Hydraulics, [171]
Hydro-thermal origin of early deposits, [37], [38]
Interest Tables, [193]
Iron, prevention of rust on, [165]
Iron extractor, [148]
Iron sheets, size and weight of, [189]
Ironstone “blows” as indicators of lodes, [26]
Hydraulics, [171]
Hydro-thermal origin of early deposits, [37], [38]
Interest Tables, [193]
Iron, prevention of rust on, [165]
Iron extractor, [148]
Iron sheets, size and weight of, [189]
Ironstone “blows” as indicators of lodes, [26]