Thread:JetKirby37/@comment-35829463-20191222183642/@comment-35829463-20191222200052

Yes, it is! Have you read about those mail systems? They were used all over New York City and probably many other cities, "back in the day"! I remember some were still in use in a couple of stores in the town that we lived in when I was a little girl -- receipts for sales were sent through systems like that to the upstairs offices for accounting purposes. It's AMAZING to think that there was enough air pressure to propel those all over large cities ;-D