F. W. Jordan (1919) "Sustaining the vibration of a tuning fork by a triode valve," The Electrician, vol. 8, no. 2, page 704. F. W. Jordan (1919) "A method of measuring the amplification of a radio-frequency amplifier," Proceedings of the Physical Society of London, vol. 32, pages 105–115. W. H. Eccles and F. W. Jordan (1920) "A method of amplifying electrical variations of low frequency," The Electrician, vol. 8, no. 5, page 176. Patents Frank Wilfred Jordan, "Improvements relating to radiometers, thermogalvanometers, and the like" British patent number: GB 191226631 (filed: 1912; published: 20 November 1913). William Henry Eccles and Frank Wilfred Jordan, "Improved method of generating electric oscillations" British patent number: GB 149018 (filed: 20 March 1918; published: 12 August 1920). William Henry Eccles and Frank Wilfred Jordan, "Improvements in applications of thermionic valves to production of alternating currents and relaying" British patent number: GB 155854 (filed: 17 April 1918; published: 6 January 1921). William Henry Eccles and Frank Wilfred Jordan, "Improvements in ionic relays" British patent numbers: GB 148582 (filed: 21 June 1918; published: 5 August 1920) and GB 149702 (field 21 June 1918; published: 26 August 1920). 1881 births 1941 deaths 19th-century English scientists 20th-century English scientists 19th-century British physicists 20th-century British physicists English inventors English physicists People educated at Simon Langton Grammar School for Boys People from Canterbury Alumni of the Royal College of Science