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ENGLISH 波多野结衣与三男大战阳台CHAPTER XI. SHAFTS FOR TRANSMITTING POWER.As I felt myself one with the population, I uncovered my head and enthusiastically joined in the cry: "Au revoir! Au revoir!"In every quarter I met Belgian refugees from the south, and Netherlanders who wanted to escape to their safe native country. The Lige people themselves were not allowed to leave.

There was still a real reign of terror, and constantly the town-crier's bell was heard in the streets, informing the people that the victors required something or other. Only a few days ago it was announced that all bicycles had to be delivered at the bridge within twenty-four hours. Any person who after that time was found in possession of such a vehicle would be shot, and his house burned down. With similar threats all arms were requisitioned, but with the explicit addition that this referred also to old, and broken arms, or those which had been taken to pieces. Eatables and drinkables were also constantly claimed under threats of arson.Other soldiers kept on running into the burning houses, carrying out vases, pictures, plate, or small pieces of furniture. They smashed everything on81 the cobbles and then returned to wreck more things that would have been destroyed by the fire all the same. It was a revelry of drunken vandalism. They seemed mad, and even risked being burned alive at this work of destruction. Most of the officers were also tipsy; not one of them was saluted by the soldiers.

(1.) Why is the effect produced different on the top and bottom of a piece when struck by a hammer?(2.) Why does not a compound hammer create jar and concussion?(3.) What would be a mechanical difficulty in presenting the material to such hammers?(4.) Which is most important, speed or weight, in the effect produced on the under side of pieces, when struck by single acting hammers?"Come now quietly," I said; "so much the sooner you will be back with your laddie."

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The prevailing custom of casting machine frames in one piece, or in as few pieces as possible, leads to a great deal of bar-boring, most of which can be performed accurately enough by boring bars supported in and fed through bearings. By setting up temporary bearings to support boring-bars, and improvising means of driving and feeding, most of the boring on machine frames can be performed on floors or sole plates and independent of boring machines and lathes. There are but few cases in which the importance of studying the principles of tool action is more clearly demonstrated than in this matter of boring; even long practical experience seldom leads to a thorough understanding of the [139] various problems which it involves.After a few encouraging words I walked on along the solitary, deserted road, leaving the canal on the right, until a by-way took me to the bank of the Meuse, opposite the Netherland frontier village Eysden. I entered a deserted inn. After shouting for a long time, the inn-keeper appeared, looked shyly at me, remaining constantly close by the door of his room. His attitude showed that he was prepared to fly at the slightest suspicious movement on my part; but as soon as I had convinced him that I was a Netherland journalist, he became more friendly, and called his wife and daughters, so that I might tell them all I knew. They were very desirous to know how the war went ... in the Netherlands, and whether we were fighting the Germans or the English? It was very difficult to make them understand that they were under a misapprehension, but when I had at last succeeded in this, I started in my turn to ask them what they thought of my intention to go farther.At the same time bells rang ... and guns roared.

FRANCS-TIREURS?Cutting tools include nearly all that are employed in finishing; lathes, planing machines, drilling and boring machines, shaping, slotting and milling machines, come within this class. The machines named make up what are called standard tools, such [120]as are essential and are employed in all establishments where general machine manufacture is carried on. Such machines are constructed upon principles substantially the same in all countries, and have settled into a tolerably uniform arrangement of movements and parts.

Boring may be called internal turning, differing from external turning, because of the tools performing the cutting movement, and in the cut being made on concave instead of convex surfaces; otherwise there is a close analogy between the operations of turning and boring. Boring is to some extent performed on lathes, either with boring bars or by what is termed chuck-boring, in the latter the material is revolved and the tools are stationary.CHAPTER X. MACHINERY FOR TRANSMITTING AND DISTRIBUTING POWER."You are a journalist?"

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The valve gearing of automatic steam-hammers to fill the two conditions of allowing a dead or an elastic blow, furnishes one of the most interesting examples of mechanical combination.For loading and unloading carts and waggons, the convenience of the old outside sling is well known; it is also a well-attested fact that accidents rarely happen with sling hoists, although they appear to be less safe than running platforms or lifts. As a general rule, the most dangerous machinery for handling or raising material is that which pretends to dispense with the care and vigilance of attendants, and the safest machinery that which enforces such attention. The condition which leads to danger in hoisting machinery is, that the power employed is opposed to the force of gravity, and as the force of gravity is acting continually, it is always ready to take advantage of the least cessation in the opposing force employed, and thus drag away the weight for which the two forces are contending; as a weight when under the influence of gravity is moved [65] at an accelerated velocity, if gravity becomes the master, the result is generally a serious accident. Lifting may be considered a case wherein the contrivances of man are brought to bear in overcoming or opposing a natural force; the imperfect force of the machinery is liable to accident or interruption, but gravity never fails to act. Acting on every piece of matter in proportion to its weight must be some force opposing and equal to that of gravity; for example, a piece of iron lying on a bench is opposed by the bench and held in resistance to gravity, and to move this piece of iron we have to substitute some opposing force, like that of the hands or lifting mechanism, to overcome gravity.Presuming the reader to remember what was said of steam hammers in another place, and to be familiar with the uses and general construction of such hammers, let it be supposed steam-hammers, with the ordinary automatic valve action, those that give an elastic or steam-cushioned blow, are well known. Suppose further that by analysing the blows given by hammers of this kind, it is demonstrated that dead blows, such as are given when a hammer comes to a full stop in striking, are more effectual in certain kinds of work, and that steam-hammers would be improved by operating on this dead-stroke principle.

CHAPTER X. MACHINERY FOR TRANSMITTING AND DISTRIBUTING POWER.Of a heavy heart, however, there was not a trace. In the previous chapter I described how beastly they behaved during the destruction of Vis; how the soldiers drank immoderate quantities of alcohol, and then jeered at the wretched refugees; how they indulged in unmitigated vandalism, and wrecked by hand things of which they knew that by and by would be destroyed by fire."Have you got anything for me to eat?" I asked, not heeding his words.

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