Revolution, French, its effect on Priestley, 70; Lavoisier guillotined, 99. Richter's equivalents of acids and bases, 162. Ripley, Canon, an alchemist, his poems, 18. Rouelle, invents term "base," 179; his studies on salts, 181. S Salts, 173; "principle of salt" opposed by Boyle, 177; earth or alkali the _base_ of salts, 179; Rouelle's inquiries, 181; Lavoisier's definition, 184; considered as metallic derivatives of acids, 205; alcoholic salts, 235. "Sceptical Chymist, The," by Hon. Robert Boyle, 76-93. Shelburne, Earl of, patron of Priestley, 58; to whom he grants an annuity, 65. Spectroscopic analysis, 302; lines in solar spectrum, 306; the solar atmosphere, 308; Lockyer's mapping of the lines, 310; basic lines, 311; objections to his hypothesis, 313. Stahl, George Ernest, born at Anspach, 27; enunciates the phlogistic theory, 27, 48; his "primordial acid," 174; his essential property of earths, 178. Sulphur dioxide, discovered by Priestley, 66. Sulphur salts, discovered by Berzelius, 161. T Transmutation, confuted by Lavoisier, 81. Transpiration of gases, 242. Types, 279. V Valentine, Basil, an alchemist, 15; his views on alkalis, 174. Van Helmont, 24. Vitriols, 180. Volta's electric pile, 184. W Water, its composition discovered by Cavendish, 68-78; nearly discovered by Priestley, 68; confirmed by Lavoisier, 90; decomposed by electricity, 185. Weight of ultimate particles, 117, 132; molecular and atomic, 145; revision of atomic weights, 285. Woehler, his account of visit to Berzelius, 160, 204, 229; studies cyanates with Liebig, 264; results of his discovery as to urea, 265. Wollaston, supports atomic theory, 130. PRINTED BY WILLIAM CLOWES AND SONS, LIMITED, LONDON AND BECCLES.