Terra di Sienna, 113. " " " Burnt, 243. " Orellana, 255. " Puzzoli, 149. " Sinopica, 147. Terre Bleu, 228. " Verte, 283. " " Olive, 333. Terrene whites, 66, 80. Tertiary colours, 28. " on, 311. Thallium, in sulphide of cadmium, 260. " Orange, 259. " Red, 177. " Yellow, 122. Thebes, mausoleum at, 3. Thénard, M., 69, 192. Thénard's Blue, 192. Theophrastus, 198. Theory and practice, 410. Thwaites' Yellow, 122. Time, pigments affected by, 40. Tin Pink, 177. " Violet, 308. " White, 79. Tin-Copper Green, 286. Tint, Harding's, 380. " Macpherson's, 380. " Neutral, 377. Tintoret, 8. Tints, 27. Titanium Green, 290. Titian, 7, 8, 9, 11, 37, 150, 157, 293, 334. Transparency of pigments, 48. " to obtain, 245. Transparent Gold Ochre, 108. " Oxide of Chromium, 268. " pigments, use of, 237. Troy White, 80. True Chrome Green, 267. " Prussian Green, 281. " Ultramarine, 216. Truth of hue in pigments, 47. Tullus Hostilius, 295. Tungsten Blue, 233. " White, 414. Turacine, 165. Turbith Mineral, 123. Turkey Berries, 312. Turnbull's Blue, 208. Turner, 309, 328. Turner's Yellow, 121. Tyrian Purple, 295, 296. U. Ultramarine, Artificial, 209-216. " acid pigments with, 214. " adulteration of, 215. " experiment with, 213. " green in, 211. " gum with, 214. " in siliceous painting, 212. " test for, 212. Ultramarine Ash, 379. " Beggars', 409. " Brilliant, 215. " Cobalt, 192. " Dutch, 189. " Factitious, 215. " French, 215. Ultramarine, Genuine, 216-225. " adulteration of, 224. " colouring matter of, 224. " defects in, 222, 223. " manufacture of, 220. " price of, 220. " properties of, 221. " tests for, 224. Ultramarine, Gmelin's German, 209. " Green, 287. " Guimet's, 209-211. " Native, 216. " Natural, 216. " Pure, 217. " Real, 216. " Red, 178. " True, 216. Umber, 315. " Burnt, 341. " grounds primed with, 316. " Raw, 315. Unnecessary mixture, 35. Uranium Brown, 360, " Green, 291. " Orange, 260. " Red, 179. " Yellow, 123. Ure, Dr., 73. V. Vanadium Green, 291. Vandyke, 11, 150, 220, 351. " Brown, 351. Van Eyck, 167. Varnishes, 33, 152. Vegetal charcoal, 398. Vehicles with pigments, 48-53. Velasquez, 389. Venetian Green, 283. " Lake, 137. " painters, painting, and pigments, 7, 8, 34, 37, 139, 167. " Red, 149. " White, 75. Verde Vessie, 282. Verdetto, 283. Verdigris, 51, 276. " Burnt, 331. " Distilled, 276. Verditer, Blue, 228. " Green, 287.