TY - JOUR T1 - Experiments on the Directive Power of Large Steel Magnets, of Bars of Magnetized Soft Iron, and of Galvanic Coils, in Their Action on External Small Magnets. With Appendix, Containing an Investigation of the Attraction of a Galvanic Coil on a Small Magnetic Mass JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 162 SP - 485 EP - 497 PY - 1872/01/01/ UR - http://dx.doi.org/10.1098/rstl.1872.0018 M3 - doi:10.1098/rstl.1872.0018 AU - Bidwell, G. AU - Stuart, J. ER -