By means of a special headset and transmitter, a San Francisco coach is teaching swimming via telephone in 1934. The instructor stands on the edge of the pool and relays advice to his pupil in the water.
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| The inventor of the swimaphone tests his apparatus before sending his fair pupil out into deep water for instruction. |
Specially prepared, waterproof transmitters and receivers, plus a length of telephone wire, comprise the set which operates on a charge of three volts. The advantage of the device is that faults are corrected while the swimmer is in action.
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