Colours, ancient, 5, 6, 218. " and Pigments Individually, on, 57. " broken, 16. " classes of:-- " " Neutral, 27. " " Primary, 28. " " Secondary, 28. " " Semi-Neutral, 29. " " Tertiary, 28. " complementary, 391. " discordant, 17, 185. " entire, 28. " extreme, 28. " fugacity of ancient, 6. " held in check, 106. " hot and cold, 20. " imaginary, 115. " individual beauty of, 57. " light and dark, 30. " material, mixture of, 384. " mixture and compounding of, 17-19. " not obtainable, 114. " not pigments, 305. " perspective of, 22. Colours, retiring or advancing, 186-188. " superfluous, 124. " unfitted for pigments, 115, 180. " vitrified, 33, 197. " with black, 27, 392. " " colours, 27. " " grey, 382. " " white, 27, 63. Common pigments, 359. Compounding colours, on, 242-252, 277. Compound pigments, 36. Constable, 265. Constantinople, 7. Constant White, 65. " free acid in, 66. Contrast of colour and neutrality, 15. " gradations and extremes, 19. " hues, 13-15. " shades, 15. " warmth and coolness, 15. Copper Blues, 227-230. " Borate, 285. " Brown, 355. " Chrome, 286. " Greens, 271-276. " Prussian Black, 408. " Prussiate of, 323. " Reds, 164. " Smalt, 220. " Stannate, 286. " Yellow, 116. Cork Black, 409. Correggio, 8, 335. Cory's Madder or Yellow Madder, 119, 353. Cotton Seed Blue, 230. Cremnitz or Crems White, 72. Crimson Lake, 135. Crookes, Mr., 260. Crowding of pictures, 364. Cudbear, 303. Cullen's Earth, 344. Cuttle Fish, 348. Cuyp, 136. Cyanine, 198. Cyanus, 198, 217. D. Damonico, 257. Darkening of mineral colours, 284. Davy, Sir H., 229. Dead Sea, the, 337. Deep Cadmium, 87. " Chrome, 93. " Vermilion, 154. " Deoxidation of pigments, 38. Detractors of modern pigments, 43-45. Dewint's Green, 330. Diagram, 89. Diesbach, M. 203. Dilution of colour, 34. Di Palito, 109. Direct and diffused light, 391. Discord of colours, 17, 185. Disinfectants of the palette, 359. Distance, law about, 188. Distilled Verdigris, 276. Distinction of colours, 318, 320. Dominichino, 8. Dragon's Blood, 137. " with White Lead, 138. Drop Gum, 96. Drying of pigments, 50. " oils, lead in, 121. Duffield, Mrs., 144. Dumas, M., 234, 414. Dumont's Blue, 196. Durability of pigments, 31-45, 46. Dussance, Professor H., 175. Dutch Pink, 100. " Schools, 8. " the, 156, 200. " Ultramarine, 189. " White, 74. Dyeing, brown for, 318. " orange for, 257. Dyes and pigments, 169. E. Earth Black, 404. " Burnt Sienna, 243. " Cassel, or Castle, 343. " Cologne, 344. " Cullen's, 344. " Green, 283. " Raw Sienna, 113.