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FORE:There was no sign of a servant to be seen anywhere. They had all packed up their boxes, and fled, as rats quit a sinking ship."The Commanding Officer,

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FORE:Cores are employed mainly for what may be termed the displacement of metal in moulds. There is no clear line of distinction between cores and moulds, as founding is now conducted; cores may be of green sand, and made to surround the exterior of a piece, as well as to make perforations or to form recesses within it. The term 'core,' in its technical sense, means dried moulds, as distinguished from green sand. Wheels or other castings are said to be cast in cores when the moulds are made in pieces and dried. Supporting and venting cores, and their expansion, are conditions to which especial attention [95] is called. When a core is surrounded with hot metal, it gives off, because of moisture and the burning of the 'wash,' a large amount of gas which must have free means of escape. In the arrangement of cores, therefore, attention must be had to some means of venting, which is generally attained by allowing them to project through the sides of the mould and communicate with the air outside.

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FORE:The safety, simplicity, and reliable action of hydraulic machinery has already led to its extensive employment for moving and lifting weights, and it is fair to assume that the importance and success of this invention fully entitle it to be classed as one of the most important that has been made in mechanical engineering during fifty years past. The application of hydraulic force in operating the machinery used in the processes for steel Bessemer manufacture, is one of the best examples to illustrate the advantages and principles of the hydraulic system. Published drawings and descriptions of Bessemer steel plant explain this hydraulic machinery.

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FORE:328CHAPTER XXXIII. SHAPING MACHINES.

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FORE:No sooner did the two imperial systems lose their ascendency than the germs which they had temporarily overshadowed sprang up into vigorous vitality, and for more than4 five centuries dominated the whole course not only of Greek but of European thought. Of these by far the most important was the naturalistic idea, the belief that physical science might be substituted for religious superstitions and local conventions as an impregnable basis of conduct. In a former chapter1 we endeavoured to show that, while there are traces of this idea in the philosophy of Heracleitus, and while its roots stretch far back into the literature and popular faith of Greece, it was formulated for the first time by the two great Sophists, Prodicus and Hippias, who, in the momentous division between Nature and Law, placed themselves��Hippias more particularly��on the side of Nature. Two causes led to the temporary discredit of their teaching. One was the perversion by which natural right became the watchword of those who, like Plato��s Callicles, held that nothing should stand between the strong man and the gratification of his desire for pleasure or for power. The other was the keen criticism of the Humanists, the friends of social convention, who held with Protagoras that Nature was unknowable, or with Gorgias that she did not exist, or with Socrates that her laws were the secret of the gods. It was in particular the overwhelming personal influence of Socrates which triumphed. He drew away from the Sophists their strongest disciple, Antisthenes, and convinced him that philosophy was valuable only in so far as it became a life-renovating power, and that, viewed in this light, it had no relation to anything outside ourselves. But just as Socrates had discarded the physical speculations of former teachers, so also did Antisthenes discard the dialectic which Socrates had substituted for them, even to the extent of denying that definition was possible.2 Yet he seems to have kept a firm hold on the two great ideas that were the net result of all previous philosophy, the idea of a cosmos, the common citizenship of which made all men5 potentially equal,3 and the idea of reason as the essential prerogative of man.4

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FORE:With wind unchanged the trees which had complicated their landing were behind them. Jeff��s only problem, Larry saw, was to get the craft, heavier with its wing tanks full, off the short runway and over the hangar.

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