APPENDIX L. ON the LIGHTNING CONDUCTORS at the PARIS INTERNATIONAL ELECTRICAL EXHIBITION, by Messrs. Dymond and Symons. · Lightning Rod Conference / Report of the Delegates from the Following Societies, Viz.: Meteorological Society, Royal Institute of British Architects, Society of Telegraph Engineers and of Electricians, Physical Society. With a Code of Rules for the Erection of Lightning Conductors; and Various Appendices