The pneumatic tube mail system in New York City was about the length of a marathon, connecting two dozen post offices going from downtown Manhattan to Harlem and back down, with cross town tubes ...

The only known remaining remnant of the pneumatic tube mail system is in the Old Chelsea Post Office at 217 W 18th Street, where tubes come through a wall in the basement.

Contents fragile! That white thing getting ready to be whisked away in a tube is, indeed, a cat. (Wikimedia Commons) Before people relied on a theoretical series of tubes for the exchange of ...

Starting in 1897 and lasting until 1953, the New York City Post office moved mail across the city using, in part, an intricate system of pneumatic tubes-- tubes that were networked underground at ...