TY - JOUR T1 - An Attempt to Account for the Regular Diurnal Variation of the Horizontal Magnetic Needle; And Also for Its Irregular Variation at the Time of an Aurora Borealis: By John Canton, M. A. and F. R. S. JF - Philosophical Transactions (1683-1775) VL - 51 SP - 398 EP - 445 PY - 1759/01/01/ UR - http://dx.doi.org/10.1098/rstl.1759.0040 M3 - doi:10.1098/rstl.1759.0040 AU - Canton, J. ER -