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William Francis Channing : ウィキペディア英語版 | William Francis Channing
William Francis Channing (February 22, 1820 – March 20, 1901) was an American activist, electrical researcher, scientist, physician, and inventor. He invented the first citywide electric fire alarm system. Channing worked with Alexander Graham Bell in developing the telephone. == Early life == Channing was born in Boston on February 22, 1820. He was the son of William Ellery Channing, the Unitarian preacher, and Ruth Gibbs. He was cousin of William Henry Channing, Unitarian clergyman, writer and philosopher.〔 〕
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