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In no other branch of machinery has so much research and experiment been made during eighty years past as in steam machinery, and, strange to say, the greater part of this research has been directed to the details of engines; yet there has been no improvement made during the time which has effected any considerable saving of heat or expense. The steam-engines of fifty years ago, considered as steam-using machines, utilised nearly the same proportion of the energy or power developed by the boiler as the most improved engines of modern constructiona fact that in itself indicates that an engine is not the vital part of steam machinery. There is not the least doubt that if the efforts to improve steam-engines had been mainly directed to economising heat and increasing the evaporative power of boilers, much more would have been accomplished with the same amount of research. This remark, however, does not apply to the present day, when the principles of steam-power are so well understood, and when heat is recognised as the proper element to deal with in attempts to diminish the expense of power. There is, of course, various degrees of economy in steam-using as well as in steam-generating machinery; but so long as the best steam machinery does not utilise but one-tenth or one-fifteenth part of the heat represented in the fuel burned, there need be no question as to the point where improvements in such machinery should be mainly directed.

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"Perhaps already disposed of elsewhere?" Hetty suggested."Say, what a comedy!" she said. "What does it matter? It will be something to say afterwards that we knew the woman." このページの先頭です
ONE:There is nothing more interesting, or at the same time more useful, in the study of mechanics, than to analyse the action of cutting machines or other machinery of application, and to ascertain in examples that come under notice whether the main object of a machine is increased force, more accurate guidance, or greater speed than is attainable by hand operations. Cutting machines as explained may be directed to either of these objects singly, or to all of them together, or these objects may vary in their relative importance in different operations; but in all cases where machines are profitably employed, their action can be traced to one or more of the functions named.
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ONE:
ここから本文です
TWO:Down, almost like a hawk falling to its prey, the seaplane went through the still air.

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TWO:Their problem was to get above it, to ride it down, force it to take the sea or to come down in a crackup on shore if that must bebefore it could lose itself in that dull, gloomy, lowering bank of fog ahead.Bruce replied that he was just in the frame of mind for something of the kind. He was far too restless to settle down to anything.

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TWO:Lawrence complied with resignation. It was all about a beautiful bad woman who guarded a precious treasure locked away in a box covered with paintings of exquisite flowers. Mamie clapped her hands with delight.

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簡易?小型貫流ボイラ?貫流ボイラ向けに開発した純正ボイラ薬品。

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TWO:Another object gained by equal action on both sides of large pieces is the quality of the forgings produced, which is generally improved by the rapidity of the shaping processes, and injured by too frequent heating.

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TWO:
THREE:"Madame, there is but little to tell. You are indebted to that Paris firm for nearly a hundred thousand pounds. They call themselves financial agents, but they are moneylenders of the hardest type. Maitrank is as hard as your diamonds. And he has found you out, Countess."
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THREE:I have witnessed all the people during the very earliest days of the war. I came to Lige, passing between the forts, as described already. I was in Lixhe when the pontoon bridge was wrecked repeatedly by Fort Pontisse; I stayed at Vis three times before the destruction began, and I was there when the charming townlet was wrecked by fire; and in Louvain I have been dragged from my bed by six soldiers and arrested, when the whole town was still ablaze."3. The German and Belgian authorities will do everything in their power to prevent scarcity of food."