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(1.) Why has the lifting of weights been made a standard for the measure of power?(2.) Name some of the difficulties to contend with in the operation of machinery for lifting or handling material.(3.) What analogy exists between manual handling and the operation of hydraulic cranes?(4.) Explain how the employment of overhead cranes saves room in a fitting shop.(5.) Under what circumstances is it expedient to move material vertically?(6.) To what circumstances is the danger of handling mainly attributable?

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"Nemesis is slow but sure," he said. "My turn will come. That letter is locked up in the safe yonder. Would you like to see it and compare it with my own ordinary handwriting? Oh, that was a wonderful woman!"
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ONE:Oh, Sandy, youre letting wild imagination run away with you!As remarked in the case of other machines treated of, there is no use of describing the mechanism of trip-hammers; it is presumed that every engineer apprentice has seen trip-hammers, or can do so; and the plan here is to deal especially with what he cannot see, and would not be likely to learn by casual observation.
TWO:They smoked on for some little time idly. These men were prepared for most things, but they preferred idleness and tobacco to anything else. It was only Lalage who was restless and uneasy. As the time passed he glanced impatiently at the door. Then there came another knock without. In euismod quam ac dictum

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ONE:A short time after the destruction I was even obliged to accept it for a whole week, as on the same day on which I arrived in Louvain for another visit there was renewed fighting round the town. The Belgians had advanced as far as Rotselair, where the next day they held their ground against overwhelmingly superior numbers; but at last they had to retire, leaving a great many dead behind. The Belgians had even got on to the road Tirlemont-Louvain, and blown up the railway line in two places.Those who will may see in all this an anticipation of chemical substitution and double decomposition. We can assure them that it will be by no means the most absurd parallel discovered between ancient and modern ideas. It is possible, however, to trace a more real connexion between the Aristotelian physics and mediaeval thought. We do not of361 course mean the scholastic philosophy, for there never was the slightest doubt as to its derivation; we allude to the alchemy and astrology which did duty for positive science during so many centuries, and even overlapped it down to the time of Newton, himself an ardent alchemist. The superstitions of astrology originated independently of the peripatetic system, and probably long before it, but they were likely to be encouraged by it instead of being repressed, as they would have been by a less anthropomorphic philosophy. Aristotle himself, as we have seen, limited the action of the heavens on the sublunary sphere to their heating power; but, by crediting them with an immortal reason and the pursuit of ends unknown to us, he opened a wide field for conjecture as to what those ends were, and how they could be ascertained. That the stars and planets were always thinking and acting, but never about our affairs, was not a notion likely to be permanently accepted. Neither was it easy to believe that their various configurations, movements, and names (the last probably revealed by themselves) were entirely without significance. From such considerations to the casting of horoscopes is not a far remove. The Aristotelian chemistry would still more readily lend itself to the purposes of alchemy. If Nature is one vast process of transmutation, then particular bodies, such as the metals, not only may, but must be convertible into one another. And even those who rejected Aristotles logic with scorn still clung to his natural philosophy when it flattered their hopes of gain. Bacon kept the theory of substantial forms. His originality consisted in looking for a method by which any form, or assemblage of forms might be superinduced at pleasure on the underlying matter. The real development of knowledge pursued a far different course. The great discoverers of the sixteenth and seventeenth centuries achieved their success by absolutely reversing the method of Aristotle, by bringing into fruitful contact principles which he had condemned to barren isolation.362 They carried terrestrial physics into the heavens; they brought down the absoluteness and eternity of celestial law to earth; they showed that Aristotles antithetical qualities were merely quantitative distinctions. These they resolved into modes of motion; and they also resolved all motions into one, which was both rectilinear and perpetual. But they and their successors put an end to all dreams of transmutation, when they showed by another synthesis that all matter, at least within the limits of our experience, has the changeless consistency once attributed exclusively to the stellar spheres.
TWO:Hetty dragged herself to her feet. She was utterly exhausted with her fight, but there was the fierce triumph of knowing that she had won. She had played her part and the rest of it was in cleverer hands than her own.For the rest most houses in the market-place were on fire. Soldiers were billeted on one of the corner houses, and I was of course detained there, but released again, after having been requested to show up the francs-tireurs. I had to consider also where I might pass the night in this burning city? I asked an officer's consent to stay the night with the soldiers. He gave his permission if I could get the consent of the commanding officer, whom I might find at the station; he told me that he was sure to grant it.
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ONE:"Thank you for that," Bruce said gratefully.
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ONE:The mechanical engineer deals mainly with the natural forces, and their application to the conversion of material and transport. His calling involves arduous duties; he is brought in contact with what is rough and repulsive, as well as what is scientific and refined. He must include grease, dirt, manual labour, undesirable associations, and danger with apprenticeship, or else be content to remain without thoroughly understanding his profession.
TWO: FORE:"Go in and win," Balmayne whispered. "Always back your luck."On the Thursday of the week of destruction the inhabitants were notified that they had to leave the town, but Professor Noyons and his wife decided to stay on, as they could not leave the one hundred and fifty wounded men who were laid up at the Institution.

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ONE:"That is a Netherland girl, sir, who was staying at her aunt's at Lige ... I mean to say at Vis, and whom I take now with me to Maastricht."
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Besides this want or difference of facilities which establishments may afford, there is the farther distinction to be made between an engineering establishment and one that is directed to the manufacture of staple articles. This distinction between engineering-works and manufacturing is quite plain to engineers themselves, but in many cases is not so to those who are to enter as apprentices, nor to their friends who advise them. In every case where engagements are made there should be the fullest possible investigation as to the character of the works, not only to protect the learner, but to guard regular engineering establishments in the advantages to be gained by apprentice labour. A machinist or a manufacturer who employs only the muscular strength and the ordinary faculties of workmen in his operations, can afford to pay an apprentice from the beginning a fair share of his earnings; but an engineering-work that projects original plans, generates designs, and assumes risks based upon skill and special knowledge, is very different from a manufactory. To manufacture is to carry on regular processes for converting material; such processes being constantly the same, or approximately so, and such as do not demand much mechanical knowledge on the part of workmen."It shall be done," he said hoarsely. "Speak."But it is equally certain that at Lige as well as at Namur and Antwerp the Austrian thirty-point-five mortars were used, siege-guns chiefly, and these were taken by the German soldiers for forty-two's. These Austrian mortars were equally misnamed in German, French, and even Netherland illustrated papers."Correct to a fault," Bruce cried.III.
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