Hydraulicing, 62, 65 Hydraulics, 171 Hydro-thermal origin of early deposits, 37, 38 I 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 J Johnson, experiments on deposition of gold, 55-57 L Lamp, Slush, 139 Leads, Course of, 19 Le Conte, on ore deposits, 36, 37 Lemichel syphon, 66, 67 Lenticular lodes, 24, 25 Levelling instruments, 160, 161 Living places, 127-130 Lobley, on gold, 36 Lodes, nature of, 8-10; prospecting for, 22; grass as an indicator of, 22; not of igneous origin, 23; Quartz fragments as indicators of, 23; Usual trend of, in Australia, 23; Sinuous outcrops of, 25, 26; Determining the value of, 26, 28, 31; Underlie of, in Australia, 27; Explanation of shutes in, 43; why junctions of, are richest in metallic ores, 44; proofs of their being formed now, 44; Newbery, on gold in pyritous lodes, 47; Double faulting of, 72 Lode tin, 32 Long tom, 62 Loss in blasting, How to prevent, 142 M Machinery, Protection of, from rusting, 166 Mear’s process, 94 Measuring inaccessible distances, 157; the width of a river, 157, 158; height of a tree, 159, 160; height of objects, 161 Medicine case, 136 Mensuration, 175 Mercury, Retort for small quantities of, 143; Mode of supplying, to mortar boxes, 145 Mercury extractor, 155 Metals, 33 Mine managers, 115 _et seq._ Mine surveying problems, 176 Mining regulations, 194-201 Misfires, How to deal with, 141 Molesworth furnace, 106 Monitor, 64 Mount Bischoff tin mine, 24 Mount Brown gold-field, 17, 18 Mount Morgan gold mine, 23, 94, 95 Mount Shoobridge, Tin at, 32 N Names of common chemical substances, 183 Newbery, Experiments by, on modern growth of lodes, 44, 45, 53; on gold in pyritous lodes, 47; experiments in depositing gold on sulphides, 52, 53 Newbery and Vautin process, 94 New machines and processes, Advice as to adoption of, 120-122 New Zealand, Mining regulations of, 201 Northern territory hammock, 130-132 Nuggets, Position of, 17; Formation of, 17; Origin of, 50, 53-58 O Ore Deposits, Le Conte’s conclusions as to, 36, 37 Ore reserves, Calculation of, 168-170 Ore values, Estimating, 170 Organic matter as a precipitant of gold, 51, 52, 53 Otto engines, 110, 111 P Percussion tables, 88 Pipes, How to clear, 164 Plants as a source of water, 134, 135 Plattner process, 94 Plummer blocks, Cleaning greasy, 163 Pollok process, 95 Power for mills, 147 Prospect, First, 29; Determining value of, 29, 30, 31 Puddlers, 153-155 Pump, 155, 171 Purchase of mines, Advice as to, 123 Pyrites as a precipitant of gold, 41, 42, 51-54; Modern deposition of, 45; Mode of occurrence of gold in, 46, 47