Describes carriers, receiver, transmitter, etc. of pneumatic mail tubes which were in use in Philadelphia, also automatic railway as substitute for automobiles running from Paddington to White-chapel, Lond., for carrying mail automatic control of trains.
Pneumatic mail tubes and operation of automatic railroads
Engrs. Eng
Engineers and Engineering ; 39 , n 10
1922
7 pages
3 Figs.
Aufsatz (Zeitschrift)
Englisch
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