TY - JOUR T1 - Note on Induction Coils or 'Transformers' JF - Proceedings of the Royal Society of London (1854-1905) VL - 42 SP - 164 EP - 167 PY - 1887/01/01/ UR - http://dx.doi.org/10.1098/rspl.1887.0031 M3 - doi:10.1098/rspl.1887.0031 AU - Hopkinson, J. ER -