Each tube could carry between 400 and 600 letters and traveled at 30-35 miles per hour. In its full glory, the pneumatic tubes covered a 27-mile route, connecting 23 post offices…. 95,000 letters were moved daily [and] it took 4 minutes to get from the General Post Office to Grand Central using a transverse tube that cut across Manhattan.
Commuter train in Bohn’s ‘Visions of the Future’ Ads, 1940s
America of the Future, c. 1910s-30s.
Images: Selected Time Magazine covers, 1993-1996.
Giant dog! People From a Long Time Ago, with Dogs