Railway and Locomotive Engineering . ime. One pound pure monest form is the material used in arclight electrodes, and this substance, aswell as lime, stands extremely high tem-peratures, and it is, as we have alreadystated, by the very high temperature at-tainable by the electric furnace that causesthe fusion of the substances and makes 254 RAILWAY AND LOCOMOTIVE ENGINEERING. August, 1916. possible the formation of the to the exact properties ofacet>lene, it is composed of twenty-fourparts of carbon and two parts of hydro-gen in weight This percentage of carbonis the highest
Railway and Locomotive Engineering . ime. One pound pure monest form is the material used in arclight electrodes, and this substance, aswell as lime, stands extremely high tem-peratures, and it is, as we have alreadystated, by the very high temperature at-tainable by the electric furnace that causesthe fusion of the substances and makes 254 RAILWAY AND LOCOMOTIVE ENGINEERING. August, 1916. possible the formation of the to the exact properties ofacet>lene, it is composed of twenty-fourparts of carbon and two parts of hydro-gen in weight This percentage of carbonis the highest known to in a Rascousform. Carbon may l>e said to hv the basicform of all matter that is coinbusiiblc andis present in all fuels. In fuel gasesacetylene is the most powerful, and henceits possibility to the development of thehottest flame when harnessed in a ignition point is about 900 degreesFah., coal gas being about 1,100 degree of purity to which it has at-tained during recent years by the careful. mospheres renders acetylene possible ofself-ignition, and the danger increases ina ratio to the pressure. With the presenceof acetone, acetylene loses this danger-ous quality, and can be safely handled,the only remaining danger being tliat asthe acetylene is dissolved the acetone in-creases its volume, and as the gas isdrawn out of a closed tank the space leftis full of free acetylene. This new dangeris removed by tilling the tank with someporous substance, asbestos being the mostcommon in general practice. The acetylene gas then dissolved andprotected is forced into portable contain-ers at a pressure of 150 pounds per squareinch, for the use of consumers. The quan-tity remaining enclosed may be readilyascertained by knowing the weight of theempty cylinder and noting the differencebetween that amount and the weight ofthe cylinder containing the gas, one poundof which occupies about 14/. cubic feet. The complete equrpment of present daypractice incl
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