Titles read: "THE MORSE MACHINE".
Various shots of a newly invented machine that sends messages in Morse Code. The letters are input by means of a dial on the side of the machine, then the Morse characters are projected through a lens to a receiving machine some distance...
Communication technology in action - cables which span the Atlantic and a "siphon recorder".
Old radio masts are knocked to the ground in Hanover, Germany.
A telegram is typed on a teleprinter machine in London, and is printed out in Edinburgh.
A tour around the Post Office Radio Station at Rugby.
A film about psychological test been carried out to discover what jobs people are best suited too.
Leader of the Communist Party addresses the public.
Leon Trotsky denounces Stalin while he is in exile in Mexico.
US army equipment bolsters Laotian defences against Communist China and North Vietnam.