MENU
Pneumatic-Tube Room General Post Office London Descriptive sketch of the transit of telegraphic messages by pneumatic tube system from district offices to the Central Station and more. 18-07-2018   22-07-2018
Pneumatic City Mail London Great Britain Interesting sidelights on the work of the G.P.O. 14-05-2013   25-07-2018
   MORE PNEUMATIC TUBE SYSTEM