A Police and Fire Alarm System goes into operation in Baltimore, Maryland

Baltimore's Police and Fire Alarm system connected thirty street stations, or boxes, with fifteen miles of wire, each designed with a crank to ring a bell at fire or police headquarters and then transmit with a Morse key the number of the box sending the alarm. By 1876, the system had thirty-seven miles of wire connecting eighty-two boxes all over the city. (By John Osborne)
Source Citation
Charlton Thomas Lewis, Joseph H. Willsey, Harper's Book of Facts: A Classified History of the World; Embracing Science, Literature, and Art (New York: Harper & Brothers, 1895), 75. Clarence H. Forrest, Official History of the Fire Department of the City of Baltimore: Together with Biographies and Portraits of Eminent Citizens of Baltimore (Baltimore, MD: Williams & Wilkins, 1898), 194.
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Exact
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Science/Technology
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How to Cite This Page: "A Police and Fire Alarm System goes into operation in Baltimore, Maryland," House Divided: The Civil War Research Engine at Dickinson College, https://hd.housedivided.dickinson.edu/node/23073.