ScientificAmerican1897-12-11.jpg ThumbnailsScientific American 1899-10-28ThumbnailsScientific American 1899-10-28ThumbnailsScientific American 1899-10-28ThumbnailsScientific American 1899-10-28ThumbnailsScientific American 1899-10-28
Pneumatic mail tube system, New York City. Receiver at main station. Transmitter. Closde receiver (mechanical view).



Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner