Show new form of arc lamp A new form of arc lamp has just been devised says the scientific amerlean american in which cairon disks ale aie used instead of carbon rods these disks arc constantly rotated and theara takes place beti between een the of the disks owing to tile the continuous rotation the disks are consumed uniformly the lamps are small as ah compared to the ordinary type the size of a ten ampere lamp Is hut but 20 inches over all it Is claimed for this ibis lamp that it will burn 60 50 per cent longer than the rod t type pe |