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Decade
1930-1939
  
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  • Voices Across the Sea
    Text  Perrine, Dr. J.O., The Empire Club of Canada Addresses (Toronto, Canada: The Empire Club of Canada, 1936), 17 Oct 1935, 56-74     The transformation and transmittals of waves. The telephone in the classification of transportation, and how that is so. Getting the sound out of a subscriber's mouth into another subscriber's ear. Visual demonstrations of sound waves. How the microphone works. A demonstration of what is going on inside a telephone. Other ...
    Text  Perrine, Dr. J.O., The Empire Club of Canada Addresses (Toronto, Canada: The Empire Club of Canada, 1936), 17 Oct 1935, 56-74   The transformation and transmittals of waves. The telephone in the classification of transportation, and how that is so. Getting the sound out of a subscriber's mouth into another subscriber's ear. ...
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