The Construction and Use of Oscillation Valves for Rectifying High-Frequency Electric Currents (Fleming) AND Secondary Rontgen Radiation (Barkla) in The Physical Society of London, Proceedings, XX, Part II, July 1906, pp. 177-185; 200-218 [FIRST EDITION. ORIGINAL WRAPPERS]
London: Taylor and Francis, 1906. 1st Edition. ORIGINAL WRAPPERS. FIRST APPEARANCE IN PRINT OF TWO IMPORTANT PAPERS, FLEMING ON HIS VALVE & BARKLA’S 1st IN-DEPTH PAPER SHOWING THAT X-RAYS SCATTERED BY VARIOUS ELEMENTS PRODUCED BEAMS OF CHARACTERISTIC PENETRATION. Both papers were first read before The Physical Society of London on..... More