Image: Irving Langmuir and Guglielmo Marconi in lab

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Description: Physicist Irving Langmuir (center) in his lab at General Electric in 1922, showing radio pioneer Guglielmo Marconi (right) a new 20 kW triode vacuum tube GE has developed for radio transmitters. Langmuir, a pioneer in vacuum technology and the inventor of the diffusion pump, is responsible for developing the modern "hard vacuum" radio tubes. The man on the left is Willis R. Whitney, director of GE's research lab.
Title: Irving Langmuir and Guglielmo Marconi in lab
Credit: Downloaded 28 August 2013 from "New 20 Kw Vacuum Tubes Open Great Radio Transmission Possibilities", Electrical Record (Electrical Record Publishing Co., New York), Vol. 32, No. 2, August 1922, p. 73 on Google Books
Author: Unknown authorUnknown author
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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