Sentence Examples


  • Galena occurs in veins in the Cambrian clay-slate, accompanied by copper and iron pyrites, zinc-blende, quartz, calcspar, iron-spar, &c.; also in beds or nests within sandstones and rudimentary limestones, and in a great many other geological formations.
  • The materials employed are sand, sulphate of soda, nitrate of soda, calcspar and in some works carbonate of barium.
 
 

Also Mentioned In