Proceedings of the Royal Society, volume 117, pp.610-24. London: Harrison & Sons, 1928. 8° (253 x 176mm). Original wrappers, grained leather slipcase. 'Based on fundamental considerations only Dirac introduces the idea of the existence of a positively charged electron or positron', Gedeon pp.514-519." /> DIRAC, Paul Adrien Maurice (1902-1984). "The Quantum Theory of the Electron", in: <I>Proceedings of the Royal Society</I>, volume 117, pp.610-24. London: Harrison & Sons, 1928. 8° (253 x 176mm). Original wrappers, grained leather slipcase. 'Based on fundamental considerations only Dirac introduces the idea of the existence of a positively charged electron or positron', Gedeon pp.514-519. | Christie's