TY - JOUR T1 - Magnetic Polarity and Neutrality JF - Proceedings of the Royal Society of London (1854-1905) VL - 36 SP - 404 EP - 417 PY - 1883/01/01/ UR - http://dx.doi.org/10.1098/rspl.1883.0120 M3 - doi:10.1098/rspl.1883.0120 AU - Hughes, D. ER -