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Chatsworth
BristolGalleries
RAMM
Adverts
Ancient History
Art
Authors
Bible
Christmas
Cities & Places
Dance
Decorative
English History
European History
Fiction
Film Stars
French History
German History
Inventions
Middle East
Music Score Covers
Performance
Philosophers
Plays & Actors
Politicians
Railways
WWI
Images Dated

Thermionic valve 1920 -
Thermionic valve, 1920 - drawing of the valve, resulting from Sir Ambrose Flemings invention of 1904, that revolutionised wireless telephony. Fleming: 29 November 1849 - 18 April 1945
© Lebrecht Music & Arts Photo Library 2008 - All Rights Reserved
Drawing, Early 20th Century, Physicist, Radio, Science, Scientist, Social History, Technology, Thermionic, Twenties, Valve