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Watson, ... If I Can Get A Mechanism Which Will Make A Current Of Electricity Vary In Its Intensity, As The Air Varies In Density When A Sound Is Passing Through It, I Can Telegraph Any Sound, Even The Sound Of Speech.
-Alexander Graham Bell
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Watson, ... If I Can Get A

Watson, ... If I Can Get A Mechanism Which Will Make A Current Of Electricity Vary In Its Intensity, As The Air Varies In Density When A Sound Is Passing Through It, I Can Telegraph Any Sound, Even The Sound Of Speech.
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