TY - JOUR T1 - Magnetic Properties of Alloys of Nickel and Iron JF - Proceedings of the Royal Society of London (1854-1905) VL - 47 SP - 23 EP - 24 PY - 1889/01/01/ UR - http://dx.doi.org/10.1098/rspl.1889.0063 M3 - doi:10.1098/rspl.1889.0063 AU - Hopkinson, J. ER -