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For loading and unloading carts and waggons, the convenience of the old outside sling is well known; it is also a well-attested fact that accidents rarely happen with sling hoists, although they appear to be less safe than running platforms or lifts. As a general rule, the most dangerous machinery for handling or raising material is that which pretends to dispense with the care and vigilance of attendants, and the safest machinery that which enforces such attention. The condition which leads to danger in hoisting machinery is, that the power employed is opposed to the force of gravity, and as the force of gravity is acting continually, it is always ready to take advantage of the least cessation in the opposing force employed, and thus drag away the weight for which the two forces are contending; as a weight when under the influence of gravity is moved [65] at an accelerated velocity, if gravity becomes the master, the result is generally a serious accident. Lifting may be considered a case wherein the contrivances of man are brought to bear in overcoming or opposing a natural force; the imperfect force of the machinery is liable to accident or interruption, but gravity never fails to act. Acting on every piece of matter in proportion to its weight must be some force opposing and equal to that of gravity; for example, a piece of iron lying on a bench is opposed by the bench and held in resistance to gravity, and to move this piece of iron we have to substitute some opposing force, like that of the hands or lifting mechanism, to overcome gravity.

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In arranging the details of machines, it is impossible to have a special standard of dimensions for each case, or even for each shop; the dimensions employed are therefore made to conform to some general standard, which by custom becomes known and familiar to workmen and to a country, or as we may now say to all countries.
  • TWO:

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  • TWO:"The destruction took place from August 21st to the 25th.22

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  • TWO:"The Corner House Mystery! Startling Developments! Ren Lalage's Escape From Holloway! A Warder Seriously Injured! The Culprit Succeeds In Getting Clear Away!"John Buchan.

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THREE:That-there is just what I cant tell you, Jeff replied.
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THREE:
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THREE:"What on earth is that?" Charlton asked.
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FORE:At the risk of laying down a proposition not warranted by science, I will mention, in connection with this matter of crystallisation, that metal when disposed in the form of a ring, for some strange reason seems to evade the influences which produce crystalline change. A hand-hammer, for example, may be worn away and remain fibrous; the links of chains and the tires of waggon wheels do not become crystallised; even the tires on locomotive wheels seem to withstand this influence, although the conditions of their use are such as to promote crystallisation. 8.00 - 10.00 | JUN 09,2014

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FORE:Ren broke out into sudden exultation. He saw it all now. He had been lulled into a false position of security, and Leona had slunk away and called for assistance on the telephone. He had not known that there was such a thing in the house. How she must have smiled at him in her sleeves all the time, knowing that his capture was certain, and that she had her own avenue of escape. 9.00 - 10.00 | FEB 15,2014

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FORE: 11.00 - 10.00 | JUN 10,2014

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THREE:"Ah, you have been down for Mamie," the Countess exclaimed. "She had one of her turns again. Give the poor child some of that soda-water and then follow me. Be quick.""Of course, you know where the Dutchman is to be found?"

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For the moment all they knew was that the Germans were in the town, as none of them yet had ventured outside the building. At present their great fear was that Germans might be billeted on them.... Oh! they might take everything if only they did not come themselves.Movements and strains may be called two of the leading conditions upon which designs for machines are based: movements determine general dimensions, and strains determine the proportions and sizes of particular parts. Movement and strain together determine the nature and area of bearings or bearing surfaces.Besides Zeno, Parmenides seems to have had only one disciple of note, Melissus, the Samian statesman and general; but under various modifications and combined with other elements, the Eleatic absolute entered as a permanent factor into Greek speculation. From it were lineally descended the Sphairos of Empedocles, the eternal atoms of Leucippus, the Nous of Anaxagoras, the Megaric Good, the supreme solar idea of Plato, the self-thinking thought of Aristotle, the imperturbable tranquillity attributed to their model sage by Stoics and Epicureans alike, the sovereign indifference of the Sceptics, and finally, the Neo-platonic One. Modern philosophers have sought for their supreme ideal in power, movement, activity, life, rather than in any stationary substance; yet even among them we find Herbart partially reviving the Eleatic theory, and confronting Hegels fluent categories with his own inflexible monads.Bruce looked at the speaker absolutely too astounded to say a word.
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