TY - JOUR T1 - The Diurnal Variation of Terrestrial Magnetism JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 89 IS - 612 SP - 379 EP - 392 PY - 1914/01/01/ UR - http://dx.doi.org/10.1098/rspa.1914.0003 M3 - doi:10.1098/rspa.1914.0003 AU - Walker, G. ER -