TY - JOUR T1 - The Transmission of Electric Waves around the Earth's Surface JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 98 IS - 694 SP - 409 EP - 411 PY - 1921/03/03/ UR - http://dx.doi.org/10.1098/rspa.1921.0013 M3 - doi:10.1098/rspa.1921.0013 AU - Macdonald, H. ER -