Drill, Electric 191Drip Loop 192Driving Horns 192Dronier's Salt 192Drooping Characteristic 114Drop, Annunciator 35Drop, Automatic 192Drop, Calling 98Drum Armature 45Drum, Electric 193Dry Battery 63Dry Pile, Zamboni's 581Dub's Laws 193Duct 193Duplex Bridge Telegraph 506Duplex Cable 96Duplex Differential Telegraph 507Duplex Telegraph, 506Duration Contraction, Kathodic 312Duration of Electric Spark 490Dyad 193Dyeing, Electric 193Dynamic Electricity 193Dynamic, Electro- 211Dynamic Induction, Magnetic 347Dynamo, Alternating Current 193Dynamo, Alternating Current Regulation of 195Dynamos, Battery of 68Dynamo, Commercial Efficiency of 195Dynamo, Compound 195Dynamo, Coupling of 201Dynamo, Curve of 173Dynamo, Dead Turns of a 551Dynamo, Direct Current 197Dynamo, Disc 197Dynamo-electric Machine 197Dynamo, Electroplating 198Dynamo, Equalizing 198Dynamo, Field and Armature Reaction of 450Dynamo, Far Leading 198Dynamo or Magneto-electric Generator, Flashing in a 257Dynamo, Inductor 199Dynamo, Interior Pole 199Dynamo, Iron Clad 200Dynamo, Ironwork Fault of a 308Dynamo, Motor 200Dynamo, Multipolar 200Dynamo, Non-polar 200Dynamo, Open Coil 200Dynamo, Overtype 399Dynamos, Regulation of 455Dynamo, Ring 200Dynamo, Self Exciting 201Dynamo, Separate Circuit 201Dynamo, Separately Excited 201, 479Dynamo, Series 201Dynamo, Shunt 202Dynamo, Single Coil 202Dynamo, Tuning Fork 202Dynamo, Unipolar 202, 553Dynamograph 199Dynamometer 200Dyne 203Earth 203Earth Coil 133Earth Currents 166Earth, Dead 176, 203Earth, Magnetization by 359Earth, Partial 203, 404Earth Plate 203Earth Return 203Earth's Magnetism, Components of 356Earth, Solid 203Earth, Swinging 203Earth, Total 203Ebonite 203Eccentric Iron Disc Ammeter 27Economic Coefficient 130, 204, 205Eddy Currents 163Eddy Displacement Currents 162Ediswan 204Edison Effect 204Edison-Lalande Battery 69Eel, Electric 204Effect, Acheson 208Effect, Counter-inductive 204Effect, Cross-magnetizing 158, 298Effect, Edison 204Effect, Faraday 249Effect, Ferranti 251Effect, Hall 284Effect, Joule 311Effect, Kerr 235, 312Effect, Mordey 381Effect, Page 401Effect, Peltier 404Effect, Photo-voltaic 415Effect, Seebeck 478Effect, Skin 486Effect, Thomson 538Effect, Voltaic 563Efficiency 204Efficiency, Commercial 204Efficiency, Electrical 205Efficiency, Gross 205Efficiency, Intrinsic 205Efficiency, Net 205Efficiency of Conversion 205Efficiency of Secondary Battery Quantity 205Efficiency of Secondary Battery, Real 205Efflorescence 206Effluvium, Electric 206Egg, Philosopher's 409Elastic Curve 206Elasticity, Electric 206Electrepeter 206Electric, Absolute, Potential 429Electric Absorption 8Electric Actinometer 11Electric Alarm 17Electrical Classification of Elements 237Electrically Controlled Valve 558Electric Ammunition Hoist 29Electric Analysis 32Electric Analyzer 32Electric Annealing 34Electric Annunciator Clock 127Electric Arc Blow-pipe 84Electric Aura 53Electric Automatic Fire Extinguisher 257Electric Axis 54Electric Balance 577Electric Bath, Bipolar 57Electric Bath, Multipolar 57Electric Bath, Unipolar 57Electric Bell 79Electric Bell, Automatic 78Electric Bioscopy 82Electric Blasting 83Electric Bleaching 83Electric Boat 84Electric Boiler Feed 84Electric Branding 87Electric Brazing 87Electric Breath Figures 89Electric Breeze 89Electric Buoy 93Electric Candle 99Electric Case Hardening 109Electric Cautery 109Electric Chimes 118Electric Chronograph 118Electric Circuit, Active 123Electric Clock, Self-winding 128Electric Coil 133Electric Column 139Electric Contact 147Electric Convection 149Electric Convection of Heat 149, 286Electric Counter 156Electric Crucible 158Electric Crystallization 158Electric Death 177Electric Density 115Electric Dental Mallet 180Electric Diapason 182Electric Displacement 189Electric Door Opener 190Electric Double Refraction 454Electric Drill 191Electric Drum 193Electric Dyeing 193Electric Eel 204Electric Efficiency 205Electric Effluvium 206Electric Elasticity 206Electric Endosmose 238Electric Energy 239Electric Energy, Coefficient of 205Electric Energy, Systems of Distribution of 190Electric Engraving 245Electric Entropy 242Electric Etching 245Electric Evaporation 246Electric Excitability of Animal Systems 247Electric Exosmose 247Electric Expansion 247Electric Fire