A Manual of Electricity, Magnetism, and Meteorology, Volume 2

apparatus appear Arago atmosphere atmospheric electricity attracted aurora AURORA BOREALIS balls F body boiler cause chain Col du Géant communication condenser conductor continue diameter diffused disc A B discharge dissimulated distance divergence ductor earth effects elec electric fluid electrical machine electrified electrometer electrophorus electroscope experiments explained explosion external coating extremity feet flash free electricity fulgurites fused glass globe of fire gold leaf gradually ground heard heavens height inches induction instrument insulated intensity interval issued July knob Leyden jar lightning struck luminous metallic meteor motion natural electricities negative electricity nitric acid nonconductors observed odour paratonnerres particles pass phenomena Phil pith balls plate positive electricity present prime conductor produced quantity rain repelled represented in fig resin rolling of thunder Saussure snow sound spark steam stratum struck by lightning sulphureous surface thunder clouds thunder storms tion tricity tube vapour vitrification wire