Show tungsten nearly everybody Is familiar with the tungsten filament electric lamp but few are aware aware that the filaments which give so effective a light are made from metal without ever having been fused the melting point of tungsten Is about degrees C degrees F a temperature which has been beyond that attainable in any ordinary metallurgical furnace A method of actually fusing this refractory frac tory metai has now it Is sold said by a german authority been devised by a berlin engineer which will permit of the metal bein being cast in any desired form and of being subsequently worked into any malleable shape including wire tor for electric lamps incidentally ci it would appear that tungsten carbide will also become adall available and as this carbide Is practically as hard as the diamond the difference being only as 98 to 10 it will be used in future for those numerous grinding arld arid cutting operations which can only be effected at present by the diamond |