Alarm, Automatic 257Electric Floor Matting 369Electric Fluid 258Electric Fly or Flyer 259Electric Fog 259Electric Furnace 263Electric Fuse 264Electric Gas Burners 93Electric Headlight 285Electric Head Bath 284Electric Heat 285Electric Heater 286Electric Horse Power 290Electric Image 296Electric Incandescence 297Electric Influence 305Electric Insulation 305Electricities, Separation of 479Electricity 206Electricity, Animal 33Electricity, Atmospheric 51Electricity, Cal 208Electricity, Conservation of 146Electricity, Contact 147Electricity, Dissimulated 189Electricity, Dynamic 193Electricity, Frictional 262Electricity, Latent 323Electricity, Negative 389Electricity, Plant 317Electricity, Positive 428Electricity, Specific Heat of 491Electricity, Static 493Electricity, Storage of 495Electricity, Voltaic 563Electricity, Vitreous 562Electric Machine, Plate 417Electric Machine, Wimshurst 577Electric Mains 367Electric Mass 368Electric Matter 368Electric Meter, Chemical 375Electric Meter, Thermal 375Electric Meter, Time 375Electric Mortar 382Electric Motor 382Electric or Electrostatic Capacity 102Electric Organ 397Electric Oscillations 398Electric Osmose 398Electric Pen 405Electric Pendulum 405Electric Piano 415Electric Picture 415Electric Pistol 416Electric Popgun 282Electric Portrait 415Electric Potential Difference 429Electric Potential, Unit of 432Electric Power 433Electric Pressure 434Electric Probe 435Electric Prostration 437Electric Protector 437Electric Radiometer 447Electric Ray 450Electric Rectification of Alcohol 18Electric Reduction of Ores 453Electric Reduction of Phosphorous 410Electric Register 454Electric Residue 116, 460Electricity, Resinous 461Electric Resonance 468Electric Resonator 470Electric Rings 392Electrics 208Electric Saw 476Electric Screen, 476Electric Shadow 480Electric Shock 482Electric Shower Bath 57Electric Soldering 487Electric Spark, Duration of 490Electric Sphygmophone 491Electric Storms 495Electric Striae 496Electric Subway 496Electric Subway, Underground 552Electric Sunstroke 497Electric Superficial Density 180Electric Swaging 499Electric Tele-barometer 504Electric Telemanometer 521Electric Telemeter 521Electric Tempering 527Electric Tension 529Electric Thermometer 535Electric Thermostat 537Electric Torpedo 543Electric Tower 545Electric Transmission of Energy 240Electric Trumpet 550Electric Tube 550Electric Typewriter 551Electric Unit of Work 580Electric Varnish 559Electric Welding 574Electric Whirl 577Electric Wind 578Electrification 208Electrification by Cleavage 127Electrification by Pressure 434Electrified Body, Energy of an . 241Electrization 208Electro-biology 208Electro-capillarity 209Electro-chemical Equivalents 209, 244Electro-chemical Series 209Electro-chemistry 209Electro-culture 209Electrode 210Electrode, Indifferent 210Electrodes, Erb's Standard of 210Electrodes, Non-polarizable 210Electrodes, Shovel 483Electrode, Therapeutic 210Electro-diagnosis 181, 210Electro-dynamic 211Electro-dynamic Attraction and Repulsion, 211Electro-dynamic Rotation of Liquids 474Electro-dynamometer, Siemens' 212Electro-gilding 277Electro-kinetic 211Electrolier 212Electrolysis 212Electrolysis, Laws of 213Electrolyte 214Electrolytic Analysis 214Electrolytic Cell 109Electrolytic Clock 128Electrolytic Conduction 215Electrolytic Convection 149, 214Electrolytic Deposit 180Electrolytic Iron 308Electrolytic Resistance 464Electro-magnet 215, 337Electro-magnet, Annular 216Electro-magnet, Bar 217Electro-magnet, Club-foot 217Electro-magnet, Hinged 217Electro-magnet, Hughes' 291Electro-magnetic Ammeter 27Electro-magnetic and Magnetic Equipotential Surface 244Electro-magnetic Attraction and Repulsion 217Electro-magnetic Brake 86Electro-magnetic Clutch 128Electro-magnetic Control 218Electro-magnetic Eye 248Electro-magnetic Field of Force 218Electro-magnetic Force 260Electro-magnetic Gun 282Electro-magnetic Induction 218, 299Electro-magnetic Inertia 305Electro-magnetic Induction, Mutual 302Electro-magnetic Interrupter for Tuning Fork 307Electro-magnetic Leakage 219Electro-magnetic Lines of Force 219Electro-magnetic Liquids, Rotation of 475Electro-magnetic Meter 375Electro-magnetic Quantity 445Electro-magnetic Quantity, Practical Unit of 445Electro-magnetic Shunt .483Electro-magnetic