Proceedings of the Royal Society of London, vol. 74, pp. 476-487. London: Harrison and Sons, 1905." /> FLEMING, James Ambrose (1849-1945). "On the Conversion of Electric Oscillations into Continuous Currents by means of a Vacuum Valve." In: <I>Proceedings of the Royal Society of London</I>, vol. 74, pp. 476-487. London: Harrison and Sons, 1905. | Christie's