TY - JOUR T1 - On Slow Changes in the Magnetic Permeability of Iron JF - Proceedings of the Royal Society of London (1854-1905) VL - 57 SP - 224 EP - 242 PY - 1894/01/01/ UR - http://dx.doi.org/10.1098/rspl.1894.0145 M3 - doi:10.1098/rspl.1894.0145 AU - Mordey, W. ER -