Stress 219, 496Electro-magnetic Theory of Light 219Electro-magnetic Unit of Energy 220Electro-magnetic Vibrator 561Electro-magnetic Waves, 573Electro-magnet, Ironclad 219Electro-magnetism 220Electro-magnet, Joule's 337Electro-magnet, Long Range 220Electro-magnet, One Coil 219Electro-magnet, Plunger 220Electro-magnet, Polarized 220Electro-magnets, Interlocking 221Electro-magnets, Multiple Wire Method of Working 388Electro-magnet, Stopped Coil 221Electro-magnets, Surgical 222Electro-mechanical Bell 80Electro-mechanical Equivalent 244Electro-medical Baths 222Electro-medical Battery, Pulvermacher's 69Electro-metallurgy 222Electrometer 222Electrometer, Absolute 222Electrometer. Attracted Disc 223Electrometer, Capillary 224Electrometer Gauge 226Electrometer, Lane's 226Electrometer, Quadrant 226Electrometer, Thermo- 536Electrometer, Weight 223Electro-motive Force 227Electro-motive Force, Counter- 228Electro-motive Force Curve 170Electro-motive Force, Impressed 297Electro-motive Force, Motor 384Electro-motive Force. Oscillatory 398Electro-motive Force, Transverse 549Electro-motive Force, Unit 228Electro-motive Intensity 228Electro-motive Potential Difference 429Electro-motive Series 228Electro-motograph 229Electro-motor 229Electro-muscular Excitation 229Electro-negative 229Electro-optics 229Electrophoric Action 230Electrophorus 230Electro-physiology 231Electroplating 231, 418Electroplating Dynamo 198Electro-pneumatic Signals 231Electropoion Fluid 232Electro-positive 232Electro-puncture 232Electro-receptive 232Electroscope 232Electroscope, Bennett's 233Electroscope, Bohenberger's 233Electroscope, Condensing 233Electroscope, Gold Leaf 233Electroscope, Pith Ball 234Electrostatic Attraction and Repulsion 234Electrostatic Attraction and Repulsion. Coulomb's Law of 155Electrostatic Circuit 123Electrostatic Equipotential Surface 244Electrostatic Field of Force 254Electrostatic Force 260Electrostatic Induction 302Electrostatic Induction, Coefficient of 234Electrostatic Induction, Mutual 303Electrostatic Lines of Force 234Electrostatic Quantity 445Electrostatic Refraction 235Electrostatics 235Electrostatic Series 235Electrostatic Stress 236, 496Electrostatic Telephone 526Electrostatic Voltmeter 571Electro-thermal Equivalent 245Electro-therapeutics or Therapy 236Electrotonic State 493Electrotonus 236Electrotype 236Element, Chemical 236Element, Galvanic 264Element, Mathematical 237Element, Negative 390Element of a Battery Cell 237Element, Positive 277Elements, Electrical Classification of 237Elements, Magnetic 342Elements of Battery 63Elements, Thermo-electric 237Element, Voltaic 237Elias' Method of Magnetization 360Elongation 237, 540Elongation, Magnetic 344Embosser, Telegraph 237E. M. D. P. 238E. M. F. 238Energy 238Energy, Atomic 238Energy, Chemical 239Energy, Conservation of 239Energy, Degradation of 239Energy, Electric 239Energy, Electrical, Coefficient of 205Energy, Electric Transmission of 240Energy, Electro-magnetic, Unit of 220Energy, Kinetic 241Energy, Mechanical 241Energy Meter 375Energy, Molar 241Energy, Molecular 241Energy of an Electrified Body 241Energy of Dielectric 183Energy of Position 211Energy of Stress 241Energy, Physical 241Energy, Potential, or Static 241Energy, Radiant 446Energy, Thermal 242End-on Method 238End or Pole, Marked 368Endosmose, Electric 238End Play 238End, Unmarked 556English Absolute or Foot Second Unit of Resistance 465Engraving, Electric 245Entropy 242Entropy, Electric 242Epinus Condenser 242E. P. S. 243Equator, Magnetic 344Equator of Magnet 337Equipotential 244Equipotential Surface 498Equipotential Surface, Electrostatic 244Equipotential Surface, Magnetic and Electro-magnetic 244Equalizer 243Equalizer, Feeder 251Equalizing Dynamo 198Equivalent, Chemical 116, 244Equivalent Conductors 146Equivalent, Electro-thermal 245Equivalent, Joule's 311Equivalent Resistance 465Equivalents, Electro-chemical 209, 244Equivalent, Thermo-chemical 245Equivalent, Water 572Equivolt 245Erb's Standard of Electrodes 210Erg 245Erg-ten 245Error, Heating 286Escape 245Essential Resistance 465, 466Etching, Electric 245Ethene 397Ether 246Eudiometer 246Evaporation, Electric 246Ewing's Theory of Magnetism 356Exchange, Telephone 246Excitation, Electro-muscular 229Excitability, Faradic 