Show now they can hear electrons hit one another a 14 ir 1 4 14 3 i I 1 rna liere here Is the vacuum tube amplifier developed by dr A IV Y cull shown at the right which makes it possible to oi the scientists to hear the movement of electrons though tile sound of each blow of 0 an electron Is 13 extremely minute the sum of many impacts mounts up until as doctor ault says the roar is like that ot of nicie niagara ara the device was perfected in the research laboratories ot of the general electric company L t |