INDEX

A Accumulators or secondary batteries, 65 Aerial craft experiments, 202 Aerobic and Anaerobic bacteria, 234 Afterdamp, 228 Alcohol as a fuel, 49 Alternating current, 35, 193 Altofts, artificial coal mine at, 139 Aluminium, 133 Amalgam, 117 Ammeters, 25 Ammonia in making ice, 72 Ammunition for big guns, 240 Amperes, 22, 24 Analysis and synthesis, 43 Anode, 55 Anschutz, Dr, 96 Antennæ, 162, 171 Anthracene oil, 48 Arc, the, in wireless, 165 Argon, the gas, 75 Artesian wells, 45 "Atmosphere," a unit of measure, 72 Atoms, 56 "Avogadro's Constant," 33 B Bacteria, beneficent, 234 Ball mill, the, 115 Battery, electrical, 23 Benzine, 45, 48 Bessemer, Sir H., 236 Blowpipe, oxyhydrogen, 120 Board of Trade Unit, the, 22 Boiling water, 10, 76 Bore of a gun, 236 Boulders, blasting, 20 Branly, 166 "Brattice cloth," 224 Breech of a big gun, 240 Brennan torpedo, the, 102 Brewing, 50 "Brine" in machine-made cold, 70 "Budding" of yeast, the, 51 C Calibre of a gun, 236 "Capacity," 153 Capacity and inductance, electrical properties, 161 Carbolic oil, 48 Carbon, 11 Carbonic acid gas, 10 Carburetter, the, 46 Cardiograms, 32 Caselli, 176 Cathode, 55 Cavendish, investigations of, 73 Cellulose, 12, 44 Centrifugal tendency, 115 "Character" of a lighthouse, 86 Charge and current, 32 Cheddite, 13 Chemicals in waterworks, 232 Chemistry, organic and inorganic, 42 Chlorate of potash, 12 Chloride of soda, 58 Chronograph, the, 141 Clark's Cell, 23 Coal and oil, 47 Coal, burnt, 10 Coal-dust an explosive, 10 Coal-dust, explosions from, 139 Coal-pitch, 48 Coal-tar, 48 "Coasting" lights, 80 Coherer, the, 103, 162, 167 Coke in smelting, 125 Colliery explosions, 137 Colliery explosions, rescue apparatus, 226 Colours of the spectrum, 213 Colours of flowers, 213 Compass, a ship's, 91 Compressed air in torpedoes, 100 "Concentrates," 115 Condensers in wireless, 163 Conservation of energy, 132 Contact makers, 145 Coronium, the gas, 74 Corundum, 134 Coulombs, 23 Courrières colliery disaster, 221 Creosote, 48 Creosote oil, 48 Crooks, Sir W., 33 Crushing mills, 115 Crystal detectors, 171 Curie, M. and Mme., 33 Curtis and Harvey, 9 Cyanide process, the, 118 Cyanogen, 118 Cymogene, 45 D Detectors, 167 Detonator, the, 14 Dextro-glucose, 51 Diamonds, 135 Diesel engines, 46 Direct-current electric motor, 191 "Dirt-auger," the, 15 Ditches, blasting, 18 Drainage, 233 Du Pont Powder Company, 9 Duddell, W. H., 37 Dufay dioptichrome process, 219 Dynamite, what it is, 9, 12; in agriculture, 13; firing a charge, 16; fruit trees, 16; marshy ponds, 17; ditches, 18; tree stumps, 19; boulders, 19; wells, 20 Dynamo, the, 65 E Eddystone Lighthouse, 80 Edison's accumulator, 66 Einthoven, Prof., 30 Electric arc, the, 123 Electric furnace, 125 Electric fuse, the, 16 "Electrical Inertia," 153 Electrical battery, 23; pressure, 23; cells, 23; measure, 24; magnetism, 25 Electricity, 22; the current, 56; electro-plating, 58; purification of metals, 61; secondary batteries, 62 Electrode, 55 Electrolysis, 55, 170; in drainage, 234 Electrolyte, 55 Electrometer, the, 32, 34 Electro-plating, 58 Electros, 60 Electroscope, the, 34 Endosperm, the, 50 