A Text-book of Ore and Stone Mining

adit auriferous beds borax bore-hole boring Boryslaw bottom Broken Hill carbonic acid carried cast-iron cent chalcopyrite cinnabar clay coal compressed air Comstock lode consists containing copper Cornwall cubic cylinder deposits depth diamond district drill driven employed engine excavation explosives fault feet fissures galena Geol gold granite gravel ground hæmatite hole horizontal inclined Inst iron pyrites ironstone Jour limestone lode lower machine magnetic Mansfeld mass Mechernich metal method metres miles mineral mineral veins mines Mount Morgan oxide ozokerite particles phosphate pipe piston produced pulley pump quantity quarries quartz quartzite quicksilver rock rope salt sand sandstone SCALE schist screw seam shaft shale side silver slate sometimes steam steel stockwork stone stopes strata strike sulphides sulphur surface thick timber tons Trans tube tunnel underground valve ventilation vertical waggon whilst wire yards