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Scientific American, Vol. 44, No. 17 (April 1881) (1881)

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An illustration from Scientific American, Vol. 44, No. 17 (April 1881), 1881, leaf 0
from the signal box transmits the arbitrary call for help to the district station. Instantly a detail of vidual animal will be curiously complete. The civic organ- delay. ization will become sensitive, so to speak, at every point, and three men with the patrol wagon hasten to the point whence This… … THE CHICAGO POLICE TELEPHONE AND PATEOL SYSTEM. © 1881 SCIENTIFIC AMERICIAN, INC

Patents · Patented · Iron · Wheel · Feet · Scientific American · Going · Steam fire · Salt water · Cubic feet · Union iron · Aluminium gold · Truckee river · Wrought iron · Wood working · Police telephone

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