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https://www.youtube.com/watch?v=-hzM8IJnb2M
Mar 24, 2015 · You've seen pneumatic tubes in action at the bank drive through or in skyscraper mail delivery, but finally, this technology has found its ultimate purpose. Kevin Moore and Grant Reynolds create ...Author: Science Channel
https://untappedcities.com/2013/03/15/nycs-pneumatic-tube-mail-network/
The first pneumatic tube mail system was installed in Philadelphia (sorry New York) in 1893. New York City’s came in 1897. Each tube could carry between 400 and 600 letters and traveled at 30-35 ...
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