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FORE:

FORE:69(1.) How may gauging implements affect the division of labour?��(2.) In what way do standard dimensions affect the value of machinery?��(3.) Why cannot cylindrical joints be fitted by trying them together?��(4.) Under what circumstances is it most important that the parts of machinery should have standard dimensions?��(5.) Which sense is most acute in testing accurate dimensions?��(6.) How may slight variations in dimensions be made apparent to sight?

FORE:Before the ideas which we have passed in review could go forth on their world-conquering mission, it was necessary, not only that Socrates should die, but that his philosophy should die also, by being absorbed into the more splendid generalisations of Plato��s system. That system has, for some time past, been made an object of close study in our most famous seats of learning, and a certain acquaintance with it has almost become part of a liberal education in England. No170 better source of inspiration, combined with discipline, could be found; but we shall understand and appreciate Plato still better by first extricating the nucleus round which his speculations have gathered in successive deposits, and this we can only do with the help of Xenophon, whose little work also well deserves attention for the sake of its own chaste and candid beauty. The relation in which it stands to the Platonic writings may be symbolised by an example familiar to the experience of every traveller. As sometimes, in visiting a Gothic cathedral, we are led through the wonders of the more modern edifice��under soaring arches, over tesselated pavements, and between long rows of clustered columns, past frescoed walls, storied windows, carven pulpits, and sepulchral monuments, with their endless wealth of mythologic imagery��down into the oldest portion of any, the bare stern crypt, severe with the simplicity of early art, resting on pillars taken from an ancient temple, and enclosing the tomb of some martyred saint, to whose glorified spirit an office of perpetual intercession before the mercy-seat is assigned, and in whose honour all that external magnificence has been piled up; so also we pass through the manifold and marvellous constructions of Plato��s imagination to that austere memorial where Xenophon has enshrined with pious care, under the great primary divisions of old Hellenic virtue, an authentic reliquary of one standing foremost among those who, having worked out their own deliverance from the powers of error and evil, would not be saved alone, but published the secret of redemption though death were the penalty of its disclosure; and who, by their transmitted influence, even more than by their eternal example, are still contributing to the progressive development of all that is most rational, most consistent, most social, and therefore most truly human in ourselves."Tongres.

FORE:Following this proposition into modern engineering examples, we find how practice has gradually conformed to what these properties in belts suggest. Wire and other ropes of small diameter, to avoid air friction, and allowed to droop in low curves to avoid too many supporting pulleys, are now in many cases employed for transmitting power through long distances, as at Schaffhausen, in Germany. This system has been very successfully applied in some cases for distributing power in large manufacturing establishments. Belts, among which are included all flexible bands, do not afford the same facilities for [49]taking off power at different points as shafts, but have advantages in transmitting power to portable machinery, when power is to be taken off at movable points, as in the case of portable travelling cranes, machines, and so on.

FORE: