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TWO:No one has been able to explain clearly why a sudden change of temperature hardens steel, nor why it assumes various shades of colour at different degrees of hardness; we only know the fact, and that steel fortunately has such properties.

Distillation equipment01

Distillation equipment02

THREE:Quick to take it, dipping a wing and kicking rudder, the seaplanes pilot swerved a little, leveled off, and set down in a smother of foam, and on his wing also a man climbed close to the tip!Lastly, proportions; having estimated the cutting force required at one ton, although less than the actual strain in a machine of this kind, we proceed upon this to fix proportions, [157] beginning with the tool shank, and following back through the adjusting saddle, the cutting bar, connections, crank pins, shafts, and gear wheels to the belt. Starting again at the tool, or point of cutting, following through the supports of the rack, the jaws that clamp it, the saddle for the graduating adjustment, the connections with the main frame, and so on to the crank-shaft bearing a second time, dimensions may be fixed for each piece to withstand the strains without deflection or danger of breaking. Such proportions cannot, I am aware, be brought within the rules of ordinary practice by relying upon calculation alone to fix them, and no such course is suggested; calculation may aid, but cannot determine proportions in such cases; besides, symmetry, which cannot be altogether disregarded, modifies the form and sometimes the dimensions of various parts.
FORE:Skill, in the sense employed here, consists not only in preparing plans and in various processes for converting and shaping material, but also in the general conduct of an establishment, including estimates, records, system, and so on, which will be noticed in their regular order. The amount of labour involved, and consequently the first cost of machinery, is in a large degree as the number of mechanical processes required, and the time consumed in each operation; to reduce the number of these processes or operations, shorten the time in which they may be performed, [27] and improve the quality of what is produced, is the business of the mechanical engineer. A careful study of shop operations or processes, including designing, draughting, moulding, forging, and fitting, is the secret of success in engineering practice, or in the management of manufactures. The advantages of an economical design, and the most carefully-prepared drawings, are easily neutralised and lost by careless or improper manipulation in the workshop; an incompetent manager may waste ten pounds in shop processes, while the commercial department of a work saves one pound by careful buying and selling.

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FORE:It was a cruel sight. At a tolerably quick pace59 hundreds of soldiers marched out in the direction of the fort, dragging light ordnance with them. One of the officers explained to me that the big guns could not yet operate here; and now a division of foot-artillery was commanded to occupy a small hill near the fort. The big guns had to support them on the way. The guns roared as if all the thunderbolts of heaven had been flung into space. The smoke of the powder poisoned the air and made me cough. Gradually my surroundings were enveloped in a thin haze, which became denser and more suffocating the longer the guns roared. And at last those hundreds of men, dragging their guns along the byways, looked merely like shades."S?ur Eulalie!... S?ur Eulalie!... You ... you ... are a ... cousin ... of ... S?ur Eulalie?"

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FORE:"Did you speak to the Spanish woman?" he asked.He explained to me that one of those soldiers accused me of ... spying and arson. He had thought to recognise in me a person who had asked him that afternoon whether he was ... a Belgian or a German soldier, and whom he had also seen escaping from a factory which was in full blaze a moment later.

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