THREE:Attention has been called to this case as one wherein the conditions of operation obviously furnish true data to govern the arrangement of machinery, instead of the determinable strains to which the parts are subjected, and as a good example of the importance of studying mechanical conditions from a practical and experimental point of view. If the general diameter of a shaft is based upon the exact amount of power to be transmitted, or if the diameter of a shaft at various parts is based upon the torsional stress that would be sustained at these points, such a shaft would not only fail to meet the conditions of practical use, but would cost more by attempting such an adaptation. The regular working strain to which shafts are subjected is inversely as the speed at which they run. This becomes a strong reason in favour of arranging shafts to run at a maximum speed, provided there was nothing more than first cost to consider; but there are other and more important conditions to be taken into account, principal among which are the required rate of movement where power is taken off to machines, and the endurance of bearings.Next day I was already back in Lige, where much was changed after my last visit. The Germans went on terrorising the inhabitants, and these, being extremely frightened, looked with suspicion at every stranger. In the streets was the smoke of burning houses, especially from Outre-Meuse.
THREE:Leona Lalage laughed aloud. The touch of those cool fingers thrilled her. To go away now, to abandon it all just when----. Ah, the thing was impossible. She might just as well have cast herself off Waterloo Bridge.
THREE:CHAPTER XXXIV. A CLEVER MOVE.
THREE:
THREE:The contents of the present work, except the Introduction and the chapter on Gauges, consist mainly in a revision of a series of articles published in "Engineering" and the Journal of the Franklin Institute, under the head of "The Principles of Shop Manipulation," during 1873 and 1874.