I’m often asked what my favorite weird/obscure fact about New York City was. Ironically, as the founder of Untapped New York, this question frequently proves difficult because there are just so many ...

Powered by compressed air, the system transported millions of letters between 1897 and 1953 Vanessa Armstrong - History Correspondent A pneumatic mail tube at the main Post Office Department branch in ...

All of the buzz about Elon Musk's Hyperloop has Gizmodo and the Times remembering the original underground compressed air-based transportation idea—Alfred Ely Beach's Pneumatic Tunnel, built in 1869.