278 INDEX. 
Tobacco pipes, how made, 73 
, Turkish, of what made, 84 
Topaz, description of, where found, and how obtained, 35, 36 
, value, uses, and properties of, 36 
, Oriental, 32 
-, Brasilian, Saxon, Bohemian, blue, pink, white, or Nova 
Mina, 37 
Tourmaline, description and properties, and uses of, 40 
Trap, primitive, 228 
Tripoli, description and use of, 76 
Tufa, description and uses of, 113, 114 
Turkey stone, description and uses of, 81 
Turquoise, description of, how imported, and uses of, 189 
, spurious .kind, how detected, 190 
Tulenag, of what made, and uses of, 210 
U. 
Ultramarine, how made, and uses of, 68 
Umber, description and use of, 199 
V. 
Verde antique marble, 102 
Verdigris, how made, and uses of, 186 
/distilled, what, and uses of, 186 
Vermilion, what it is, and how made, 177 
Vesuvian, description and use of, 43 
Vienna white, of what made, 100 
Vitriol, blue, description of, how made and uses of, 14O 
, green, or iron vitriol, 199 
, white, 141 
, pleasing experiment with, 142 
y spirit of. See Sulphuric acid. 
W. 
Water, uses and analysis of, 238, 239 
, rain, description and properties of, 240 ^ 
, ice and snow, description, properties, and fises of, 240 
, spring, river, and stagnant, 241 245 
', putrid, how to render sweet, 243 
. , sea, 244 
, Malvern, 246 
, Bristol Hot-well, 246 
, Matlock and Buxton, 248 
, Bath, 249 
., Aix-la-Chapelle, or Aken, $50 
, Borset, 252 
, Vichy, 253 
, Carlsbad, 254. 
