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FORE:It may be noticed that the carriages of some lathes move on what are termed V tracks which project above the top of lathe frames, and that in other lathes the carriages slide on top of the frames with a flat bearing. As these two plans of mounting lathe carriages have led to considerable discussion on the part of engineers, and as its consideration may suggest a plan of analysing other problems of a similar nature, I will notice some of the conditions existing in the two cases, calling the different arrangements by the names of flat shears and track shears.

FORE:

FORE:

FORE:These rules apply to forging, but in a different way from other processes. Unlike pattern-making or casting, the general processes in forging are uniform; and still more unlike pattern-making or casting, there is a measurable uniformity in the articles produced, at least in machine-forging, where bolts, screws, and shafts are continually duplicated.

FORE:It is best, when an apprentice thinks of entering an engineering establishment, to inquire of its character from disinterested persons who are qualified to judge of the facilities it affords. As a rule, every machine-shop proprietor imagines his own establishment to combine all the elements of an engineering business��and the fewer the facilities for learners, usually the more extravagant this estimate; so that opinions in the matter, [24] to be relied upon, should come from disinterested sources.In the driving gearing of planing machines, conditions which favour the reversing movement are high speed and narrow driving belts. The time in which belts may be shifted is as their speed and width; to be shifted a belt must be deflected or bent edgewise, and from this cause wind spirally in order to pass from one pulley to another. To bend or deflect a belt edgewise there will be required a force in proportion to its width, and [133] the time of passing from one pulley to another is as the number of revolutions made by the pulleys.

FORE:

FORE:An additional influence, not the less potent because unacknowledged, was the same craving for a principle of unity that had impelled early Greek thought to seek for the sole substance or cause of physical phenomena in some single material element, whether water, air, or fire; and just as these various principles were finally decomposed into the multitudinous atoms of Leucippus, so also, but much more speedily, did the general principle of knowledge tend to decompose itself into innumerable cognitions of the partial ends or utilities which action was directed to achieve. The need of a comprehensive generalisation again made itself felt, and all good was summed up under the head of happiness. The same difficulties recurred under another form. To define happiness proved not less difficult than to define use or practical knowledge. Three points of view offered themselves, and all three had been more or less anticipated by Socrates. Happiness might mean unmixed pleasure, or the exclusive cultivation of man��s higher nature, or voluntary subordination to a larger whole. The founder of Athenian philosophy used to present each of these, in turn, as an end, without recognising the possibility of a conflict between134 them; and it certainly would be a mistake to represent them as constantly opposed. Yet a truly scientific principle must either prove their identity, or make its choice among them, or discover something better. Plato seems to have taken up the three methods, one after the other, without coming to any very satisfactory conclusion. Aristotle identified the first two, but failed, or rather did not attempt to harmonise them with the third. Succeeding schools tried various combinations, laying more or less stress on different principles at different periods, till the will of an omnipotent Creator was substituted for every human standard. With the decline of dogmatic theology we have seen them all come to life again, and the old battle is still being fought out under our eyes. Speaking broadly, it may be said that the method which we have placed first on the list is more particularly represented in England, the second in France, and the last in Germany. Yet they refuse to be separated by any rigid line of demarcation, and each tends either to combine with or to pass into one or both of the rival theories. Modern utilitarianism, as constituted by John Stuart Mill, although avowedly based on the paramount value of pleasure, in admitting qualitative differences among enjoyments, and in subordinating individual to social good, introduces principles of action which are not, properly speaking, hedonistic. Neither is the idea of the whole by any means free from ambiguity. We have party, church, nation, order, progress, race, humanity, and the sum total of sensitive beings, all putting in their claims to figure as that entity. Where the pursuit of any single end gives rise to conflicting pretensions, a wise man will check them by reference to the other accredited standards, and will cherish a not unreasonable expectation that the evolution of life is tending to bring them all into ultimate agreement.The lenses brought the stern and after cabin into view.

FORE:

FORE:Machines are composed of parts connected together by rigid and movable joints; rigid joints are necessary because of the expense, and in most cases the impossibility, of constructing framing and other fixed detail in one piece.He was quite upset, and evidently thought that the best plan was to muzzle me by taking me away from the others as quickly as possible.

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