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TWO:41Attention 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.

Distillation equipment01

Distillation equipment02

THREE:"Where's the sense in making that noise?" Balmayne growled. "Why didn't you bring your latchkey as I suggested, instead of leaving the front door open? Some zealous policeman found it open and rang the servants up."She broke off, her voice rose to a scream. She grew whiter far than the linen about her shoulders. Balmayne laid his hand on her mouth in an instant.
FORE:"More for the sake of others you shall get it," Lawrence cried. "It's flattering to the vanity of a novelist to have a millionaire for one of his puppets."Charlton complied without enthusiasm. In a few days he was going to have everything in the Corner House sold, and subsequently dispose of the property altogether. It was a little after four o'clock that he put his key in the latch, and the two entered. A casual glance did not disclose any marks of occupation, but there were traces of food in the kitchen and some utensils had evidently been used.

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FORE:"Perhaps we could get it now." Hetty smiled.Considered as means for transmitting power, the contrast as to advantages and disadvantages lies especially between belts and gearing instead of between belts and shafts. It is true in extreme cases, such as that cited at Crewe, or in conveying water-power from inaccessible places, through long distances, the comparison lies between belts and shafts; but in ordinary practice, especially for first movers, the problem as to mechanism for conveying power lies between belts and gear wheels. If experience in the use of belts was thorough, as it is in the case of gearing, and if the quality of belts did not form so important a part in the estimates, there would be but little difficulty in determining where belts should be employed and where gearing would be preferable. Belts are continually taking the place of gearing even in cases where, until quite recently, their use has been considered impracticable; one of the largest rolling mills in Pittsburg, Pennsylvania, except a single pair of spur wheels as the last movers at each train of rolls, is driven by belts throughout.

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FORE:"I thought, perhaps," Bruce began, "that my name----"She was horribly frightened. If she could only have seen her antagonist it would have been bearable. But she was fighting shadows. Whichever way she turned she found herself checkmated and beaten.

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