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Alarm's Brain . . . was this copper, brass, glass and white marble beauty known as a repeater. All 40 street fire alarm boxes were monitored through the device. Ticker tape punched out code to correspond to alarm box number.

Button Box . . . on the right is demonstrated by Asst. Fire Chief Norman Elgan. Disks inserted in the box would cause the other station's gongs, like one on left, to ring out the fire's location.