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    Software name: Appdown
    Software type: Microsoft Framwork

    Software size : 551 MB

    soft time:2021-01-24 22:52:49

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      � 謦ぅミ"How much is it, madame?"ぜぅ瞍Many clerical gentlemen connected with the University had been ill-treated in the most atrocious manner. The architect Lenertz, a native of Luxemburg, also connected with the University, had been shot, for no reason at all, before the eyes of his wife at the moment that he left the house. And Louvain was so effectively cut off from the outer world that in most convents I was asked whether the rumour was true that the Pope was dead! And at that time his successor had already been appointed.ゥ阌登铳

      The old man was allowed to go home, escorted by the same soldiers. At the very moment that he was about to leave, I happened to notice on the platform a gigantic heap of loaves, brought in by train for the soldiers.ゼぅ━妞ゥゥOne of the problems connected with the handling of material is to determine where hand-power should stop and motive-power begin—what conditions will justify the erection of cranes, hoists, or tramways, and what conditions will not. Frequent mistakes are made in the application of power when it is not required, especially for handling material; the too common tendency of the present day being to apply power to every purpose where it is possible, without estimating the actual saving that, may be effected. A common impression is that motive power, wherever applied to supplant hand labour in handling material, produces a gain; but in many cases the [66] fallacy of this will be apparent, when all the conditions are taken into account.ヘ尴ぅぜ"Are they tolerably kind?"Гぅぅ

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      "Ah well, you come from The Netherlands; tell me whether it is true that you have let the Germans through, allowing them to ravish us? Tell me whether this is true?"ゥイEven before that, on August 11th I sent a communication, by post or cable (De Tijd, No. 20353), in which the following is found:—违ゥSteam-hammers are divided into two classes—one having the valves moved by hand, and the other class with automatic valve movement.いノルぅよ妤

      �溢"Great German defeat at Libramont—nine thousand prisoners taken."イゥねずレよ�弗ゥぅイ cだ

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      The reader may notice how everything pertaining to patterns and moulding resolves itself into a matter of judgment on the part of workmen, and how difficult it would be to apply general rules.楗�拉浃イ

      After having murdered the burgomaster's wife, the villains attacked a guest, Mr. Derricks, a lawyer, and member of the Provincial States, whom they killed with a bayonet. His wife broke a leg when she tried to fly to the cellar.フ谄ぅ鞘怆The sudden and varied resistance to line shafts tends to loosen couplings, destroy gearing, and produce sudden strains that are unknown in other cases; and shafting arranged with the usual proportions for transmitting power will soon fail if applied to driving trip-hammers. Rigid connections or metal attachments ace impracticable, and a slipping belt arranged so as to have the tension varied at will is the usual and almost the only successful means of transmitting power to hammers. The motion of trip-hammers is a curious problem; a head and die weighing, together with the irons for attaching them, one hundred pounds, will, with a helve eight feet long, strike from two to three hundred blows a minute. This speed exceeds anything that could be attained by a direct reciprocal motion given to the hammer-head by a crank, and far exceeds any rate of speed that would be assumed from theoretical inference. The hammer-helve being of wood, is elastic, and acts like a vibrating spring, its vibrations keeping in unison with the speed of the tripping points. The whole machine, in fact, must be constructed upon a principle of elasticity throughout, and in this regard stands as an exception to almost every other known machine. The framing for supporting the trunnions, which one without experience would suppose should be very rigid and solid, is found to answer best when composed of timber, and still better when this timber is laid up in a manner that allows the structure to spring and [107] yield. Starting at the dies, and following back through the details of a trip-hammer to the driving power, the apprentice may note how many parts contribute to this principle of elasticity: First—the wooden helve, both in front of and behind the trunnion; next—the trunnion bar, which is usually a flat section mounted on pivot points; third—the elasticity of the framing called the 'husk,' and finally the frictional belt. This will convey an idea of the elasticity required in connecting the hammer-head with the driving power, a matter to be borne in mind, as it will be again referred to.み扦睽工亥薨2. The use that may be made of air after it has been applied as a motive agent.庐ぴ

      There is, however, a principle in hydraulic machinery that must be taken into account, in comparing it with positively geared mechanism, which often leads to loss of power that in many cases will overbalance any gain derived from the peculiar action of hydraulic apparatus. I allude to the loss of power incident to dealing with an inelastic medium, where the amount of force expended is constant, regardless of the resistance offered. A hydraulic crane, for instance, consumes power in proportion to its movements, and not as the amount of duty performed; it takes the same quantity of water to fill the cylinders of such cranes, whether the water exert much or little force in moving the pistons. The difference between employing elastic mediums like air and steam, and an inelastic medium like water, for transmitting force in performing irregular duty, has been already alluded to, and forms a very interesting study for a student in mechanics, leading, as it does, to the solution of many problems concerning the use and effect of power.ツい�キ丧キ濂びニThe time in which the contraction takes place is as the temperature of the bath and the cross section of the piece; in other words the heat passes off gradually from the surface to the centre.ぅ杠

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      If a cutting movement were performed by the tool supports, it would necessarily follow that the larger a piece to be planed, and the greater the distance from the platen to the cutting point, the farther a tool must be from its supports; a reversal of the conditions required; because the heavier the work the greater the cutting strain will be, and the tool supports less able to withstand the strains to be resisted.セ馥扁ゥ饯A drilling machine, adapted to the usual requirements of a machine fitting establishment, consists essentially of a spindle arranged to be driven at various speeds, with a movement for feeding the drills; a firm table set at right angles to the spindle, and arranged with a vertical adjustment to or from the spindle, and a compound adjustment in a horizontal plane. The simplicity of the mechanism required to operate drilling tools is such that it has permitted various modifications, such as column drills, radial drills, suspended drills, horizontal drills, bracket drills, multiple drills, and others.ヲめ┢"I acquaint the inhabitants of Liège of this, that they may understand what fate threatens them if they should assume a similar attitude.いぅ冥

      CHAPTER XXII. PATTERN-MAKING AND CASTING.イビ栩い"Why not?"荬ゥい螗这Group after group went by, and I heard French and Netherland, the Maastricht vernacular and sweet Flemish spoken, all sorts of tongues and modes of utterance. The men were bare-headed, and each let his rosary slip through his fingers. Soon after the head of the procession reached Our Lady Square the huge church was packed, and those who could not find room inside stood in the square, which also very soon was full with these thousands of people in a dense mass, like so many blades of grass in a meadow.佶撺イúい颏


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