Tunnel with double-track narrow-gage line connects post offices; trains controlled from stations; railway will provide for 800 trips per day at average speed of 20 m.p.h.; single iron-lined tunnel 9 ft. in diameter carries line of 2-ft. gage; third-rail current is 440 volts.
Automatic underground railway handles London's mail
Eng. News-Rec
Engineering News Record ; 100 , n 20
1928
2 pages
3 Figs.
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
London's automatic underground
Tema Archive | 1969
SLUB | 1962
|Engineering Index Backfile | 1949
British Library Online Contents | 1994
|