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The means of supporting cores must be devised, or at least understood, by pattern-makers; these supports consist of 'prints' and 'anchors.' Prints are extensions of the cores, which project through the casting and extend into the sides of the mould, to be held by the sand or by the flask. The prints of cores have duplicates on the patterns, called core prints, which are, or should be, of a different colour from the patterns, so as to distinguish one from the other. The amount of surface required to support cores is dependent upon their weight, or rather upon their cubic contents, because the weight of a core is but a trifling matter [96] compared to its floating force when surrounded by melted metal. An apprentice in studying devices for supporting cores must remember that the main force required is to hold them down, and not to bear their weight. The floating force of a core is as the difference between its weight and that of a solid of metal of the same sizea matter moulders often forget to consider. It is often impossible, from the nature of castings, to have prints large enough to support the cores, and it is then effected by anchors, pieces of iron that stand like braces between the cores and the flasks or pieces of iron imbedded in the sand to receive the strain of the anchors. このページの先頭です
ONE:As they moved slowly along Larry, fending off a clump of tough grass into which the breeze sought to drift their rubber shell, caught sight of something dimly white, far in among the muddy grass roots.
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ONE:"I'm not a patient man," Lawrence muttered, "but I could manage with a cigarette. Under the circumstances, perhaps I had better not."
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TWO:We can try to drop down into the fog, called Larry to Dick as their pilot, with closed throttle, nosed down to get closer to the scene of the tragedy.

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TWO:2. The connection between the hammer drop and valve cannot be positive, but must be broken during the descent of the drop.

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TWO:"Why should I have killed him?" was the cool response. "At the rate he was going he would have drunk himself to death in another week."

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TWO:Jeff drew a bulky, registered envelope from his coat, displayed the registration stamps and marks, and his name and address typed on the envelope. Drawing out a half dozen hand written sheets in a large masculine fist, he showed the signature of Atley Everdail at the end.

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TWO:"Ah, so you are a Netherlander, aren't you? Then we are friends. The Netherlands remains neutral, does she not? What news have you from there; are you already at war with Britain?"
THREE:We have here, also, the secret of that elaborate machinery devised for the very unnecessary purpose of converting syllogisms of the second and third figure into syllogisms of the first, which is one of the Stagirites principal contributions to logic. For it is only in the first figure that the notion by which the extremes are either united or held apart is really a middle term, that is to say, really comes between the others. The distinction between perfect and imperfect syllogisms also serves to illustrate Aristotles systematic division between the necessary and the contingent. The method of proof by inclusion corresponds in its unconditioned and independent validity to the concentric arrangement of the supernal spheres; the second and third figures, with their conversions and reductions, to the sublunary sphere in its helpless dependence on380 the celestial revolutions, and its transformations of the elements into one another."One more question and I have done," said Prout. "Your brother had some one to fear. Now was that some one a man or a woman?"
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THREE:There is, however, this to be remembered, that the considerations which more especially balance premiumssuch as a term at draughting, designing, and office servicemay be mainly acquired by self-effort, while the practical knowledge of moulding, forging, and fitting cannot; and an apprentice who has good natural capacity, may, if industrious, by the aid of books and such opportunities as usually exist, qualify himself very well without including the premium departments in his course.