Ripley, George, 43 Robiquet, 161, 167 Roebuck, 108 Romé de L’Isle, 176 Rose, Gustav, 177 Rosenkreutz, Christian, 55 Rouelle, 94, 106, 159 Royal Society, foundation of, 74 _Rubrica_, 13 Rupecissa, Johannes de, 43 _Saccharum plumbi quintessentiale_, 157 Sala, Angelus, 65 _Sal Armoniacum_, 44 _Sal Duplicatum_, 81 _Sal mirabile_, 68 _Sandarach_, 13 Saturnine solutions, 37 Savary, 155 Sceptical Chemist, The, 70 Scheele, 96 _et seq._, 107, 155, 158, 159, 160, 166 Schroeder, 181 _Scoria æris_, 12 Sefström, 135 Seguin, 159 Seignette, Peter, 157 Selenium, its discovery, 135 Sennert, Daniel, 65 Sertürner, 161 Severinus, 61 Silver, known to the ancients, 7 _Sinopis_, 13 Soap, manufacture by Gauls, 15 Specific heat, discovery of, 99 _Spiritus igno-aëreus_, 82 Stahl, George Ernst, 92, 156 _Stannum_, 10 _Statical Essays_ of Hales, 89 _Statique Chimique_, 117 Stephanus, 35 _Stibium_, 13 _Stimmi_, 13 Strontia, discovery of, 107 Suidas, 34 “Sulphur,” as “element”, 31 Sulzbach, 110 Sun worship, 22 Sylvius, Francis de le Boë, 64 Syncellus, 35 Tachenius, 69 Tartarus, doctrine of, 59, 157 Tellurium, discovery of, 121 _Terra pinguis_ of Becher, 92 _Tertiarium_, 10 Tertullian, 19 Thales of Miletus, 19 Thénard, 152, 164 Theophrastus, 156 The Tincture, 32 Thilorier, 180 Thomson, Thomas, 129 Thorium, its discovery, 135 Thurneysser, Leonard, 53, 60 Tin, known to the Egyptians, 9 Transmutation, 28, 30 Trommsdorff, 157 Tubal Cain (Tuval-Cain), 7 Turquet de Mayerne, 158 Tyrian purple, 14 Valentine, Basil, 43, 47, 49, 156 Van Helmont, 20, 48, 63 _Vasa murrhina_, 15 Vauquelin, 119, 155, 158, 161, 162 Verdigris, 56 Vincent de Beauvais, 50 Von Ittner, 160 Wallis, John, 74 Ward, Seth, 74 “White” gold, 7 Wilcke, 172 Willis, Thomas, 64, 74 Wöhler, 161, 163, 167 Wollaston, 144, 176 Woodward, 160 Wray, 159 Wren, Christopher, 74 Zacharias, Daniel, 49 Zozimus the Panopolite, 4 Transcriber’s Notes Punctuation and spelling were made consistent when a predominant preference was found in this book; otherwise they were not changed. Simple typographical errors were corrected; occasional unbalanced quotation marks retained. Ambiguous hyphens at the ends of lines were retained; occurrences of inconsistent hyphenation have not been changed. Index not checked for proper alphabetization or correct page references. Page 16: “_jeunesse d’oreé_” was printed that way, but should be “_jeunesse dorée_”. Page 183: “Moyenâge” was printed that way, but should be “Moyen Âge”.