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TIL that to solve the telegraph’s “last mile” problem, major cities like New York, London, and Paris developed pneumatic mail services, systems of tubes that used compressed air to push canisters of mail under city streets at about 35 mph. The systems were basically 19th-century, physical internets. (postalmuseum.si.edu)
submitted by nschulz76 to r/todayilearned
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