Engines driven by oil fuel, 46 Enzymes, 50 Ether, 45, 149 Ethyl alcohol, 49 Explosions, 9; in mines, 137 Explosive link, the, 104 Explosives for guns, 237 F "Falls" in a coal mine, 223 Fermentation, 50 Fessenden, R. A., 169 Field guns, 241 Filters in waterworks, 232 Fire-damp, 137 Firing-pin of torpedo, 102 Flashing lights, 81 Fog, effects of, 82 Fog signals, 88 "Fractional distillation," 76 "Frequency," 36 Frequency meter, 193 Friction clutch, 195 "Frue" vanner, the, 116 Fruit trees and dynamite, 16 Fuses, firing, 20 G Galvanometer, the, 27, 170 "Gangue," the, 112 Gauges, 208 Gelignite, 12 Glycerine in explosives, 11 Gold, 110 Guiding lights, 81 Gyroscope, the, 93, 100 H Half-tone illustrations, 181 "Hard-pan," 14 Harris, Sir W. S., 36 Hawke and Olympic, collision between, 198 "Head" of the torpedo, 99 Heat and electricity, 37 Heat of the electric arc, 123 Heat, testing by, 205 Helium, 33, 75 Hertz, 154 Howitzers, 241 Hughes, Prof., 159 Humphrey Gas Pump, 231 Hydraulicing, 112 "Hydro-carbons," 45 Hydrogen, liquid, 73 Hydrometer, the, 65 Hydrostatic valve of torpedo, 101 "Hyper-radial" apparatus, 88 I Ice, machine-made, 71 Indigo, synthetic, 44 Inductance, 154 Induction coil for wireless, 162 Induction furnaces, 129 Insulating ink, 177 "Interference" of light waves, 159 Ionisation of the atmosphere, 172 Iron, 109 J Jupiter's moons, 150 K Kelvin, Lord, 28 Kerosene, 46 Kieselguhr, 12 Kilowatt, the, 25 Kinematograph in coal mine experiments, 146 Korn, Prof., 183 Krypton, the gas, 75 L Leclanche cell, the, 23 Leyden jar, the, 153 Light, speed of, 151 Light waves, 151 Lighthouse, the, 78 Lighthouse lamp, the, 83 Limit gauges, 209 Liquid air, 73 Lodge, Sir O., 159, 161 Lumière autochrome process, 216 M Magnetic detector, the first, 168 Magnetic pole, the, 90 Magnetism, 25 Magnets, 25 "Making" light, the, 79 Maltster, the, 50 Mansfield Rescue Station, the, 224 Marconi, 161 Marshy ponds, to remove by dynamite, 17 Mash tun, the, 50 "Master compass," the, 97 "Master" records, 60 Maxwell, J. C., 152 Measuring by electrolysis, 62 Mendeluff's table, 74 Mercury, 114 Metallographic testing, 205 Metals, testing, 204 Methane gas, 10, 124 Methyl alcohol, 49, 53 Microbes, their use, 43 Mine-laying, 105 Mine-sweeping, 107 Molecules, 56 Morris, William, 233 Mud, gold from, 122 Muirhead, Dr, 167 Murette or pedestal of lighthouse lamp, 85 N Naphtha, 45 National Physical Laboratory, 199 Natural frequency, 161 Neon, the gas, 75 Nickel chrome gun steel, 239 Nitric acid, 11 Nitro-cotton, 12 Nitro-glycerine, 11 Nitrogen gas, 9 Nobel, inventor of dynamite, 12, 135 Nodes, 157 O Ohm, the, 22, 24 Ohmmeter, the, 27 Ohm's law, 27 Oil, mineral, 44 Oil-producing countries, 47 Optical apparatus of lighthouse, 86 "Orders" of lighthouse apparatus, 88 Ores, 110 Orthochromatic plates, 212 Oscillations, electrical, 36 Oscillatory circuit, 154 Oscillograph, Duddell's, 39 Oxide of iron, 133 Oxyacetylene flame, the, 131 Oxygen gas, 10 Oxyhydrogen jet, 130 P Paraffin wax, 45 Patents, 174 "Periodicity," 36 "Personal equation," the, 207 Petrol, 45, 52 Petroleum, 44 Phonograph, the, 60 Plans of a ship, 199 Plates of the