D Darwin, Erasmus, his connection with the Birmingham Lunar Society, 94, 95. Daventry Academy, 18. Dephlogisticated Air (Oxygen), Priestley’s discovery of, 184, 192 _et seq._ _Doctrine of Phlogiston Established_, Priestley’s last scientific work, 162. E Edgeworth, Richard Lovell, his account of the Lunar Society, 96. Electricity, History of, Priestley’s, 63. Enfield, William, 33, 43. Eudiometry, 182, 207, 208. Eyres, William, of Warrington, 38. F Faujar St Fond, his visits to Priestley, 103. Fieldhead, 3. Fluor Acid Air, 198. Forster, John Reinhold, 33, 81. Franklin Benjamin, 63, 91, 92; his opinion of Priestley, 93. G Galton, Samuel, 94, 96. Gases, diffusion of, 202. “General History of the Christian Church to the Fall of the Western Empire,” 109, 163. Gordon, Rev. Alexander, his account of Priestley as a theologian, 109. H Harrison, Frederic, on Priestley, 1. Horner, Leonard, his account of the Lunar Society, 102. Hutton, Miss, her account of Priestley as a preacher, 105. I India-rubber, its use for erasing lead-pencil marks, 72. J “Jesus and Socrates compared,” Priestley’s Essay, 163. K Keighley, Mrs Sarah, 3, 8, 12. Keir, Captain, 94, 127. Kippis, Dr Andrew, 24, 26. Kirwan, Richard, 215, 223. L Lavoisier, his relations to the discovery of oxygen, 195, 196, 198, 201, 215. “Letters to a Philosophical Unbeliever,” Priestley’s, 85. Lindsey, Theophilus, his friendship for Priestley, 73, 106. Lunar Society of Birmingham, 94 _et seq._ M Magellan, or Magalhæns, 84, 205. Marine Acid Air (Hydrogen Chloride), Priestley’s discovery of, 184. “Melioration of Air, by the Growth of Plants,” Priestley’s paper on, 208. N Nitrosulphuric Acid, discovery of, 204. Nitrous Air (Nitric Oxide), Priestley’s work on, 181; his application of it to Eudiometry, 182; nature of, 221. Nitrous Acid, discovery of, 182; nature of, 221. O Oxygen, Priestley’s discovery of, 184, 192 _et seq._