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Next in order are strains. As the cutting action is the source of strains, and as the resistance offered by the cutting tools is as the length or width of the edges, it will be found in the present case that while other conditions thus far have pointed to small proportions, there is now a new one which calls for large proportions. In displacing the metal between teeth of three-quarters of an inch pitch, the cutting edge or the amount of surface acted upon is equal to a width of one inch and a half. It is true, the displacement may be small at each cut, but the strain is rather to be based upon the breadth of the acting edge than the actual displacement of metal, and we find here strains equal to the average duty of a large planing machine. This strain radiates from the cutting point as from a centre, falling on the supports of the work with a tendency to force it from the framing. Between the rack and the crank-shaft bearing, through the medium of the tool, cutter bar, connection, and crank pin, and in various directions and degrees, this strain may be followed by means of a simple diagram. Besides this cutting strain, there are none of importance; the tension of the belt, the side thrust in bearings, the strain from the angular thrust of the crank, and the end thrust of the tool, although not to be lost sight of, need not have much to do with problems of strength, proportion, and arrangement.

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All soldiers and officers took the siege of the great fortress calmly, convinced that at the most it would be able to hold out for very few days. Reliable information soon gave me the same impression, although I had wished it might have been quite different. When I left the scene of the fight all the forts from Waelhem to St. Cathrine-Waver had been silenced and in the hands of the Germans, who would soon attack the inner circle of forts.CHAPTER XXII. FOR LOVE AND DUTY.
ONE:Smoke was trailing over the yachts stern, Sandy murmured. Now its blowing off to the starboard side. Shes swinging toward us.

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THREE:

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THREE:These are but a few of many influences which tend to irregular cooling, and are described with a view of giving a clue from which other causes may be traced out. The want of uniformity in sections which tends to irregular cooling can often be avoided without much loss by a disposition of the metal with reference to cooling strains. This, so far as the extra metal required to give uniformity to or to balance the different sides of a casting, is a waste which engineers are sometimes loth to consent to, and often neglect in designs for moulded parts; yet, as before said, the difficulty of irregular cooling can in a great degree be counteracted by a proper distribution of the metal, without wasting, if the matter is properly understood. No one is prepared to make designs for castings who has not studied the subject of cooling strains as thoroughly as possible, from practical examples as well as by theoretical deductions.

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  • FORE:But neither when he left the darkling womb,

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  • FORE:CHAPTER XLII. FEAR!

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  • FORE:"Till next time," he said. "It's all over with me. The pitcher has gone too often to the well, and it has got broken at last. And I deserved all I got--there is no question whatever about that."Or, more briefly stated

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  • FORE:This principle is somewhat obscure, and the nature of percussive forces not generally considereda matter which may be illustrated by considering the action of a simple hand-hammer. Few [103] people, in witnessing the use of a hammer, or in using one themselves, ever think of it as an engine giving out tons of force, concentrating and applying power by functions which, if performed by other mechanism, would involve trains of gearing, levers, or screws; and that such mechanism, if employed instead of a hammer, must lack that important function of applying force in any direction as the will and hands may direct. A simple hand-hammer is in the abstract one of the most intricate of mechanical agentsthat is, its action is more difficult to analyse than that of many complex machines involving trains of mechanism; yet our familiarity with hammers causes this fact to be overlooked, and the hammer has even been denied a place among those mechanical contrivances to which there has been applied the name of "mechanical powers."It all sounded sorry nonsense in Hetty's ears, but she was playing her part, and merely talking against the clock. With blazing eyes the Countess advanced, but Hetty did not flinch.

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THREE:The most important result of the old Pythagorean teaching was, that it contributed a large elementsomewhat too large, indeed,to Platos philosophy. Neo-Pythagoreanism bears precisely the same relation to that revived Platonism which was the last outcome of ancient thought. It will be remembered that the great controversy between Stoicism and Scepticism, which for centuries divided the schools of Athens, and was passed on by them to Cicero and his contemporaries, seemed tending towards a reconciliation based on a return to the founder of the Academy, when, from whatever cause, Greek speculation came to a halt, which continued until the last third of the first century after Christ. At that epoch, we find a great revival of philosophical interest, and this revival seems to have been maintained for at least a hundred years, that is to say, through the whole of what is called the age of the Antonines. In the struggle for existence among the rival sects which ensued, Platonism started with all the advantages that a great inheritance and a great name could bestow. At the commencement of this period, we find the Academy once more professing to hold the doctrines of its founder in their original purity and completeness. Evidently the sober common-sense view of Antiochus had been discarded, and Platos own writings were taken as an authoritative standard of truth. A series of industrious commentators undertook the task of elucidating their contents. Nor was it only in the schools that their influence was felt. The beauty of their style must have strongly recommended the Dialogues to the attention of literary men. Plutarch, the most considerable Greek writer of his time, was a declared Platonist. So251 also was the brilliant African novelist, Apuleius, who flourished under Marcus Aurelius. Celsus, the celebrated anti-Christian controversialist, and Maximus, the Tyrian rhetorician, professed the same allegiance; and the illustrious physiologist Galen shows traces of Platonic influence. Platonism, as first constituted, had been an eminently religious philosophy, and its natural tendencies were still further strengthened at the period of its revival by the great religious reaction which we have been studying in the present chapter; while, conversely, in the struggle for supremacy among rival systems, its affinities with the spirit of the age gave it an immense advantage over the sceptical and materialistic philosophies, which brought it into still closer sympathy with the currents of popular opinion. And its partisans were drawn even further in the same direction by the influence of Neo-Pythagoreanism, representing, as this did, one among the three or four leading principles which Plato had attempted to combine.

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FORE:"I am not very easily impressed," she said, "and as to that Spanish woman--eh, Dr. Bruce must have been taking lessons from Mr. Lawrence."

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THREE:

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A pressure wheel, like a steam-engine, must include running contact between water-tight surfaces, and like a rotary steam-engine, this contact is between surfaces which move at different rates of speed in the same joint, so that the wear is unequal, and increases as the speed or the distance from the axis. When it is considered that the most careful workmanship has never produced rotary engines that would surmount these difficulties in working steam, it can hardly be expected they can be overcome in using water, which is not only liable to be filled with grit and sediment, but lacks the peculiar lubricating properties [41] of steam. A rotary steam-engine is in effect the same as a pressure water-wheel, and the apprentice in studying one will fully understand the principles of the other.3. A knowledge of specific conditions, such as strains, the range and rate of movements, and so on.Before leaving we went back to the hotel for breakfast. Thereit was a first-class hotelthey gave us an apology for coffee, without milk or sugar, and two flimsy pieces of bread, as hard as wood and as black as shoe-polish. I was intensely hungry, and as nowhere at Charleroi anything else could be had, I did my best with the wooden bread and succeeded in washing it down with much chewing and jawing. But the sweet, hard stuff did not suit my digestion, and I felt ill already when at six o'clock we got into the motor-car and left for Dinant.And Isidore pulled at his cigar thoughtfully. He seemed so strong and confident that Hetty was strangely comforted.
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