William Francis Channing (February 22, 1820 – March 19, 1901) was an American physician, scientist, and abolitionist known for inventing the telegraph fire alarm system and contributing to the development of the telephone. He published books on medicine and electricity, and patented several inventions. Channing was also involved in Boston abolition activities including the Latimer Committee and the Boston Vigilance Committee.
William Francis Channing was born to prominent Unitarian minister William Ellery Channing and wife Ruth Gibbs in Boston, on February 22, 1820. Like his father… More on Wikipedia →
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Brown profs swap bar magnet for Bell's horseshoe magnet, enabling butterstamp telephones
