ScientificAmerican1897-12-11.jpg Photoplay 1941-01ThumbnailsScientific American 1904-11-19Photoplay 1941-01ThumbnailsScientific American 1904-11-19Photoplay 1941-01ThumbnailsScientific American 1904-11-19Photoplay 1941-01ThumbnailsScientific American 1904-11-19Photoplay 1941-01ThumbnailsScientific American 1904-11-19
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