The Paris pneumatic post was a pneumatic tube message-carrying service that operated in the French capital from 1866 through 1984. It was established because of the popularity of the electric telegraph in the city which had led to the signal cables becoming overloaded and messages being sent by road.
The Paris pneumatic post was a pneumatic tube message-carrying service that operated in the French capital from 1866 through 1984. It was established because of the popularity of the electric telegraph in the city which had led to the signal cables becoming overloaded and messages being sent by road.
Source: Wikipedia "Paris pneumatic post" · CC BY-SA 4.0
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