THREE:I think proper to point out these peculiarities, not so much from any importance they may have in themselves, but to suggest critical investigation, and to dissipate any preconceived opinions of forging being a simple matter, easy to learn, and involving only commonplace operations.A true movement of carriages is dependent upon the amount or wearing power of their bearing surface, how this surface is disposed in reference to the strain to be resisted, and the conditions under which the sliding surfaces move; that is, how kept in contact. The cutting strain which is to be mainly considered, falls usually at an angle of thirty to forty degrees downward toward the front, from the centre of the lathe. To resist such strain a flat top shear presents no surface at right angles to the strain; the bearings are all oblique, and not only this, but all horizontal strain falls on one side of the shear only; for this reason, flat top shears have to be made much heavier than would be required if the sum of their cross section could be employed to resist transverse strain. This difficulty can, however, be mainly obviated by numerous cross girts, which will be found in most lathe frames having flat tops.
FORE:In his criticism on the ideal theory, Aristotle argues that it is unproved; that the consequences to which it leads would be rejected by the idealists themselves; that it involves a needless addition to the sum of existence; that it neither explains the origin of things nor helps us to understand them, while taking away from them their substantial reality; that the Ideas are merely sensible objects hypostasised, like the anthropomorphic divinities of primitive men; that, to speak of them as patterns, in whose likeness the world was created, is a mere idle metaphor; that, even assuming the existence of such patterns, each individual must be made in the likeness, not of one, but of many ideasa human being, for instance, must be modelled after the ideal biped and the ideal animal, as well as after the ideal man; while many of the ideas themselves, although all are supposed to exist absolutely, must be dependent on other and simpler types; finally, that, assuming an idea for every abstract relation, there must be ideas to represent the relation between every sensible object and its prototype, others for the new relations thus introduced, and so on to infinity.
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FORE:(1.) What should determine the social rank of industrial callings?(2.) Why have the physical sciences and mechanic arts achieved so honourable a position?(3.) How may the general object of the engineering arts be described?(4.) What is the difference between science and art as the terms are generally employed in connection with practical industry?
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FORE:Still, it was just as well to be on the safe side. There must be no suspicion that there had been any foul play here.
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