Thermal Electric Meter 375Thermal Equivalent, Electro- 245Thermal Energy 242Thermic Balance 85Thermo Call 530Thermo-chemical Battery 530Thermo-chemical Equivalent 245Thermo-electric Battery or Pile 530Thermo-electric Call 531Thermo-electric Couple 532Thermo-electric Current 167Thermo-electric Diagram 532Thermo-electric Element 237Thermo-electric Inversion 533Thermo-electric Junction 533Thermo-electric Neutral Point 390Thermo-electric Pile, Differential 533Thermo-electric Power 533Thermo-electric Reversal 533Thermo-electric Series 534Thermo-electric Telephone 527Thermo-electric Thermometer 535Thermo-electricity 533Thermo-electricity, Laws of, Becquerel's 78Thermo-electricity, Volta's Law of 568Thermo-electrometer 536Thermolysis 535Thermo-multiplier 536Thermometer 535Thermometer, Electric 535Thermometer, Kinnersley's 536Thermometer, Tele- 527Thermometer, Thermo-electric 535Thermophone 537Thermostat, Electric 537Third Brush 91Thomson Effect 538Thomson's Replenisher, Sir William 459Thomson's Battery, Sir William 72Thomson's Unit of Resistance 468Three Filament Incandescent Lamp 322Three Way Switch 501Three Wire System 539Throw 237, 540Throw-back Indicator 540Thrust Bearings 540Thunder 540Ticker 540Tick, Magnetic 354Timbre 444Time Constant 541Time Cut-outs 541Time Electric Meter 375Time-fall 541Time-reaction 541Time-rise 541Tin 541Tin Sounders 542Tinnitus, Telephone 542Tips, Polar 423Tips, Pole 290, 426Tissandier's Solution 542Toeppler-Holtz Machine 334Tongs, Cable Hanger 97Tongs, Discharging 189Tongue of Polarized Relay 542Tongue of Polarized Relay, Bias of 542Toothed Core-discs 154Top, Magnetic 542Torpedo, Electric 543Torpedo, Sims-Edison 543Torque 543Torque, Curve of 174Torricellian Vacuum 557Torsion Balance, Coulomb's 544Torsion Galvanometer 273, 544Torsion Head 544Torsion Suspension 545Total Earth 203Touch 545Touch, Separate 479Tourmaline 545Tower, Electric 545Tower System 545Trailing Horns 259Transformer 545Transformer, Commuting 547Transformer, Continuous Alternating 547Transformer, Continuous Current 384, 547Transformer, Core 547Transformer, Faraday's 250Transformer, Hedgehog 548Transformer, Multiple 548Transformer, Oil 548Transformer, Pilot 415Transformer, Series 548Transformer. Sheath for 481Transforming Station 494Transformer, Welding 548, 575Translator 519Translucent Disc Photometer 412Transmitter 548Transmitter, Carbon 549Transmission of Energy, Electric 240Transposing 549Transverse Electro-motive Force 549Trap, Bug 92Traveling Pole 426Trembling Bell 78Trolley 549Trolley, Double 549Trolley Section 549Trough Battery 73Trouvé's Blotting Paper Battery 73Trouvé's Solution 549True Contact Force 549True Ohm 396True Resistance 467Trimmer, Brush 549Trumpet, Electric 550Trunk Lines 550Trunking Switch Board 550Tube, Electric 550Tube, Guard 282Tube, Luminous 550Tube of Magnetic Induction 347Tube, Spark 491Tube, Stratification 495Tubes, Geissler 276Tubes of Force 261Tubes, Plücker 420Tubular Braid 550Tubular Core 155Tubular Magnet 356Tuning Fork Circuit Breaker 121Tuning Fork Dynamo 202Tuning Fork, Interrupter for 307Turning Moment 544Turns 550Turns, Ampere- 31Turns, Dead, of a Dynamo 551Turns, Primary Ampere- 551Turns, Secondary Ampere- 551Twist Joint, American 309Twist, Magnetic 354Tyer's Battery 74Typewriter, Electric 551Type Printer, Hughes' 