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Considered mechanically as a means of handling material, the human hands are capable of exerting force in any direction, vertically, horizontally, or at any angle, moving at various rates of speed, as the conditions may require, and with varying force within the limits of human strength. These functions enable us to pick up or lay down a weight slowly and carefully, to transport it at a rapid rate to save time, to move it in any direction, and without the least waste of power, except in the case of carrying small loads, when the whole body has to be moved, as in ascending or descending stairs. The power travelling cranes, that are usually employed in machine-fitting establishments, are perhaps the nearest approach that has been made to the human frame in the way of handling mechanism; they, however, lack that very important feature of a movement, the speed of which is graduated at will. It is evident that in machinery of any kind for handling and lifting that moves at a uniform rate of speed, and this rate of speed adapted, as it must be, to the conditions of starting or depositing a load, much time must be lost in the transit, especially when the load is moved for a considerable distance. This uniform speed is perhaps the greatest defect in the lifting machinery in common use, at least in such as is driven by power.

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Deftly Jeff caught the skid.To follow this matter further. It will be found in such machines as are directed mainly to augmenting force or increasing the amount of power that may be applied in any operation, such as sawing wood or stone, the effect produced when compared to hand labour is nearly as the difference in the amount of power applied; and the saving that such machines effect is generally in the same proportion. A machine that can expend ten horse-power in performing a certain kind of work, will save ten times as much as a machine directed to the same purpose expending but one horse-power; this of course applies to machines for the performance of the coarser kinds of work, and employed to supplant mere physical effort. In other machines of application, such as are directed mainly to guidance, or speed of action, such as sewing machines, dove-tailing machines, gear-cutting machines, and so on, there is no relation whatever between the increased [59] effect that may be produced and the amount of power expended."Not that I am asking for sheer curiosity," she said gaily. "You see I am also in a position to throw a little light in a dark place. Do you know that the rest of the missing notes have been in my possession?"
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THREE:Air seems to be the most natural and available medium for transmitting and distributing power upon any general system like water or gas, and there is every probability of such a system existing at some future time. The power given out by the expansion of air is not equal to the power consumed in compressing it, but the loss is but insignificant compared with the advantages that may be gained in other ways. There is no subject more interesting, and perhaps few more important for an engineering student to study at this time, than the transmission of power and the transport of material by pneumatic apparatus."True," Leona murmured, "true. You are too strong for me." FORE:A survey of the Socratic philosophy would be incomplete without some comment on an element in the life of Socrates, which at first sight seems to lie altogether outside philosophy. There is no fact in his history more certain than that he believed himself to be constantly accompanied by a Daemonium, a divine voice often restraining him, even in trifling matters, but never prompting to positive action. That it was neither conscience in our sense of the word, nor a supposed familiar spirit, is now generally admitted. Even those who believe in the supernatural origin and authority of our moral feelings do not credit them with a power of divining the accidentally good or evil consequences which may attend on our most trivial and indifferent actions; while, on the other hand, those feelings have a positive no less than a negative161 function, which is exhibited whenever the performance of good deeds becomes a duty. That the Daemonium was not a personal attendant is proved by the invariable use of an indefinite neuter adjective to designate it. How the phenomenon itself should be explained is a question for professional pathologists. We have here to account for the interpretation put upon it by Socrates, and this, in our judgment, follows quite naturally from his characteristic mode of thought. That the gods should signify their pleasure by visible signs and public oracles was an experience familiar to every Greek. Socrates, conceiving God as a mind diffused through the whole universe, would look for traces of the Divine presence in his own mind, and would readily interpret any inward suggestion, not otherwise to be accounted for, as a manifestation of this all-pervading power. Why it should invariably appear under the form of a restraint is less obvious. The only explanation seems to be that, as a matter of fact, such mysterious feelings, whether the product of unconscious experience or not, do habitually operate as deterrents rather than as incentives.

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THREE: FORE:

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THREE:CHAPTER LVII. A WAY OUT.In order to give the reader some idea of the fearful things that happened at Dinant, I insert163 here some quotations from the reports drawn up by the Belgian Inquiry Committee about the Violations of International Law, of which I can affirm the truth word for word, because they are identical with the information that I got myself at Dinant.
  • THREE:Hetty clung to Bruce's arm as if fearful for her safety. Of course, he was absolutely innocent, but how far the world would believe it was quite another matter. For the girl was quick and clear-sighted, and it needed no explanation to show her Bruce's terrible position.

    by Daniel Nyari View on Dribbble

    FORE:"Gordon is very sensitive," said Hetty. "That's the kind of thing that hurts."Professor John Sweet of Cornell University, in America, while delivering an address to the mechanical engineering classes, during the same year, made use of the following words: "It is [5] not what you 'know' that you will be paid for; it is what you can 'perform,' that must measure the value of what you learn here." These few words contain a truth which deserves to be earnestly considered by every student engineer or apprentice; as a maxim it will come forth and apply to nearly everything in subsequent practice.

