266 INDEX. 
Antimonial powder, of what composed, 217 
wine, how prepared, and use of, 217 
Aqua marine, description, value, and uses of, 39, 40 
, where found, how cut and set, 40 
- fortis, mode of manufacturing, and uses of, 138 
regia, of what made, 139 
Argil, 15 
Arsenic, description of, and whence obtained, 212 
., how prepared for use, and the uses of, 213 
, poisonous effects of, how counteracted, 215 
, how to know from any other substance, 213 
Asbestos, use of, for making incombustible cloth, &,c. 93, 94 
Asphalt, description of, where found, and uses of, 149, 150 
Avanturine, description, uses, and value of, 50 
, imitations of, how made, 50 
Axestone, description and use of, 89 
Azure stone, description and uses of, 67, 68 
, imitation of, how made, 68 
B. 
Barilla. See Soda. 
Barium, 17 
Barytes, description and uses of, 120 
, sulphat of, 121 
Basalt, description and uses of, 95, 96 
Bath stone, description and uses of, 114 
Bell metal, of what made, 188 
Beryl. See Aqua marine. 
Betton's British oil, what it is, 146 
Biscuit porcelain, what it is, and how made, 75 
Bismuth, description and uses of, 217, 218 
- -, singular fusible metal prepared from, 218 
, experiment with, illustrative of metallic crys f 
Bitumen. See Asphalt, 149 
, elastic, 149 
Black chalk, description and use of, 80 
i pencils, how made, 80 
Black tin, what it is, 200 
Bloodstone, description and uses of, 59 
-, singular specimen of, 59 
Blue John. See Fluor spar. 
Blende, 209 
Bole, description and uses of, 87 
Bologna phosphorus, or Bononian stone, how prepared, and pro- 
perties of, 121 
Boraciccid, 13 
Borax, description of, whence and how obtained, 134 
.-, preparation and uses of, 135 
