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Next day I was already back in Lige, where much was changed after my last visit. The Germans went on terrorising the inhabitants, and these, being extremely frightened, looked with suspicion at every stranger. In the streets was the smoke of burning houses, especially from Outre-Meuse.The successful application of the pneumatic system at the Mont Cenis Tunnel in Italy, and at the Hoosac Tunnel in America, has demonstrated the value of the system where the air not only served to transmit power to operate the machinery but to ventilate the mines at the same time. Air brakes for railway trains are another example illustrating the advantages of pneumatic transmission; the force being multiplied at the points where it is applied, so that the connecting pipes are reduced to a small size, the velocity of the air making up for a great force that formerly had to be communicated through rods, chains, or shafts. The principal object attained by the use of air to operate railway brakes is, however, to maintain a connection throughout a train by means of flexible pipes that accommodate themselves to the varying distance between the carriages. Presuming that the flow of air in pipes is not materially impeded by friction or angles, and that there will be no difficulty in maintaining lubrication for pistons or other inaccessible parts of machinery when driven by air, there seems to be many reasons in favour of its use as a means of distributing power in manufacturing districts. The diminished cost of motive power when [56] it is generated on a large scale, and the expense and danger of maintaining an independent steam power for each separate establishment where power is employed, especially in cities, are strong reasons in favour of generating and distributing power by compressed air, through pipes, as gas and water are now supplied.
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TWO:Fourth. The arrangement of the parts of a combination machine have to be modified by the relations between them, instead of being adapted directly to the work to be performed.
THREE:"Very well," she said, "I'll come up for a moment. I'm not going far, and I shall not be a long time away. If there is a crisis in the case----"Prout took a sheet of paper from his desk and held it up. It was a portrait of a fair Spanish gipsy. The letterpress and border had been cut away.

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THREE:Now what distinguishes Spenser from Dante is that, while he also disposes his inventions according to an extremely artificial and abstract schematism, with him, as with Plato, abstractions acquire a separate individual existence, being, in fact, embodied as so many persons; while Dante, following Aristotle, never separates his from the concrete data of experience. And it may be noted that, in this respect at least, English literature has not deserted the philosophy which presided over its second birth. It has ever since been more prone to realise abstractions than any other literature, whether under the form of allegories, parables, or mere casual illustrations drawn from material objects. Even at this day, English writers crowd their pages with dazzling metaphors, which to Continental readers must have sometimes a rather barbaric effect.

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THREE:For set squares, or triangles, as they are sometimes called, no material is so good as ebonite; such squares are hard, smooth, impervious to moisture, and contrast with the paper in colour; besides they wear longer than those made of wood. For instruments, it is best to avoid everything of an elaborate or fancy kind; such sets are for amateurs, not engineers. It is best to procure only such instruments at first as are really required, of the best quality, and then to add others as necessity may demand; in this way, experience will often suggest modifications of size or arrangement that will add to the convenience of a set.

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  • THREE:Then there was the voice of Balmayne in a key of mirth. The front door was opened, the call of a cab whistle thrilled down the street. It was almost as if there were two sets of people in the house, one family given over to the dark and gloomy, the other all comedy and smiles."You have been so long," she said, pitifully, "so very long. And why didn't you come when I heard you standing by the door."
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We passed a dead field-officer who still laid hold of a piece of a flag. When I read that sort of thing in a book, I thought: "how pretty and romantic," but never believed that this would actually happen in war-time. I saw the reality now, and, deeply touched, bared my head, saluting that dead hero. From papers we found on him we saw that his name was Van Gesthel; like most Belgians, he had been killed by shell.On the strength of this Mr. Wallace elsewhere observes:(1.) If milling tools operate faster than planing or turning tools, why are they not more employed?(2.) How may the effect produced by cutting tools generally be computed?(3.) To what class of work are milling machines especially suited?(4.) Why do milling processes produce more accurate dimensions than are attainable by turning or planing?(5.) Why can some branches of manufacture be said to depend on milling processes?
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