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 - Proceedings of the Royal Society of London (1854-1905) VL - 20 SP - 158 EP - 159 PY - 1871/01/01/ UR - http://dx.doi.org/10.1098/rspl.1871.0037 M3 - doi:10.1098/rspl.1871.0037 AU - Airy, G. AU - Stuart, J. ER -