Precipitate—Matter separated from a solution.
Pulp—Pulverized ore mixed with water.
Quarry—An open working.
Quartz—Silica.
Quartzose—Containing a large proportion of quartz.
Reduce—To turn ore into metal by taking away oxygen.
Riffle—A groove or strip to catch gold and mercury in a sluice.
Roasting—Heating in contact with air.
Shaft—A pit giving access to a vein or working.
Stratum—Bed or layer.