Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Johnson John Bertrand F4

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Johnson John Bertrand F4

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$20.00
Image title: 
John B. Johnson, P.P. Cioffi and H.W. Weinhart discuss vacuum tube problem.
Credit line: 
Western Electric Co., courtesy AIP Emilio Segrè Visual Archives
Description: 

(L-R): J.B. Johnson, P.P. Cioffi, Laboratory Assistant, now authority on magnetics, and H.W. Weinhart, outstanding glass technologist, discuss vacuum tube problem.

Photo date: 
circa 1920
Original format: 
1 photographic print (black and white; 6 x 4 inches)
Person(s): 
Johnson, John Bertrand