TY - JOUR T1 - The Diffraction of Electric Waves by the Earth JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 95 IS - 666 SP - 83 EP - 99 PY - 1918/10/07/ UR - http://dx.doi.org/10.1098/rspa.1918.0050 M3 - doi:10.1098/rspa.1918.0050 AU - Watson, G. ER -