246Excitability, Galvanic 247Excitability of Animal System, Electric 247Exciter 247Exosmose, Electric 247Expansion, Coefficient of 247Expansion, Electric 247Experiment, Franklin's 261Experiment, Hall's 284Experiment, Kerr's 312Experiment, Matteueci's 369Experiments, Hertz's 470Experiment, Volta's Fundamental 567Experiment with Frog, Galvani's 262Exploder 247Explorer 247Exploring Coil 350Explosive Distance 190Extension Bell Call 248Extension, Polar 423External Characteristic 114External Characteristic Curve 171External Circuit 123External Resistance 465, 467Extinguisher, Automatic Electric Fire 257Extra Current 162Extra-polar Region 454Eye, Electro-magnetic 248Eye, Selenium 478Facsimile Telegraph 510Factor, Armature 45Fahrenheit Scale 248Fall of Potential 430False Poles, Magnetic 350Farad 248Faraday, Effect 249Faraday's Cube 249Faraday's Dark Space 249, 489Faraday's Disc 249Faraday's Net 250Faraday's Ring 473Faraday's Transformer 250Faraday's Voltameter 250Faradic 250Faradic Battery 63Faradic Brush 251Faradic Current 162Faradic Excitability 246Faradization 251Faradization, Galvano- 265Far Leading Dynamo 198Fault of a Dynamo, Ironwork 308Faults 251Faults, Contact 147Feed Clockwork 128Feeder 251Feeder, Equalizer 251Feeder, Main or Standard 251Feeder, Negative 251Feeder, Neutral 251Feeder, Positive 251Feeder, Switch 500Feet, Ampere 30Ferranti Effect 251Ferric Chloride Battery 63Ferro-magnetic 252Fibre and Spring Suspension 252Fibre Suspension 252Field, Air 252Field, Alternating 252Field and Armature Reaction of Dynamo, 450Field, Controlling 148Field, Deflecting 178Field Density 252Field, Distortion of 252Field, Drag of 254Field, Intensity of a Magnetic 306Field Magnet 337Field of Force . 254Field of Force, Electro-magnetic 218Field of Force, Electrostatic 254Field of Force, Magnetic 344Field of Force of a Current 255Field of Force, Uniform 553Field, Pulsatory 256Field, Rotating 256Field, Stray 256, 495Field, Uniform 256Field, Uniform Magnetic 345Field, Waste 256Figure of Merit 256Figures, Haldat's 284Figures, Lichtenberg's 327Figures, Magnetic 345Filament 256Filament, Magnetic 345Filaments, Paper 402File, Circuit Breaker 121Finder, Position 427Finder, Range 447Finder, Wire 580Fire Alarm, Electric Automatic 257Fire and Heat Alarm 17Fire Extinguisher, Electric Automatic 257Fire Cleansing 257Fire, St. Elmo's 494Fishing Box 311Flashing in a Dynamo or Magneto-Electric Generator 257Flashing of Incandescent Lamp Carbons 257Flashing Over 258Flash, Side 484Flat Cable 96Flat Coil 133Flat Ring Armature 45Flats 258Flats in Commutator 140Flexible Cord 152Floating Battery, De la Rive's 179Floating Magnets, Meyer's 370Floor Matting, Electric 369Floor Push 258Fluid, Depolarizing 258Fluid, Electric 258Fluid, Electropoion 232Fluid, Insulator. 306Fluid, North Magnetic 357Fluids, Magnetic 345Fluid, South Magnetic 356Fluid Theory, Single 486Fluorescence 258Flush Boxes 258Fluviograph 259Flux, Magnetic 345Fly or Flyer, Electric 259Foci Magnetic 259Fog, Electric 259Following Horns 259Foot-candle 259Foot, Mil- 379Foot-pound 259Foot-step 259Force 259Force, Annular 544Force, Axial 544Force, Centrifugal 112Force, Coercive or Coercitive 131-471Force, Controlling 148Force, Counter-electro-motive 156Force de Cheval 260Force, Electro-magnetic 260Force, Electro-motive 227Force, Electro-motive, Transverse 549Force, Electrostatic 260Force, Field of 254Force, Field of, of a Current 255Force, Field of, Electrostatic 254Force, Kapp Line of 312Force, Lines of 330Force, Magnetic 346Force, Magnetic Field of 344Force, Magnetic Lines of 348Force, Magneto-motive 365Force, Motor Electro-motive 384Force of Polarization, Back Electro-motive 156Force, Oscillatory, Electro-motive 398Force, Photo-electro-motive 410Forces, Composition of 260Forces, Parallelogram of 260Forces, Resolution of 261Force, True Contact 549Force, Tubes of 261Force, Unit of 261Forked Circuits 126Fork, Tuning, Dynamo 202Forming 261Formula of Merit 256Foucault Current 163Foundation Ring 261Fourth State of Matter 261Frame 261Frame, Resistance 465Franklinic Current 163Franklin's Experiment 261Franklin's Plate 262Franklin's Theory 262-486Free Charge 115Free Magnetism 356Frequency 262Frequency, High 289Frictional Electricity 262Frictional Electric Machine 