Show telephoning without wire wires telephone Tel ephon ng without wired wire was sue cess fully accomplished at minneapolis saturday by transmitting the voice across the mississippi river near the franklin avenue bridge a distance of over 1 1000 feet one hundred and fifty feet of copper wire was strung parallel on either side of the river and a five volt current used words could be as distinctly under as over the regular on wire tele phone and th a was again followed by the muddled and indistinct sounds at one time it was easy to identify the person talking by the tone of the voice and his words were unusually clear other batteries were then attached five at a t me finally cutting in twenty volts at one end of the line with five theother on the other the operator at the five volt end could not only understand what was being said but could hear others talking on the bank of the river near the transmitter |