Show phones and B battery to test teat old lamp cord old flexible lamp cord which has been handled a groat great deal frequently in found to have one or more branks in tie the wire inside the insulation the continuity of a strand can easily be determined by connecting the ends in series with a pair of phones phone and a A battery if the phones phone emit a loud clack the wire la Is whole if they remain silent when the tb circuit li Is completed the wire la Is broken somi bonn where along its ita length |