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    Software name: appdown
    Software type: Microsoft Framwork

    size: 633MB

    Lanuage:Englist

    Software instructions

      Hetty ceased to speak for a moment. The recollection of what she had gone through overcame her. Bruce kissed her tenderly.


      At Eerneghem we were not only stopped, but also sent back outright. It was considered extremely impudent on our side that we had dared to push246 on so far, because we were in the fighting-line. Even the permit given by the commander of Thourout was of no avail.


      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.J. R.

      One of the peculiarities of trip-hammers as machines is the mechanical difficulties in connecting them with the driving power, especially in cases where there are a number of hammers to be driven from one shaft.


      In a caf, lower down, near the canal I saw a number of German soldiers, and was successful in having a chat with the inn-keeper, at the farthest corner of the bar. I asked him, of course, what they meant by burning the village, and he told me that the Germans had made a number of unsuccessful attacks on Fort Pontisse, until at last they reduced it to silence. They were now so near that they could open the final assault. They were afraid, however, of some ambush, or underground mine, and the Friday before they had collected the population, whom they forced to march in front of them. When they had got quite near they dared not enter it yet, and drove the priest and twelve of the principal villagers before them. That is how Pontisse was conquered.

      "I will do anything I can to make your mind easy," Hetty said.Sandy turned away, hurt, and strolled to the amphibian with its retractable wheels for land use and its pontoons for setting down on water.

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      "What! A Netherlander? I suppose you come to see how many troops are here, don't you? And then...."

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      The fog was thinning under them, blowing aside, swirling, shifting.

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      There is, however, this to be remembered, that the considerations which more especially balance premiumssuch as a term at draughting, designing, and office servicemay be mainly acquired by self-effort, while the practical knowledge of moulding, forging, and fitting cannot; and an apprentice who has good natural capacity, may, if industrious, by the aid of books and such opportunities as usually exist, qualify himself very well without including the premium departments in his course.The term planing should properly be applied only to machines that produce planes or flat surfaces, but the technical use of the term includes all cutting performed in right lines, or by what may be called a straight movement of tools.


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