Source: Wireless World (June 30, 1926), 878. Available via Google Books
Select sources
Present-Day Sources about Electronic Amplification and Related Technologies
- Chad Orzel, “The Surprisingly Complicated Physics Of A Light Bulb,” Forbes, 21 May, 2015. https://www.forbes.com/sites/chadorzel/2015/05/21/the-surprisingly-complicated-physics-of-a-light-bulb/ , accessed 30 Apr., 2023.
- John Lienhard, Engines of Our Ingenuity (Radio show), “Episode 1323: Fleming’s Electric Valve,” at https://www.uh.edu/engines/epi1323.htm, accessed 27 April, 2023.
Secondary Source
- Napa County Historical Society, “Ask a Librarian: Magnavox Loudspeaker,” Posted 5 May, 2015: https://napahistory.org/ask-a-librarian-magnavox-loudspeaker/, accessed 1 May, 2023.
Select Primary Sources
- “Men of Science See De Forest’s Audion,” New York Times, 11 December, 1915.
- “Crowd Hears Loan Speech from Plane High in Sky” Washington Times, Final edition, 21 Apr., 1919, 1 & 17.
- “A Voice from the Sky,” Popular Science Monthly, Vol. 95, No. 1 (July 1919), 81.
- Robert William West, Purposive Public Speaking: A College Text Book for Courses in Public Speaking (New York: Macmillan Company, 1924), 4. https://books.google.com/books?id=dQg2AQAAIAAJ
- “Loud-Speakers in Bath Abbey: Improving Poor Acoustics in a Famous Church” in Wireless World (June 2, 1926), 736. https://books.google.com/books?id=1WWTxTG30AYC
- “The Ubiquitous Loud-Speaker” photo & caption, Wireless World (June 30, 1926), 878. https://books.google.com/books?id=1WWTxTG30AYC