secondary battery, 64 Platinum, 184 Plumbago in plating, 59 Poulsen arc, the, 173 Poulsen, Valdemar, 165 Pressure gauges, 143 Priestly, investigations of, 73 Primary colours, 213 Prisms, reflection of, 85 Process blocks, 186 Projectiles, velocity of, 237 Propellers of the torpedo, 99 Propellers, testing aerial, 203 Prout's anonymous essay, 74 Prussiate of potash, 177 Purification of metals, 62 Q Quadrant electrometer, the, 35 Quartz, 113; fibre, 31, 131 R Radium, 33 Ramsey, Sir W., 75 Range-finding, 240, 242 Rayleigh, Lord, 74 Receiving instruments for wireless, 162 "Record" vanner, the, 116 "Rectifier," the, 37, 171 Red rays of light, 82 Reflection by prisms, 84 Reflectors, lighthouse, 84 Reiss electrical thermometer, 36 Repeated-impact testing machine, 204 Rescue teams for colliery accidents, 221, 222 Resistance welding, 126 "Resonance," an experiment, 160 Reviving apparatus for coal mines, 229 Rheostat, the, 188, 191 Rhigolene, 45 Rifling of a gun, 239 Rubber, synthetic, 44 Rubies, artificial, 131 Rudders of a torpedo, 100 Rutherford, Prof., 33, 168 S Saccharine, 48 Saltpetre, 12 Schwartzkopff torpedo, the, 99 Scilly Island lighthouse, 80 Sea, gold in the, 120 Secondary battery, the, 62 "Sectors," 81 Selenium, 184 "Self-rescue" apparatus, a, 228 Shale, oil from, 45 Shells for guns, 239 Ships, testing by models, 200 Short circuit, 179 "Shunt," the, 165 Sighting a big gun, 241 Silica, 133 Skating rinks, ice in, 71 "Sludge" and "effluent" of drainage, 233 Spark detectors, 166 Spark-gap, 162 Spectrum, the, 213 Spinthariscopes, 33 Spirits, 52 Springs, testing, 203 Stamps for crushing quartz, 113 Starch grains in colour photography, 217 "Step-down" and "step-up" transformers, 127 "String galvanometer," the, 30 Submarine mines, 104 Submarine telephone, 88 Sulphuric acid, 11, 43 Sunlight, composition of, 213 Synchronism, difficulties of, 182, 191 Synthetic substances, 44 T "Tamping," 15 Tank for testing at Teddington, 201; New York harbour, 201 Telautograph, the, 180 Telectograph, the, 180, 185 Telegraph key for wireless, 162 Telewriter, the, 187 Temperature, measuring, 38 Tesla, Nicola, 164 Testing by heat, 205 Testing machines, 206 Thermit, 135 Thermo-couple, the, 38 Thermo-galvanometer, the, 37 Thomson Mirror Galvanometer, the, 28 Thomson, Prof., S., 159 Torpedo, the, 98 Training station at Porth, 225 Transformer, the, 127 Transmitting instruments, 163 Travers, Prof., 75 Tree stumps, blasting, 19 Tuning-fork a standard of speed, 193 Turret of a battleship, 240 U Ultra-microscope, the, 209 Ultra-violet rays, 172 V Varley and the Atlantic cable, 28 Vaseline, 46 Veins or lodes, 113 Vickers, 202 Voltmeter, the, 26 Volts, 22, 24 W Water a source of heat, 124 Water, soft and hard, 232 Watt, the, 24 Waves caused by ships, recording, 200 Wax models of ships, 199 Welding by electricity, 125 Wells, blasting, 20 Welsbach mantle, the, 124 Whitehead, 99 Wire guns, 238 Wireless telegraphy, 161, 173 Wireless torpedo, the, 102 Wood-meal in explosives, 12 Wood spirit, 49 "Working fluid," the, 68 Y Yeast, 51 Z Zero, 68 Zinc in gold recovery, 119

FOOTNOTE:

THE RIVERSIDE PRESS LIMITED, EDINBURGH 1917