268 INDEX. 
Coal, cannel, what, why so called, and uses of, 157 
, stone, Kilkenny, or Glance, and Welsh, 158 
, Bovey, or brown, 158 
, pitch, 158 
, parrot, 157 
Cobalt, account of, whence obtained, and uses of, 220 
, oxide of, 221 
Coke, uses of, 156 
Copper, description and ancient uses of, 183 
mines of Anglesea described, 183 
, how extracted from the ore, &c. 183 
, uses of, 185, 186 
vessels, in what respects pernicious, 185 
', oxide of, uses of, 186 
, alloys of, 186 
, white, of what made, and uses of, 188 
-, how to gild, 172 
-, sulphat of. See Vitriol, white. 
Copperas. See Vitriol, green. 
Cornish diamonds, 47 
Corrosive sublimate, what it is, and uses of, 177 
Corundum, description and uses of, 34 
Crystal, description and uses of, 45 47 
, where found, how wrought and polished, 46, 47 
Culm, what it is, and the uses of, 157 
D. 
Derbyshire spar. See Fluor spar. 
Diachylon plaster, how made, and uses of, 206 
Diamond, description of, 23 
, where found, how obtained, and how known, 23, 24 
', properties of, 24 
, how cut, polished, and set, 26 
- , value and uses of, 26, 27 
, account of several remarkable diamonds, 27, 28, 29 
, Buxton, Cornish, and Carrara diamonds, 47, 102 
Drawing slate. See Black chalk. 
Dropping well at Knaresborough, 113 
Dutch gold, how made, 187 
Dykes, mineral, 3 
Earth, 14 
Earthen-ware, how manufactured, 71 
Eau-de-luce, of what made, 164 
Egyptian pebble, description and uses of, 61 
Electron of the ancients, what it was, 162 
Emerald, description of, where found, how set, and how valued, 38 
, oriental, 32 
, false, 49 
