ONE:By sheer habit she looked at the label. It was the same, and not the same. Hetty stifled a cry of surprise. She had made no mistake before--of that she was certain. Then what could possibly have happened? Somebody had crept into the room in her absence and changed the bottles!On the whole, I am afraid that my acquaintance with the modern literature of the subject will be found rather limited for an undertaking like the present. But I do not think that wider reading in that direction would have much furthered the object I had in view. That object has been to exhibit the principal ideas of Greek philosophy in the closest possible connexion with the characters of their authors, with each other, with their developments in modern speculation, with the parallel tendencies of literature and art, with the history of religion, of physical science, and of civilisation as a whole. To interpret all things by a system of universal references is the method of philosophy; when applied to a series of events this method is the philosophy of history; when the events are ideas, it is the philosophy of philosophy itself.
TWO:
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TWO:This article has been introduced, not only to give a true understanding of the effect and value of machine combination, but to caution against a common error of confounding machine combination with invention.
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THREE:5. The loss of power during transmission."What time would that be?" Bruce asked as casually as possible.
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THREE:All the lights in the room were ablaze; at one end of the table was a dainty supper, flanked by a couple of gold-topped bottles. A little shabby man with a hooked nose was in the act of taking off a heavy fur-lined coat.
FORE:Handling and moving material is the principal matter to be considered in the arrangement of engineering works. The constructive manipulation can be watched, estimated, and faults detected by comparison, but handling, like the designs for machinery, is a more obscure matter, and may be greatly at fault without its defects being apparent to any but those who are highly skilled, and have had their attention especially directed [73] to the matter.
THREE:Chuck-boring is employed in three cases; for holes of shallow depth, taper holes, and holes that are screw-threaded. As pieces are overhung in lathe-boring there is not sufficient rigidity neither of the lathe spindle nor of the tools to admit of deep boring. The tools being guided in a straight line, and capable of acting at any angle to the axis of rotation, the facilities for making tapered holes are complete; and as the tools are stationary, and may be instantly adjusted, the same conditions answer for cutting internal screw-threads; an operation corresponding to cutting external screws, except that the cross motions of the tool slide are reversed.
FORE:At Fort Pontisse or Lierce they seemed to have noticed that the factory was a station for observation. As the officer was still thinking about my case, one of those infernal monster shells crashed down among a group of soldiers, only some yards away. Those who were not hit ran away, but they came back soon, and took up seven or eight comrades, whom they carried into the factory. I shuddered when I saw what had happened, and through the shock the sight gave me I involuntarily jerked my arms.
THREE:161 "Here rest 23 soldiers, German, I.R. 78. and 91. fell 22.8.14. R.I.P."The most perfect castings for gear wheels and pulleys and other pieces which can be so moulded, are made by drawing the patterns through templates without rapping. These templates are simply plates of metal perforated so that the pattern can be forced through them by screws or levers, leaving the sand intact. Such templates are expensive to begin with, because of the accurate fitting that is required, especially around the teeth of wheels, and the mechanism that is required in drawing the patterns, but when a large number of pieces are to be made from one pattern, such as gear wheels and pulleys, the saving of labour will soon pay for the templates and machinery required, to say nothing of the saving of metal, which often amounts to ten per cent., and the increased value of the castings because of their accuracy.
FORE:(1.) What analogy may be found between steam and water power?(2.) What is the derivation of the name turbine?(3.) To what class of water-wheels is this name applicable?(4.) How may water-wheels be classified?(5.) Upon what principle does a reaction water-wheel operate?(6.) Can ponderable weight and pressure be independently considered in the case?(7.) Why cannot radial running joints be maintained in machines?(8.) Describe the mechanism in common use for sustaining the weight of turbine wheels, and the thrust of propeller shafts.
THREE:CHAPTER XXXII. TOUCH AND GO.
FORE:Balmayne's move had been a clever one, and quite worthy of a mind like his. He recognised at once that Bruce's presence there meant danger. If Maitrank, in the excitement of the moment, chose to speak out, all the delicately-laid plans would be ruined.To their startled ears came a muffled clang, a queer, hollow soundand as they turned to run back under the rolled-up door, it slid rapidly down in its grooves, dropping into place with a hollow rumble.
THREE:
FORE:Far behind them in their swift chase, with every ounce of power put into their engine and their whole hearts urging it to better speed, the Sky Patrol saw the amphibian swerve toward shore and give up the try for whatever that precious life preserver had attached to it.Descartes had already accomplished a great simplification of the speculative problem by summing up all existence under the two heads of extension and thought. It remained to account for these, and to reduce them to a single idea. As we have seen, they were derived from Greek philosophy, and the bond which was to unite them must be sought for in the same direction. It will be remembered that the systems of Plato and Aristotle were bounded at either extremity by a determinate and by an indeterminate principle. With the one, existence ranged between the Idea of Good at the upper end of the scale and empty space at the lower; with the other, between absolute Thought and First Matter. It was by combining the two definite terms, space and thought, that Descartes had constructed his system; and after subtracting these the two indefinite terms remained. In one respect they were even more opposed to each other than were the terms with which they had been respectively associated. The Idea403 of Good represented unity, identity, and constancy, as against plurality, difference, and change; while Aristotles Matter was, by its very definition, multiform, fluctuating, and indeterminate. Nevertheless, there were equally important analogies traceable between them. No very clear account could be given of either, and both were customarily described by negatives. If Matter fell short of complete existence, the Good transcended all existence. If the one was a universal capacity for assuming Forms, the other was the source whence all Forms proceeded. When the distinctive characteristics of an individual were thought away, the question might well be mooted into which principle it would return. The ambiguous use of the word Power contributed still further to their identification, for it was not less applicable to the receptive than to the productive faculty. Now we have just seen into what importance the idea of Power suddenly sprang at the Renaissance: with Bruno it was the only abiding reality of Nature; with Hobbes it was the only object of human desire.
THREE:"Oh no, sir, not at all!"
Perspiciatis unde omnis iste natus error sit voluptatem accu santium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo.
THREE:A pair of spring calipers will illustrate this principle. The points are always steady, because the spring acting continually in one direction compensates the loose play that may be in the screw. In a train of tooth wheels there is always more or less play between the teeth; and unless the wheels always revolve in one direction, and have some constant resistance offered to their motion, 'backlash' or irregular movement will take place; but if there is some constant and uniform resistance such as a spring would impart, a train of wheels will transmit the slightest motion throughout."The Commanding Officer,
Perspiciatis unde omnis iste natus error sit voluptatem accu santium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo.
THREE:Direct action and reaction are equal; if a force is exerted in any direction there must be an equal force acting in the opposite direction; a machine must absorb its own strains.
Perspiciatis unde omnis iste natus error sit voluptatem accu santium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo.
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Our Client
FORE:"And what do you want for this?" he asked.
The tools employed for cutting screw threads constitute a separate class among the implements of a fitting shop, and it is considered best to notice them separately."As it happens, I know the gentleman," she said. "When I was governess to the Countess Lalage's little girl he frequently came to the house. I am a niece of Mr. Gilbert Lawrence, the novelist, who lives close by. There is a room to spare in his house, and this looks like a bad case. If you will follow me----""Is this then the road to Vis?"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.
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