333Frictional Heating 262Friction Gear, Magnetic 276Friction, Magnetic 295-346Fringe 262Frog, Galvani's Experiment with 262Frog, Rheoscopic 262Frying 263Fulgurite 263Fuller's Battery 63Fulminating Pane 262Fundamental Unit 554Furnace, Electric 263Fuse Block 175Fuse Board 263Fuse Box 263Fuse, Cockburn 263Fuse, Electric 264Fuse Links 330Fuse, Safety 175-475Galvanic 264Galvanic Action, Volta's Law of 568Galvanic Dosage 190Galvanic Element 264Galvanic Excitability 247Galvanic or Voltaic Battery 76Galvanic or Voltaic Circle 119Galvanic or Voltaic Couple 156Galvanic Polarization 265Galvani's Experiment with Frog 262Galvanism 265Galvanization 265Galvanization, Labile 265Galvanized Iron 265Galvano-cautery 109Galvano-cautery, Chemical 265Galvano-electric Cautery 109Galvano-faradization 265Galvanometer 265Galvanometer, Absolute 266Galvanometer, Aperiodic 266Galvanometer, Astatic 266Galvanometer, Ballistic 267Galvanometer Constant 268Galvanometer, Differential 268Galvanometer, Direct Reading 269Galvanometer, Marine 269Galvanometer, Mirror 271Galvanometer, Potential 269Galvanometer, Proportional 269Galvanometer, Quantity 269Galvanometer, Reflecting 270Galvanometer, Shunt 271-483Galvanometer, Sine 271Galvanometer, Tangent 272Galvanometer, Torsion 273-544Galvanometer, Upright 274Galvanometer, Vertical 274Galvanometer, Volt and Ampere Meter 274Galvano-plastics 275Galvano-puncture 232-275Galvanoscope 275Galvano-thermal Cautery 100Gap, Spark 490Gas Battery 63Gas Battery, Grove's 281Gas Burner, Electric 93Gas, Carbonic Acid 108Gas, Electrolytic 275Gases, Magnetism of 357Gases, Mixed 275Gas Jet, Carcel 108Gas, Olefiant 397Gassing 275Gassiot s Cascade 275Gastroscope 275Gas Voltameter 564Gauge, Battery 64Gauge, Electrometer 226Gauss 275Gauss' Principle 276Gauss, Tangent Positions of 276Gauze Brush, Wire 92Gear, Magnetic 346Gear, Magnetic Friction 276Geissler Pump 437Geissler Tubes 276Generating Plate 277Generator, Current 277Generator Inductor 199Generator, Magneto-electric 362Generator, Magneto-electric, Flashing in a Dynamo or 257Generator, Motor 384Generator, Pyromagnetic. 442Generators and Motors, Commutator of Current 140Generator, Secondary 277-477Geographic Meridian 372German Mile Unit of Resistance 466German Silver 277German Standard Candle 99Gilding, Electro- 277Gilding Metal 277Gimbals 278Girder Armature 49Glass 278Globe or Globular Lightning 330Glow Discharge 187Gold 278Gold Bath 279Gold Leaf Electroscope 233Gold Stripping Bath 279Governor, Centrifugal 113Governor, Rate 449Graduator 279Gram 280Gram-atom 280Gram-molecule 280Graphite 280Gravitation 280Gravity, Acceleration of 280Gravity Ammeter 27Gravity Battery 64Gravity, Centre of 112Gravity Control 281Gravity Drop Annunciator 35Grease Spot 92Green Vitriol 562Grenet Battery 65Grid 281Grid Plug 420Grip, Cable 96Gross Efficiency 205Ground 281Grounded Circuit 123Ground Plate 417Ground Wire 281Grove's Battery 65Grove's Gas Battery 281Guard Ring 282Guard Tube 282Gun, Electro-magnetic 282Gutta Percha 282Gyration, Centre of 112Gyrostatic Action of Armatures 283H 283H Armature 49Haarlem Magnet 337Hair, Removal of, by Electrolysis 283Haldat's Figures 284Hall Effect 284Hall Effect, Real 284Hall Effect, Spurious 284Halleyan Lines 308Hall's Experiment 284Halske's and Siemens' Battery 72Hand Hole 190Hanger Board 284Hanger, Cable 96Hanger, Cable, Tongs 97Harcourt's Pentane Standard 406Hare's Deflagrator 73Harmonic 23Harmonic Curve 174, 485Harmonic Motion, Simple 486Harmonic Receiver 284, 451Head Bath, Electric 284Head-light, Electric 285Head, Torsion 544Heat 285Heat and Fire Alarm 17Heat, Atomic 52, 285Heat, Electric 285Heat, Electric, Convection of 149, 286Heat, Irreversible. 