Issue 22 and Volume 38.

BRITISH AUTOMATIC FIRE ALARM. Consul Mahin, of Nottingham, gives the following account of a recently invented British automatic fire alarm: “A new automatic fire alarm was tested in this town this week. In a large room of a hotel, where three of the alarms, small instruments, were attached to the ceiling, a quantity of waste on a tray was saturated with methylated spirit and set on fire. In twelve seconds a gong attached by electric wires to the instruments on the ceiling sounded an alarm. Only the raising of the temperature to a certain degree (which may be varied according to circumstances) is required to cause the alarm. The instrument is merely a scientific application of the fact that the heat causes expansion. As soon as the metal in the little apparatus becomes affected by the rise in temperature, which must inevitably take place immediately a fire breaks out, it…

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