1820, Feb 221901, Mar 20
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. Channing was an assistant on the first geological survey of New Hampshire during 1841–42. He was associated with Henry Ingersoll Bowditch in the editorship of the Latimer Journal in Boston from 1842 to 1843. He also served in the capacity as an assistant on the geological survey of the copper region of Lake Superior in 1847.
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05/19/1857-William Francis Channing and Moses G. Farmer patents electric fire alarm
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