Daintree, on deposition of gold from chloride, 51
Diamond drilling, 173
Directors of companies, 114 et seq.
Dolly, 152
Drift, Origin of gold in, 49
Dry blowing, 18
Dugout, 128
Duncan pan, 91
Electricity as a motive power and transmitter, 111, 112
Electrolytic process of extracting gold, 96-99
Eurieowie, Tin at, 32
Fire, Mode of producing, 137
Fire-lute, 166
Flooded Stream, How to cross a, 138
Flumes, 63
Forge, Temporary, 140
Freezing-points, 184
Fuels, Heat values of, 184
Furnaces used in calcining, 101 et seq.
Fusing points, 184
Gold, Value of, 1;
Origin and sources of, 2-7;
Prospecting for, 13 et seq.;
Signs of, 26;
Assaying, by amalgamation, 30;
associated with tin ores, 32, 33;
Relation of, to volcanic action, 36;
its probable mode of occurrence in early geological times, 38, 39;
Mode of deposition in quartz, 39, 55, 57;
Formation of sulphides of, 39, 40;
Precipitation of, in pyrites, 41, 42, 51-54;
Solution of, by mine water, 42;
Opinion as to growth of, in drift deposits 48;
Daintree on its deposition from chloride, 51;
Wilkinson on its precipitation on iron pyrites, 51, 52
Gold (Alluvial) Origin of, 17, 49, 50, 51;
Prospecting for, 17
Gold extraction, 11, 12, 59 et seq.;
necessity of scientific procedure, 60;
German organisation, 60;
early methods, 61;
modern methods, 61 et seq.;
mills and crushers, 66-72;
power and water for batteries, 73, 74;
stamp mills, 76-78;
screens, 78;
blanket tables, 79;
treatment of pyritous ores, 80;
mode of saving the gold, 81;
treatment of ferruginous ores, 82;
cleaning and scaling plates, 83;
retorting amalgam, 84-86;
percussion tables, 88;
pan concentrators, 90;
amalgamators, 91-93;
lixiviation, 93 et seq.;
calcination, 100 et seq.;
how to avoid loss in cleaning up, 148
Gold-field, Mount Brown 17, 18
Grusonwerk ball mill, 71
Gutters, 20
Heated bearings, Cooling compound for, 163
Heat values of fuels, 184
Horse-power of engines, 144
amount required for pumping water, 172
Horse-shoe furnace, 103
Howell-White furnace, 104, 105
Huntingdon mill, 69
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
Johnson, experiments on deposition of gold, 55-57
Lamp, Slush, 139
Leads, Course of, 19
Le Conte, on ore deposits, 36, 37
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;
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
Machinery, Protection of, from rusting, 166
Mear’s process, 94
Measuring inaccessible distances, 157;
the width of a river, 157, 158;
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
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;
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
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
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
Pyritous ore, Mode of treatment of, 80
Quartz veins, Rosales’s igneous theory of, 34;
Rainfall, 178
Reef. See Lodes
Retort for small quantities of amalgam, 142;
and of mercury, 143
Reverberatory furnaces, 101 et seq.
Right angle, 158
Rivers, To measure width of, 157, 158
Robbery in gold-mills, Mode of preventing, 124-126
Ropes, Durability of, 173;
Qualities of, 190
Rope-splicing, 166
Rosales on origin of quartz veins, 32-34
Rotomahana district, White and Pink Terraces in, 36
Rust, Solvent for, 165;
Protecting iron and steel from, 165
School of Mines, S. Australian, 118
Depth of, 162;
Connection of, with underground workings, 176;
Data connected with, 177
Sheet-iron, Thickness and weight of, 189, 190
Shutes, Explanation of, 43
Signs, 185
Silica terraces in the Rotomahana district, 36
Silvering copper plates, 149
Skey, experiments on formation of sulphides, 39, 40;
and on their properties, 41
Sluice plates, 156
Smelting, Rough, 141
Soap, Serviceable, 138
Square roots, 191
Squares, 191
Power for, 147
Steel, How to prevent rust in, 165
Stetefeldt shaft furnace, 106
Stream tin, 32
Sulphide of gold, Formation of, 39, 40, 45, 46
Sulphides, Experiments on properties of, 41, 42, 53;
calcination of, 100 et seq.
Tank, to find contents of, 189
Telegraphic code, 138
Tent, 128-130
Thames gold-field, Siliceous sinter in, 36
Thermometer scales, Table of, 184
Thwaite-Denny furnace, 105, 106
Thwaite power gas system, 110
Thwaites’ furnace, 102
Timber, Data as to, 174
Tin, Minerals mistaken for, 32;
How to distinguish them from, 33
Tin-mines at Mount Bischoff, 24
Tin ores, 32
Tree, To measure height of, 160
Vein, to find lost part of, 167
Velocity of falling fluids, 188
Wages, Table for calculating, 192
Washing table, 79
Roots as a source of, 134, 135;
Filtering of, 135;
Mode of supplying, to stamper boxes, 146;
Plan for raising, 163;
Data regarding, 171;
Fresh and Salt, compared, 188;
Pressure of, 189
Water bag, 136
Waterless power, 109-112
Watson & Denny pan, 90
Weight of materials, 180
Weights and measures, 186, 187
Welcome Stranger nugget, 54
Wilkinson, on deposition of gold in iron pyrites, 51, 52
Windlass, 153
Woodside nuggets, 57
Printed by Ballantyne, Hanson & Co.
Edinburgh & London
A SELECTION FROM
CHARLES GRIFFIN & CO.’S PUBLICATIONS
OF
SCIENTIFIC AND TECHNICAL WORKS.