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As a means for transmitting power, shafts afford the very important advantage that power can be easily taken off at any point throughout their length, by means of pulleys or gearing, also in forming a positive connection between the motive-power and machines, or between the different parts of machines. The capacity of shafts in resisting torsional strain is as [46] the cube of their diameter, and the amount of torsional deflection in shafts is as their length. The torsional capacity being based upon the diameter, often leads to the construction of what may be termed diminishing shafts, lines in which the diameter of the several sections are diminished as the distance from the driving power increases, and as the duty to be performed becomes less. This plan of arranging line shafting has been and is yet quite common, but certainly was never arrived at by careful observation. Almost every plan of construction has both advantages and disadvantages, and the best means of determining the excess of either, in any case, is to first arrive at all the conditions as near as possible, then form a "trial balance," putting the advantages on one side and the disadvantages on the other, and footing up the sums for comparison. Dealing with this matter of shafts of uniform diameter and shafts of varying diameter in this way, there may be found in favour of the latter plan a little saving of material and a slight reduction of friction as advantages. The saving of material relates only to first cost, because the expense of fitting is greater in constructing shafts when the diameters of the different pieces vary; the friction, considering that the same velocity throughout must be assumed, is scarcely worth estimating.

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Jeff, the so-called Mr. Everdail, and the pilot and passenger of the seaplane, as well as the presumably injured man whom they had not seenall these were members of an international band of robbers, Sandy claimed.When I got to the house everything was in a frightful state. A pair of curtains showed traces of fire; cupboards had been emptied, and nearly all the china and glass broken; statuary lay broken on the floor; windows were smashed; bits of bricks and plaster from the ceilings, through which many shots had been fired, completed the scene of destruction. On the doorstep I picked up a cartridge-case, which I have always kept, because it is highly probable that it had contained the bullet which killed Mrs. Poswick.
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THREE: FORE:"Is that really a fact?" Bruce cried.

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FORE:But who would want to destroy them? Dick wondered."That is just what I should like to do," Lawrence said coolly.
FORE:Presuming an engineering establishment to consist of one-storey buildings, and the main operations to be conducted on the ground level, the only vertical lifting to be performed will be in the erecting room, where the parts of machines are assembled. This room should be reached in every part by over-head travelling cranes, that cannot only be used in turning, moving, and placing the work, but in loading it upon cars or waggons. One result of the employment of over-head travelling cranes, often overlooked, is a saving of floor-room; in ordinary fitting, from one-third more to twice the number of workmen will find room in an erecting shop if a travelling-crane is employed, the difference being that, in moving pieces they may pass over the top of other pieces instead of requiring long open passages on the floor. So marked is this saving of room effected by over-head cranes, that in England, where they are generally employed, handling is not only less expensive and quicker, but the area of erecting floors is usually one-half as much as in America, where travelling-cranes are not employed.
FORE:A proof of this proposition is furnished in the case of standard machine tools for metal-cutting, a class of machinery that for many years past has received the most thorough attention at the hands of our best mechanical engineers.Were it not that moral influences in learning mechanics, as in all other kinds of education, lie at the bottom of the whole matter, the subject of this chapter would not have been introduced. But it is the purpose, so far as possible, to notice everything that concerns an apprentice and learner, and especially what he has to deal with at the outset; hence some remarks upon the nature of apprentice engagements will not be out of place. To acquire information or knowledge of any kind successfully and permanently, it must be a work of free volition, as well as from a sense of duty or expediency; and whatever tends to create love and respect for a pursuit or calling, becomes one of the strongest incentives for its acquirement, and the interest taken by an [19] apprentice in his business is for this reason greatly influenced by the opinions that he may hold concerning the nature of his engagement.
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308All existence, according to Plotinus, proceeds from the One, which he also calls God. But God does not create the world by a conscious exercise of power; for, as we have seen, every form of consciousness is excluded from his definition.319 Neither does it proceed from him by emanation, for this would imply a diminution of his substance.469 It is produced by an overflow of his infinite power.470 Our philosopher tries to explain and defend this rather unintelligible mode of derivation by the analogy of physical substances and their actions. Light is constantly coming from the sun without any loss to the luminary itself.471 And all things are, in like manner, constantly communicating their proper virtue to others while remaining unaltered themselves. Here we have a good example of the close connexion between science and abstract speculation. People often talk as if metaphysics was something beyond the reach of verification. But some metaphysical theories admit, at any rate, of disproof, in so far as they are founded on false physical theories. Had Plotinus known that neither the sun nor anything else in Nature can produce force out of nothing, he would, very probably, have hesitated to credit the One with such a power.When we entered the town in our motor-car, those of the unfortunate population who had escaped from the murderous massacre had already left the town. Between the ruins and the deserted French Red Cross cars we drove to the pontoon bridge which the Germans had flung across the river by the side of the Meuse bridge, which had been blown up. Here we were stopped by German soldiers who guarded the pontoon bridge. In a caf we came across a few of the citizens who had remained. These unfortunate people had no home, no money, and no food, lacked the wherewithal to go farther away, and now depended on the charity of the murderers of their relatives. Twice a day they were allowed to call at one of the German stores for a piece of bread, in exchange for a ticket which167 they might get at the commander's office. The Germans, upholders of morality and "Kultur," saw to it that their victims did not overeat themselves.
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