Show electr ty I 1 alternating electric currents may be perceived direct by the ear ath out using a telephone disk to convert them into mechanical movement ax peri ments made by joseph rieder of germany show that it is possible by simple apparatus to charge the whole body with the rapid ly alternating impulses due to the cur rent the drum of the ear vibrates in response to this action and hence a sound is heard it Is necessary sim ply to press against the ear the outer metallic coating of a leyden jar whose inner coating Is connected with one pole of an induction coil and to grasp the opposite pole with the hand kleder thinks it not impossible to per feet this arrangement that it will transmit speech telephonically |