• sitemap?JbhpM.xml
  • sitemap?NPFNj.xml
  • sitemap?i40Ud.xml
  • sitemap?KvixI.xml
  • sitemap?ofNGm.xml
  • sitemap?uPQ16.xml
  • sitemap?hzH97.xml
  • sitemap?pvjZf.xml
  • sitemap?xppez.xml
  • loading
    Software name: appdown
    Software type: Microsoft Framwork

    size: 759MB

    Lanuage:Englist

    Software instructions

      "Leave everything to me; I'll invite them to have a glass of wine with me, and you will see then that they are kind people."


      Before I got there I passed the Halls of Louvain, the building that contained the world-famous library, with its numerous art-treasures. Only the outer walls were left standing, inside it was all ruins. All was reduced to dust, to miserable rubbish, and never will one single page be recovered of all those thousands of burned manuscripts.Presuming the vertical shaft and the horizontal arms of a Barker wheel to be filled with water under a head of sixteen feet, there would be a pressure of about seven pounds upon each superficial inch of surface within the cross arm, exerting an equal force in every direction. By opening an orifice at the sides of these arms equal to one inch of area, the pressure would at that point be relieved by the escape of the water, and the internal [40] pressure be unbalanced to that extent. In other words, opposite this orifice, and on the other side of the arm, there would be a force of seven pounds, which being unbalanced, acts as a propelling power to drive the wheel.


      Matters stood so in Lige on the morning of August 9th, when the second day of the occupation by the Germans had not yet passed. The Belgian field army, which had bravely defended the ground under the protection of the forts, and inflicted heavy losses upon the Germans, had to retreat before their superior numbers, leaving the further defence of the Meuse to the forts. But a high price had been paid for Lige, for the German losses were immense, and on the ninth they were still busy burying their dead. The Germans lost many men, especially near Lixhe and the Forts Bachon and Fleron.

      "Certainly, captain; as a matter of fact we are of the same race."I could not stop there long, for I was actually within range. I saw a number of shells explode and twice hit a farmhouse, which was destroyed for the greater part. So I returned as quickly as possible to my little protge, and went on with her, following the road as far as the canal, and then along this to Maastricht.

      It is not proposed at this time to treat of the construction of machinery for transmitting power, but to examine into the conditions that should determine which of the several plans of transmitting is best in certain caseswhether belts, gearing, or shafts should be employed, and to note the principles upon which they operate. Existing examples do not furnish data as to the advantages of the different plans for transmitting power, because a given duty may be successfully performed by belts, gearing, or shaftseven by water, air, or steamand the comparative advantages of different means of transmission is not always an easy matter to determine.The latter seems a plausible theory, and perhaps a correct one; but there are two facts in connection with the operation of reaction water-wheels which seem to controvert the latter and favour the first theory, namely, that reaction wheels in actual practice seldom utilise more than forty per cent. of useful effect from the water, and that their speed may exceed the initial velocity of the water. With this the subject is left as one for argument or investigation on the part of the reader.


      This problem of whether to move the material or to move the tools in planing, is an old one; both opinion and practice vary to some extent, yet practice is fast settling down into constant rules.

      Fourth. The arrangement of the parts of a combination machine have to be modified by the relations between them, instead of being adapted directly to the work to be performed.

      downloads

      The means of supporting cores must be devised, or at least understood, by pattern-makers; these supports consist of 'prints' and 'anchors.' Prints are extensions of the cores, which project through the casting and extend into the sides of the mould, to be held by the sand or by the flask. The prints of cores have duplicates on the patterns, called core prints, which are, or should be, of a different colour from the patterns, so as to distinguish one from the other. The amount of surface required to support cores is dependent upon their weight, or rather upon their cubic contents, because the weight of a core is but a trifling matter [96] compared to its floating force when surrounded by melted metal. An apprentice in studying devices for supporting cores must remember that the main force required is to hold them down, and not to bear their weight. The floating force of a core is as the difference between its weight and that of a solid of metal of the same sizea matter moulders often forget to consider. It is often impossible, from the nature of castings, to have prints large enough to support the cores, and it is then effected by anchors, pieces of iron that stand like braces between the cores and the flasks or pieces of iron imbedded in the sand to receive the strain of the anchors.

      downloads

      In a meadow east of the city I saw three big guns mounted, the biggest I had seen as yet. They kept up a continuous and powerful cannonade at the forts near the town, that had not yet been taken. There were three of them left, of which Loncin was the most important.

      downloads


      CHAPTER XLI. WORKSHOP EXPERIENCE.Was the gun I had seen there one of the notorious forty-two centimetre monsters? I should not like to wager my head in affirming that. It was an inordinately unwieldy and heavy piece of ordnance, but during the first days of the war nothing or very little had yet been said or written about these forty-two's, and I did not pay sufficient attention to the one I saw. Only after the fall of Loncin did all those articles about the forty-two's appear in the papers, and the Germans certainly asserted that they destroyed Loncin by means of such a cannon.


      alllittle