286Heat, Mechanical Equivalent of 286Heat, Molecular 286Heat, Specific 286Heat, Specific, of Electricity 288Heat Units 288Heater, Electric 286Heating, Admiralty Rules of 12Heating Error 286Heating, Frictional 262Heating Magnet 286Heavy Carburetted Hydrogen, 397Hecto 288Hedgehog Transformer 548Heliograph 288Helix 288Henley's Universal Discharger 189Henry 288Henry's Coils 138Hermetically Sealed 289Hertz's Experiments 470Heterostatic Method 280Hexode Working 581High Bars of Commutator 289High Frequency 289High Vacuum 557Hinged Armature 45Hinged Electro-magnet 217Hissing 289Hittorf's Resistance 466Hittorf's Solution 289Hoffer's Method of Magnetization 360Hole Armature 45Hole, Hand 190Holders 289Holder, Brush 91Holder, Candle 99Holders, Carbon 107Holophote Lamp 321Holtz's Influence Machine 334Home Station 493Hood 290Horizontal Induction 302Horns 290Horns, Driving 132Horns, Following 259Horns, Leading 324Horns, Trailing 259Horse Power 290Horse Power, Actual 290Horse Power Curve 171Horse Power, Electric 290Horse Power Hour 290Horse Power, Indicated 290Horseshoe Magnet 337Hour, Ampere- 30Hour, Horse Power 290H. P. 290Hughes' Electro-magnet 291Hughes' Induction Balance 291Hughes' Sonometer 488Hughes' Telegraph 511Hughes' Theory of Magnetism 357Hughes' Type Printer 511Human Body, Resistance of 467Hydrochloric Acid Battery 66Hydro-electric 293Hydro-electric Machine 293Hydrogen 294Hydrogen, Carburetted, Heavy 397Hydrometer, Beaumé 78Hygrometer 294Hyperbolic Logarithms 389Hysteresis 295Hysteresis, Magnetic 294Hysteresis, Static 295Hysteresis, Viscous 295, 356Idioelectrics 295Idiostatic Method 295Idle Coils 295Idle Poles 296Idle Wire 291Igniter 296I. H P. 296Illuminating Power 296Illuminating Power, Spherical 296Illuminating Power, Standard of, Viole's 561Illumination, Unit of 296Image, Electric 296Imbricated Conductor 146Immersion, Simple 185Impedance 297, 462Impedance, Impulsive 297Impedance, Oscillatory 297Impressed Electro-motive Force 297Impulse 297Impulsive Discharge 188Impulsive Impedance 297In-and-out, Soaking 486Incandescence, Electric 297Incandescent Lamp 321Incandescent Lamp Carbons, Flashing of 257Incandescent Lamp, Chamber of 113Incandescent Lamp, Life of 327Incandescent Lamp, Three Filament 322Inclination Compass 142Inclination, Magnetic 346Inclination Map 297Inclination or Dip, Angle of 33Incomplete Circuit 125Increment Key 314Independence of Currents in Parallel Circuits 297India Rubber 102Indicated Horse Power 290Indicating Bell 80, 297Indicator 298Indicator, Circuit 298Indicator, Throw-back 540Indicator, Volt 568Indifferent Electrode 210Indifferent Point 421Induced Current 163Induced Magnetization, Coefficient of 354, 359Inductance 298Inductance Balance 293Inductance Bridge 293Induction, Anti-, Conductor 36Induction, Back 55Induction Balance, Hughes 291Induction, Coefficient of Magnetic 349Induction, Coefficient of Mutual 301Induction, Coefficient of Self- 298Induction Coil 133Induction Coil, Inverted 136Induction Coil, Telephone 137, 526Induction, Cross 298Induction Current 163Induction, Electro-magnetic 218, 299Induction, Electrostatic 302Induction, Electrostatic, Coefficient of 234Induction, Horizontal 302Induction, Lateral 302Induction, Lines of 330Induction, Magnetic 302, 346Induction, Magnetic, Apparent Coefficient of 346Induction, Magnetic, Coefficient of 346Induction, Magnetic Dynamic 347Induction, Magnetic, Self- 352Induction, Magnetic Static 347Induction, Magnetic, Tube of 347Induction, Mutual, Electro-magnetic 302Induction, Mutual, Electrostatic 303Induction, Open Circuit 303Induction, Oscillatory 398Induction Protector, Mutual 481Induction, Self- 303Induction Sheath 303Induction. Unipolar 304Induction, Unit of Self- 304Induction, Vertical 304Inductive Capacity, Magnetic 346, 349Inductive Effect, Counter- 204Inductive Resistance 466Inductophone 304Inductor 305Inductor Dynamo 199Inductor Generator 199Inductor, Magneto- 363Inductor, Pacinotti's 400Inductorium 138Inertia 305Inertia, Electro-magnetic 305Inertia, Magnetic 347Infinity Plug 305, 420Influence, Electric 305Influence Machine 334Influence Machine, Armature of 46Influence Machine, Holtz 334Influence, Magnetic 346Installation 305Instantaneous Capacity 102Insulating Stool 305Insulating Tape 305Insulating Varnish 306Insulation, Electric 305Insulation, Magnetic 347Insulation, Oil 396Insulation Resistance 466Insulator 306Insulator Caps 306Insulator, Fluid 306Insulator, Line or Telegraph 306Intensity 306Intensity Armature 45Intensity Current 163Intensity, Electro-motive 228Intensity, Magnetic 348Intensity of a Magnetic Field 306Intensity of Magnetization 360Intensity, Poles of 426Inter-air Space 489Intercrossing 307Interference, Armature 45Interferric Space 489Interior Pole Dynamo 191Interlocking- Electro-magnets. 