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    Software name: appdown
    Software type: Microsoft Framwork

    size: 344MB

    Lanuage:Englist

    Software instructions

      The arrangement of patterns with reference to having certain parts of castings solid and clean is an important matter, yet one that is comparatively easy to understand. Supposing the iron in a mould to be in a melted state, and to contain, as it always must, loose sand and 'scruff,' and that the weight of the dirt is to melted iron as the weight of cork is to water, it is easy to see where this dirt would lodge, and where it would be found in the castings. The top of a mould or cope, as it is called, contains the dirt, while the bottom or drag side is generally clean and sound: the rule is to arrange patterns so that the surfaces to be finished will come on the bottom or drag side.


      It has been already remarked that the boldness of young engineers is very apt to be inversely as their experience, not to say their want of knowledge, and it is only by a strong and determined effort towards conservatism, that a true balance is maintained in judging of new schemes.


      On the afternoon of the 23rd the hostile troops entered the town, and on that day the inhabitants had not to suffer, excepting from requisitions made. But the following evening it was suddenly on fire at various spots, and the soldiers began to shoot in all directions, making many victims. Before setting the houses on fire, with a liberal use of the lozenges mentioned already, the usurpers ransacked them and removed numerous pieces of valuable furniture. The Place d'Armes, the Place Lopold, the Rue St. Nicolas, Rue Rogier, and the Avenue de la Plante were almost entirely reduced to ashes. With the town-hall many valuable pictures were destroyed. The day following the conflagration they left off shooting at last, but the looting went on for days more.

      It was a fine summer afternoon, and the sun shone on the many bright, whitewashed walls of the old and neat little town, built close to the rapidly flowing river. There was quiet in the streets, although nearly all the inhabitants were sitting on their chairs in the streets. But nobody ventured to move about, and conversations were held only in whispers. As I walked through the village street in my quaint get-up, they pushed their chairs a little closer together as if frightened, and looked shyly at me as if they feared that I was not the harbinger of much good. And all these hundreds of people saluted me humbly, almost cringingly, which filled me with pity.

      "Oh yes, it has been destroyed already a couple of times, but we shall teach them a lesson! Why did not the Belgians allow us to pass through their country? What can their little army do against us? As soon as a sufficient number have crossed we shall go for these forts, then on to Brussels, and within a fortnight we shall be in Paris. Lige we have taken already."


      It was a chilly night, and a dense heavy fog made it impossible to see anything.... My "bed-fellows" raged and fumed at me, saying that I was one of those villains who had treacherously shot at them. I shivered from the cold, and felt, as it were,128 the dampness of the wet stone floor entering my system.

      Labourers were called up to assist in reinforcing the conquered forts on the left bank of the Meuse, the forts which by and by might be used to shell their fellow-countrymen, in case the Germans should be forced to retire. Nobody will have offered himself for this work voluntarily, the less so as the proclamation wound up as follows:

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      The town was on fire, and ruddy smoke hovered over it. Deserted like a wilderness, not a soul moved in the streets. The first street I entered was the Rue de la Station. Large, imposing mansions used to stand here, but the devouring fire consumed even the last traces of former greatness.Cylindrical parts in the plane of sections, such as shafts and bolts, should be drawn full, and have a 'round shade,' which relieves the flat appearancea point to be avoided as much as possible in sectional views.

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      They did not understand, of course, that poor Belgium would have liked nothing better than to remain neutral also.And over these nervous and terrified thousands at Maastricht rolled from afar the dull roar of the guns, thunder-like bursts from which had frightened them so terribly.

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      A second point to be noticed in hammers of this class is the nature of the connection with the driving power. In all cases there will be found an equivalent for the elastic helve of the trip-hammereither air cylinders, deflecting springs, or other yielding attachments,interposed between the crank and the hammer-head, also a slipping frictional belt or frictional clutches for driving, as in the case of trip-hammers.


      alllittle