TY - JOUR T1 - On Periodical Laws Discoverable in the Mean Effects of the Larger Magnetic Disturbances JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 141 SP - 123 EP - 139 PY - 1851/01/01/ UR - http://dx.doi.org/10.1098/rstl.1851.0007 M3 - doi:10.1098/rstl.1851.0007 AU - Sabine, E. ER -