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  • THREE:"Motor car," the stolid dragoon replied. "I've got a fifteen horsepower Daimler that I can knock seventy miles an hour out of at a pinch. And no danger of being picked up for scorching on a dark night like this."In the case of line shafting for manufactories, if the speed varies so much from that of the first movers on machines as to require one or more intermediate or countershafts, the expense would be very great; on the contrary, if countershafts can be avoided, there is a great saving of belts, bearings, machinery, and obstruction. The practical limit of speed for line shafts is in a great measure dependent upon the nature of the bearings, a subject that will be treated of in another place.

    by Daniel Nyari View on Dribbble

    FORE:"I'm at No. 1, Lytton Avenue," she said, "Countess Lalage's, you know. Yes, I am quite aware of the fact that it is an empty house. But there is a lot of stuff here that is worth fetching. In fact, there is somebody in the dining-room now. Are you going to do anything, or shall I give the alarm?"Lawrence gave the necessary information. He was a little surprised to hear that his hostess had never heard of the tuberose. Nor, fond of flowers as she seemed, did she appear in the least interested.

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  • THREE:"Quite so. The man was all twisted from his hip, and he had a crooked nose."Only the youngest member of the trio, as the craft nosed into a gentle glide and banked in a turn to get in position to shoot the private landing spot on the old estate, took the occasion as anything but a lark.

    by Daniel Nyari View on Dribbble

    FORE:"We are in time," Lawrence whispered, "in good time. I felt sure I could trust the one I picked out to assist me. If I had not been detained I should have been here before. There is not much for us to do.""Community of ...

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THREE:Was the gun I had seen there one of the notorious forty-two centimetre monsters? I should not like to wager my head in affirming that. It was an inordinately unwieldy and heavy piece of ordnance, but during the first days of the war nothing or very little had yet been said or written about these forty-two's, and I did not pay sufficient attention to the one I saw. Only after the fall of Loncin did all those articles about the forty-two's appear in the papers, and the Germans certainly asserted that they destroyed Loncin by means of such a cannon.In the case of tools composed partly of iron and partly of steel, steel laid as it is called, the tendency to crack in hardening may be avoided in most cases by hammering the steel edge at a low temperature until it is so expanded that when cooled in hardening it will only contract to a state of rest and correspond to the iron part; the same result may be produced by curving a piece, giving convexity to the steel side before hardening.
THU 14 May, 2015
FORE:

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THU 14 May, 2015
FORE:A document purporting to be Aristotles will has been preserved by Diogenes Laertius, and although some objections to its authenticity have been raised by Sir A. Grant, they have, in our opinion, been successfully rebutted by Zeller.180 The philosophers testamentary dispositions give one more proof of his thoughtful consideration for the welfare of those about him, and his devotion to the memory of departed friends. Careful provision is made for the guardianship of his youthful children, and for the comfort of his second wife, Herpyllis, who, he says, had been good to him. Certain slaves, specified by name, are to be emancipated, and to receive legacies. None of the young slaves who waited on him are to be sold, and on growing up they are to be set free if they deserve it. The bones of his first wife, Pythias, are, as she herself desired, to be laid by his. Monuments are to be erected in memory of his mother, and of certain friends, particularly Proxenus, who had been Aristotles guardian, and his family.The functions and adaptations of machinery constitute, as already explained, the science of mechanical engineering. The functions of a machine are a foundation on which its plans are based; hence machine functions and machine effect are matters to which the attention of an apprentice should first [11] be directed.

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THU 14 May, 2015
FORE:"Sterzel,

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THREE:The profit reaped by Aristotle from the connexion seems equally doubtful. Tradition tells us that enormous sums of money were spent in aid of his scientific researches, and a whole army of crown servants deputed to collect information287 bearing on his zoological studies. Modern explorations, however, have proved that the conquests of Alexander, at least, did not, as has been pretended, supply him with any new specimens; nor does the knowledge contained in his extant treatises exceed what could be obtained either by his own observations or by private enquiries. At the same time we may suppose that his services were handsomely rewarded, and that his official position at the Macedonian Court gave him numerous opportunities for conversing with the grooms, huntsmen, shepherds, fishermen, and others, from whom most of what he tells us about the habits of animals was learned. In connexion with the favour enjoyed by Aristotle, it must be mentioned as a fresh proof of his amiable character, that he obtained the restoration of Stageira, which had been ruthlessly destroyed by Philip, together with the other Greek cities of the Chalcidic peninsula.

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"It will give me a good supper free," he said, "and a glass of wine. And if you try any tricks on me, heaven help you, for I won't!""The first day the religious were allowed to give them some food, although not sufficient. Soon they had nothing to eat but carrots and unripe fruit.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.The military organisation of the empire had the further effect of giving a high social status to retired centurionsmen probably recruited from the most barbarous provincial populations, and certainly more remarkable for their huge size than for their mental gifts.316 When one of these heroes heard a philosopher state that nothing can be made out of nothing, he would ask with a horse-laugh whether that was any reason for going without ones dinner.317 On the other hand, when it came to be a question of supernatural agency, a man of this type would astonish the Jews themselves by his credulity. Imbued with the idea of personal authority, he readily fancied that anyone standing high in the favour of God could cure diseases from a distance by simply giving them the word of command to depart.318
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