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Electric fire alarm is patented in Boston

Boston, 1860, zoomable map
05/19/1857
William Francis Channing of Boston and Moses Gerrish Farmer of Salem, Massachusetts patented the first electric fire alarm.  Boston was the first city to experiment with the system. (By John Osborne)
Source Citation: 
Joseph Nathan Kane, ed., Famous First Facts (New York: H.W. Wilson Company, 1981), 262.

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How to Cite This Page: "Electric fire alarm is patented in Boston," House Divided: The Civil War Research Engine at Dickinson College, http://hd.housedivided.dickinson.edu/node/11843.