Diamond, Davy’s investigation of nature of, 184 Dibdin, Dr., his address on the occasion of Davy’s illness, 123 Edgeworth, Maria, her account of the respiratory action of nitrous oxide, 41; her account of Davy’s visit to Ireland, 112, 158; on Mrs. Apreece, 165 Electro-chemical Theory of Davy, 106 Electrolytic decomposition of water, Discovery of, by Nicholson and Carlisle, 90 Electro-magnetism, Davy’s contributions to, 218 “Elements of Chemical Philosophy,” Davy’s, 167 Euchlorine, 142, 151 Faraday, Michael, attends Davy’s lectures, 143; joins the Royal Institution, 173; his letters to Abbott concerning Davy, 188, 189; his relations to Davy, 220 “Fidelissima,” her sonnets to Davy, 78 Fire-damp explosions, 193 Flame, Davy’s investigations on, 209 Fluorine, Attempts to isolate, by Davy, 170 ---- theory, The, 172 _et seq._ “Fuming liquor of Cadet,” Davy’s investigation of, 132 Garnett, Thomas, first lecturer in the Royal Institution, 68 Gay Lussac, Davy’s account of, 179 Gilbert, Davies (Davies Giddy), 21, 22 Gray, Rev. Dr., his association with Davy, 195, 197 Heat a mode of motion, 32 “Heat, Light, and the Combinations of Light,” 30, 37 Hippesley, Sir John, 69, 80 Hodgson, Rev. Mr., his association with Davy, 194, 196, 201 Horner, Francis, his opinion of Davy as a lecturer, 77 Humboldt, Davy’s account of, 178 Hydrogen chloride, Synthesis of, by Cruickshank, 139 Iodates, Davy’s investigation of, 184 Iodine, Discovery of, by Courtois, 180; investigation of, by Clement, 180; by Davy, 180 _et seq._; by Gay Lussac, 180 Ireland, Davy’s views on, 112; his lectures in, 156 _et seq._ Lavoisier’s “Elements”--character as a text-book, 19 “Liquor of Libavius,” Action of ammonia on, studied by Davy, 137 Lockhart’s account of Davy, 110, 217 Nitrogen believed by Davy to be a compound, 132 _et seq._ ---- chloride, Investigation of, by Davy, 168; its explosion injures Davy, 169 ---- oxides, Davy’s work on, 42, 45 Nitrosulphonic acid, 154 Nitrous oxide, discovery of its respirability, 41, 46, 49; composition of, 45; effect of breathing, 49 Oxymuriatic acid, Davy’s memoir on, 134 Papyri, Davy’s attempts to unroll, 211 Penzance, State of society in, at close of 18th century, 14 Phosoxygen, 30, 33, 35, 37 Phospham, 138 Phosphorous acid and oxide, 153 ---- chlorides discovered by Davy, 129, 152; action of ammonia on, 137; action of water on, 140; analysis of, 153 Pneumatic Institution, Bristol, 23, 27, 29 Potassamide, Preparation of, 129 Potassium, Isolation of, 114 _et seq._, 116 _et seq._; properties of, 116 Priestley, Joseph, 38 Purkis, Mr., his account of Davy’s lectures, 77 Royal Institution, The, its origin and character, 66, 79; its chemical laboratory, 90, 133; minutes of Managers, 63, 72, 166, 175, 176