In the history of mobile emergency signaling, lights were a late addition. When New York City launched its first ambulance service in 1869, the horse-drawn vehicles sounded a gong to get folks to pull over.
In 1909, the Albany-based James Cunningham, Son & Company launched the first commercial gas-powered auto ambulance, but its specialized lighting was on the interior, in the form of a few domed lamps used to illuminate the ill.
(via Look At This...)
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