229Intermediate Metals, Law of 323Intermittent, 307Internal Characteristic 114Internal Resistance 466lnterpolar Conductor 307Interpolar Region 307Interpolation 307Interrupter, Electro-magnetic, for Tuning Fork 307Intrinsic Efficiency 205Invariable Calibration 97Inverse Induced Current 163Inverse Squares, Law of 323Inversion, Thermo-electric 533Ions 307Iron 308Ironclad Dynamo 200Ironclad Electro-magnet, 219Ironclad Magnet 356Iron Disc Ammeter, Eccentric 27Iron, Electrolytic 308Iron, Galvanized 265Ironwork Fault of a Dynamo 308Irreversible Heat 286Isochasmen Curve 171Isochronism 308Isoclinic Lines 308Isoclinic Map 308Isodynamic Lines 308Isodynamic Map 308Isoelectric Points 422Isogonal Lines 308Isogonic Map 309Isolated Distribution 309Isolated Plant 309Isolated Supply 309Isotropic 309Isthmus Method of Magnetization 360I. W. G., 309J 309Jablochkoff Candle 160Jack. Spring- 492Jacketed Magnet 356Jacobi's Law 309Jacobi's Method of Magnetization 360Jacobi's Unit of Current 163Jacobi's Unit of Resistance 466Jamin Candle 100Jar, Leyden 325Jar, Lightning 330Jar, Luminous 332Jars, Leyden, Charging and Discharging 108Jar, Unit 554Jewelry 309Joulad 311Joule 311Joule Effect 311Joule's Electro-magnet 337Joule's Equivalent, 311Joint, American Twist 309Joint, Britannia 309Joint, Butt 310Joint Current 160Joint, Lap 310Joint, Marriage 310Joint, Resistance 464Joints in Belts 311Joint, Sleeve 310Joint, Splayed 311Junction Box 311Junction, Thermo-electric 533K. 311Kaolin 311Kapp. Line of Force 312Kathelectrotonus 312Kathode 312Kathodic Closure Contraction 312Kathodic Duration Contraction 312K. C. C. 312K. D. C. 312Kempe's Discharge Key 315Keeper 312Kerr Effect 235, 312Kerr's Experiment 312Key 313Key Board 313Key, Bridge 313Key, Double Contact 314Key, Double Tapper 314Key, Charge and Discharge 313Key, Increment 314Key, Kempe's Discharge 315Key, Magneto-electric 315Key, Make and Break 316Key, Plug 316Key, Reversing 316Key, Sliding-contact 316Key, Telegraph 316Kicking Coil 132Kilo 316Kilodyne 316Kilogram 317Kilojoule 317Kilometer 317Kilowatt 317Kine 317Kinnersley's Thermometer 536Kinetics, Electro- 211Kinetic Energy 241Kirchoff's Laws 317Knife Break Switch 501Knife Edge Suspension 317Knife Edge Switch 501Knife Switch 501Knot 317Kohlrausch's Law 317Kookogey's Solution 318Krizik's Cores 318L 318Lag, Angle of 33, 318Lag, Electric 332Lag, Magnetic 348Lalande & Chaperon Battery 69Lalande-Edison Battery 69Lamellar Distribution of Magnetism 357Laminated 318Laminated Core 154Laminated Core, Tangentially 155Lamination 318Lamination of Armature Conductors 319Lamination of Magnet 361Lamp, Arc 319Lamp, Arc, Double Carbon 191Lamp Carbons, Flashing of Incandescent 257Lamp, Carcel 108Lamp, Contact 320Lamp, Differential Arc 320Lamp Globe, Waterproof 572Lamp, Holophote 321Lamp-hour 321Lamp, Incandescent 321Lamp, Incandescent, Chamber of 113Lamp, Incandescent, Three Filament 322Lamp, Life of Incandescent 327Lamp, Lighthouse 322Lamp, Monophote 321Lamp, Pilot 323Lamp, Polyphote 323Lamp, Semi-Incandescent 323Lamp-socket 323Lamps, Bank of 323Lane's Electrometer 226Langdon Davies' Rate Governor or Phonophone 450Lenz's Law 325Lap Joint 310Lap Winding 570Latent Electricity 323Lateral Discharge 188Lateral Induction 302Latitude, Magnetic 348Law, Jacobi's 309Law, Kohlrausch's 317Law, Lenz's 325Law of Angular Currents 165Law of Electrolysis 213Law of Intermediate Metals 323Law of Inverse Squares 323Law of Magnetic Attraction and Repulsion. Coulomb's 338Law of Successive Temperatures 324Law, Magnus' 367Law, Ohm's 396Law, Pflüger's. 409Law, Right Handed Screw 324Law, Sine 486Laws, Kirchoff's 317Laws of Thermo-electricity, Becquerel's 78Law, Tangent 502Law, Voltametric 567Lead 324Lead, Angle of 33Lead Chloride Battery 66Lead of Brushes 90Lead of Brushes, Negative 324Lead, Peroxide of, Battery 69Lead Sulphate Battery 66Lead Tee 504Leading Horns 324Leading-in Wires 324Leak 324Leakage 324Leakage Conductor 325Leakage, Electro-magnetic 219Leakage, Magnetic. 