INDEX. 267 
Bottles, how made, 55 
Brass, how made, and uses of, 187 
wire, properties and uses of, 187 
Bricks, how made, 72 
Brimstone , See Sulphur, 
Bristol diamonds, 47 
Bronze, how made, and uses of, 187 
Burning spring, description of one in Shropshire, 147 
Burr-stone, or mill-stone, description of, 44 
< , where found, uses of, and how split, 45 
Buxton diamonds, 47 
C. 
Cachalong opal, description and use of, 65 
Calamine, description and uses of, 209 911 
Calcareous substances, 17, 97 
Calcedony, description and uses of, 56, 57 
Calcium, 18 
Calomel, how made, and uses of, 177 
Caloric, 9 
Calp. See Lias. 
Caoutchouc mineral, 149 
Carbon, 20 
Carbonats, 13 
Carbonic acid, 12 
Carbuncle, 43 
Carnelian, description, uses, and value of, 57 
Cat's-eye, description of, how cut, and uses of, 50 
Cave of Fingal, account of, 96 
Cairn gorum crystal, whence obtained, how wrought, and uses of, 49 
Ceruse. See White lead. 
Chalk, description and uses of, 99 
" *-, black, description and uses of, 80 
-, red, how prepared, and uses of, 199 
Chinese grotesque figures, of what made, 84 
Choke damp in coal-mines, what it is, how produced, and how t 
prevent the injurious effects of, 154 
Chrysoberyl, description, value, and uses of, 35 
Chrysolite, description of, how cat, and uses of, 95 
Chrysoprase, description of, how cut, imitations, and uses of, 58, 59 
Cinnabar, artificial, how manufactured, and use of, 177 
Cinnamon stone, 44 
Clay, various kinds, description and uses of, 7.1, 72 
Clay-slate. See Roofing- slate. 
Coal, description of, where found, and value of, 151 
mines, account of, 152 
1 trade, history, &c. of, 154 156 
, supposed origin, and various uses of, 15 
N2 
