Show WELDING WITH ALUMINUM new process recently invented in germany ens has several advantages over old welding a new process evs in vented in germany basded on the intense heat produced by the comb combustion ution of al at promises to nal a e pe estly casy tha perfo mance of oie actions he ro tolore pos ble oil c by aid 0 of the electr c furnace and still others to which the metric furnace fur nce cannot be conveniently applied literally tran with heat Is the name applied by its inventor to a mixture 0 of alami gium and oxide of iron in a grant granular gra nilar jar state and in chemical proportion this mixture cannot be ignited by 0 ordinary adina ry means it may be stirred with a red hot bar of iron or thrown into a fire or mol ten cast iron may be pour d on it without ca causing tsing ignition but it if even a small portion of 0 the be raised to a tern t pe pera ture nearly approaching that of molten steel the tle chemical affinity cf the alun ilium for the oxygen contained con tined in chef the tn ril i oxide is powerfully de den eloped with the result that metallic iron and oxide of aluminium al ali are produced cei the conversion i being attil attai ed at a heat of 3 degrees centigrade joints made with are far stiffer than tho wade trade in the usual manner according to tests made in europe and in the con cot on of trolley lines prove probe perfect electrical conductors conduct oris and gi give ve a r rail all joint smoother than heretofore possible thus adding to the life et of roadbed and railing stock |