348Leakage, Surface 498Leclanché Agglomerate Battery 66Leclanché Battery 66Leg of Circuit 325Legal Ohm 395Legal Quadrant 444Legal Volt 568Length of Spark 490Letter Boxes, Electric 325Leyden Jar 325Leyden Jar, Armature of 46Leyden Jars, Battery of 68Leyden Jars, Charging and Discharging 108Leyden Jars, Sir William Thomson's 326Lichtenberg's Figures 327Life Curve 171Life of Incandescent Lamp 327Light, Electro-magnetic, Theory of 219Light, Maxwell's Theory of 369Lighthouse Lamp 322Lightning 327Lightning Arrester 328Lightning Arrester, Counter-electro-motive Force 329Lightning Arrester Plates 329Lightning Arrester, Vacuum 329Lightning, Ascending 330Lightning, Globe or Globular 330Lightning Jar 330Lightning, Back Stroke or Shock of 55Lime, Chloride of, Battery 61Limit, Magnetic 348Limit of Magnetization 361Linear Current 164Lineman's Detector 180Line of Commutator, Neutral 300Line of Contact 330Line of Force, Kapp 312Line of Magnet, Neutral 361Line or Telegraph Insulator 306Lines, Halleyan 308Lines, Isoclinic 308Lines, Isodynamic 308Lines, Isogonal 308Lines, Isogonic 308Lines of Force 330Lines of Force, Cutting of 175Lines of Force, Electro-magnetic 219Lines of Force, Electrostatic 234Lines of Force, Magnetic 348Lines of Induction 330Lines of Slope 330Lines or Points of Least Sparking 490Lines, Trunk 550Links, Fuse 330Liquids, Electro-dynamic Rotation of 474Liquids, Electro-magnetic Rotation of 475Liquor, Spent 491Listening Cam 330Lithanode 331Load 331Load Curve 172Load of Armature 46Local Action 331Local Battery 331Local Circuit 331Local Currents 163, 331Localization 331Locus 331Lodestone 332Logarithm 332Logarithms, Hyperbolic 389Logarithms, Napierian 389Local Battery 66Long Coil Magnet 361Long Range Electro-magnet 220Long Shunt and Series Winding 579Long Shunt Winding 579Loop 332Loop Break 332Loop, Circuit 125Loop, Drip 192Lost Amperes 30Lost Volts 571Low Vacuum 557Luces 332Luminous Jar 332Luminous Pane 401Luminous Tube 550Lux 332M 332Machine, Cylinder Electric 333Machine, Electric, Wimshurst 577Machine, Frictional Electric 333Machine, Holtz Influence 334Machine, Hydro-electric 293Machine, Influence 334Machine, Nairne's Electrical 389Machine, Plate Electrical 417Machine, Rheostatic 472Machine, Toeppler-Holtz 334Machine, Wimshurst 335Mack 335Magic Circle 119Magne-crystallic Action 335Magnet 335Magnet, Anomalous 335Magnet, Artificial 335Magnet, Axial 336Magnet, Bar 336Magnet, Bell Shaped 336Magnet Coils, Sheath for 481Magnet, Compensating 336Magnet, Compound 336Magnet, Controlling 185, 336Magnet, Damping 336Magnet, Deflection of 337Magnet, Directing 185Magnet, Electro- 215, 337Magnet, Equator of 337Magnet, Field 337Magnet, Haarlem 337Magnet, Heating 286Magnet, Horseshoe 337Magnet, Ironclad 356Magnet, Joule's Electro- 337Magnet-keeper 361Magnet, Lamination of 361Magnet, Long Coil 361Magnet, Natural 361Magnet, Neutral Line of 361Magnet, Normal 361Magnet Operation 365Magnet, Permanent 365Magnet Pole 365Magnet, Portative Power of 366Magnet, Projecting Power of a 435Magnet, Relay 457Magnet, Simple 366Magnet, Solenoidal 366Magnet, Sucking 366Magnet, Unipolar 366Magnet Coil 336Magnet Core 336Magnet Poles, Secondary 366Magnet Pole, Unit 366Magnetic Adherence 338Magnetic and Electro-magnetic Equipotential Surface 244Magnetic Attraction 338Magnetic Attraction and Repulsion, Coulomb's Law of 338Magnetic Axis 338Magnetic Azimuth 338Magnetic Battery 338Magnetic Bridge 338Magnetic Circuit 340Magnetic Circuit, Curve of Saturation of 174Magnetic Concentration of Ores 340Magnetic Concentrator 340Magnetic Continuity 340Magnetic Conductance and Conductivity 340Magnetic Control 341Magnetic Couple 341Magnetic Creeping 341Magnetic Curves 341Magnetic Cut Out 175Magnetic Declination 342Magnetic Density 342Magnetic Dip 342, 346Magnetic Discontinuity 342Magnetic Double Circuit 340Magnetic Eye, Electro- 248Magnetic Elements 342Magnetic Elongation 344Magnetic Equator 344Magnetic False Poles 350Magnetic, Ferro- 252Magnetic Field, Intensity of a 306Magnetic Field of Force 344Magnetic Field, Uniform 345Magnetic Figures 345Magnetic Filament 345Magnetic Fluid, North 357Magnetic Fluids 345Magnetic Flux 345Magnetic Force 346Magnetic Friction 295, 346Magnetic Friction Gear 276Magnetic Fluid, South 356Magnetic Foci 259Magnetic Gear 346Magnetic Hysteresis 294Magnetic Inclination 346Magnetic Induction 302Magnetic Induction, Apparent Coefficient of 346Magnetic Induction, Coefficient of 346-349Magnetic Induction, Dynamic 347Magnetic Induction, Static 347Magnetic Induction, Tube of 347Magnetic Inductive Capacity 349Magnetic Inertia 347Magnetic Influence 346Magnetic Insulation 347