in language closely resembling that of the Alexandrian Jew, with whose opinions he may have been indirectly acquainted.400 We have already seen how the daemons were employed to fill up the interval thus created, and what serious concessions to popular superstition the belief in their activity involved. Still Plutarch259 does not go so far as to say that the world was not created by God. This step was taken by Numenius, a philosopher who flourished about the middle of the second century, and who represents the complete identification of Platonism with Pythagoreanism, already mentioned as characteristic of the period following that date. Numenius is acquainted with Philos speculations, and accepts his derivation of Platonism from the Pentateuch. What, he asks, is Plato but a Moses writing in the Attic dialect?401 He also accepts the theory that the world was created by a single intermediate agent, whom, however, he credits with a much more distinct and independent personality than Philo could see his way to admitting. And he regards the human soul as a fallen spirit whose life on earth is the consequence of its own sinful desires. From such fancies there was but a single step to the more thorough-going dualism which looks on the material world as entirely evil, and as the creation of a blind or malevolent power. This step had already been taken by Gnosticism. The system so called summed up in itself, more completely, perhaps, than any other, all the convergent or conflicting ideas of the age. Greek mythology and Greek philosophy, Zoroastrianism, Judaism, and Christianity each contributed an element to the fantastic and complicated scheme propounded by its last great representative, Valentinus. This teacher pitches his conception of the supreme God even higher than Philo, and places him, like Platos absolute Good, outside the sphere of being. From himor itas from a bottomless gulf proceed a vast series of emanations ending in the Demiurgus or creator of the visible world, whose action is described, in language vividly recalling the speculations of certain modern metaphysicians, as an enormous blunder. For, according to Gnosticism, the world is not merely infected with evil by participation in a material principle, it is evil altogether, and a special intervention of260 the higher powers is needed in order to undo the work of its delirious author.402 Here we have a particular side of Platos philosophy exaggerated and distorted by contact with Zoroastrian dualism. In the Statesman there is a mythical description of two alternate cycles, in one of which the world is governed by a wise providence, while in the other things are abandoned to themselves, and move in a direction the reverse of that originally imposed on them. It is in the latter cycle that Plato supposes us to be moving at present.403 Again, after having been long content to explain the origin of evil by the resistance of inert matter to the informing power of ideal goodness, Plato goes a step further in his latest work, the Laws, and hazards the hypothesis of an evil soul actively counterworking the beneficent designs of God.404 And we find the same idea subsequently taken up by Plutarch, who sees in it the most efficient means for exonerating God from all share in the responsibility for physical disorder and moral wrong.405 But both master and disciple restricted the influence of their supposed evil soul within very narrow limits, and they would have repudiated with horror such a notion as that the whole visible world is a product of folly or of sin.
- THREE:So also with Aristotle. As a naturalist, he is, indeed, purely objective; but when he offers a general explanation of the world, the subjective element introduced by Protagoras and Socrates at once reappears. Simple absolute self-consciousness is for him the highest good, the animating principle of Nature, the most complete reality, and the only one that would remain, were the element of nonentity to disappear from this world. The utter misconception of dynamic phenomena which marks his physics and astronomy can only be accounted for by his desire to give life the priority over mechanical motion, and reason the priority over life. Thus his metaphysical method is essentially identical with the introspective method recommended by Plotinus, and, if fully worked out, might have led to the same results.
TWO:The man laughed silently, horribly, his body twisting as if set on wires.
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TWO:CHAPTER XXXVI. A FAINT CLUE.