Alexander Graham Bell Quotes

Alexander Graham Bell Quotes: I have heard articulate speech produced by sunlight I have heard a ray of the sun laugh and cough and sing! ... I have been able to hear a shadow, and I have even perceived by ear the passage of a cloud across the sun's disk.
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Alexander Graham Bell Quote: The final result of our researches has widened the class of substances sensitive to light vibrations, until we can propound the fact of such sensitiveness being a general property of all matter.
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Quotes about Alexander Graham Bell: The only difference between success and failure is the ability to take action.
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