511Ultra-gaseous Matter 551Unbuilding 552Underground Conductor 552Underground Electric Subway 552Undulatory 23Undulatory Current 167Unidirectional 553Uniform Field 256Uniform Field of Force 553Uniform Magnetic Field 345Unipolar 553Unipolar Armature 50, 553Unipolar Current Induction 553Unipolar Dynamo 202-553Unipolar Electric Bath 57Unipolar Induction 304Unipolar Magnet 366Unit 553Unit, Absolute 554Unit Angle 554Unit. B. A. 554Unit, B. A., of Resistance 462Unit Current 167Unit Electro-motive Force 228Unit, Fundamental 554Unit Jar 554Unit Magnet Pole 366Unit of Capacity 105Unit of Conductivity 145Unit of Electric Potential 432Unit of Energy, Electro-magnetic 220Unit of Force 261Unit of Illumination 296Unit of Output 399Unit of Reluctance 458Unit of Resistance, B. A. 78Unit of Resistance, Breguet 463Unit of Resistance, Digney 464U nit of Resistance, English Absolute or Foot-second 465Unit of Resistance, German Mile 466Unit of Resistance, Jacobi's 466Unit of Resistance, Meter-millimeter. 466Unit of Resistance, Mil-foot 467Unit of Resistance, Siemens' 467Unit of Resistance, Swiss 468Unit of Resistance, Thomson's 468Unit of Resistance, Varley's 468Unit of Self-induction 304Unit of Supply 554Unit of Work 581Unit Resistance 468Units, Circular 126, 555Units, Derived 555Units, Heat 288Units, Practical 555Universal Battery System 556Universal Discharger 189Unmarked End 556Upright Galvanometer 274Upward's Battery 75V 556V. A. 557Vacuum 557Vacuum, Absolute 557Vacuum, High 557Vacuum Lightning Arrester 329Vacuum, Low 557Vacuum, Partial 557Vacuum, Torricellian 557Valency 557Valve, Electrically Controlled 558Vapor Globe 558Variable Conductivity 145Variable Period 558Variable State 558Variation of the Compass 32, 558Variations, Magnetic 354Variometer 559Varley's Battery 76Varley's Condenser 559Varley's Resistance 559Varley's Unit of Resistance 468Varnish 559Varnish, Electric 559Varnish, Insulating 306Varnish, Red 559Varnish, Shellac 481Vat 559Velocity 559Velocity, Angular 32, 559Velocity of Signaling 560Velocity Ratio 560Ventilation of Armature 560Vertical Galvanometer 274Vertical Induction 304Verticity, Poles of 426, 560Vibrating Bell 78Vibration Period 560Vibration, Sympathetic 501, 561Vibrator, Electro-magnetic 561Villari's Critical Value 561Viole 562Viole's Standard of Illuminating Power 561Virtual Resistance 297Viscous Hysteresis 295, 356Vis Viva 562Vitreous Electricity 562Vitriol, Blue 562Vitriol, Green 562Vitriol, White 562Volatilization of Carbon 108Volt 562Volt-ampere 573Volt and Ampere Meter Galvanometer 274Volt, B. A. 568Volt, Congress 568Volt, Coulomb 568, 573Volt Indicator 568Volt. Legal 568Voltage 562Voltage, Spurious 493Voltage, Terminal 562Voltaic 563Voltaic Alternatives 563Voltaic Arc 39Voltaic Cell, Daniell's Standard 109Voltaic Cell, Double Fluid 191Voltaic Cell, Capacity of Polarization of a 103Voltaic Cell, Single Fluid 486Voltaic Cell, Standard 109Voltaic Cell, Standard, Latimer Clark's 110Voltaic Circuit 126Voltaic Effect 563Voltaic Electricity 563Voltaic Element 237Voltaic or Galvanic Battery 76Voltaic or Galvanic Circle 119Voltaic or Galvanic Couple 156Voltameter 563Voltameter, Copper 563Voltameter, Differential, Siemens' 564Voltameter, Faraday's 250Voltameter, Gas 564Voltameter, Silver 565Voltameter, Sulphuric Acid 564Voltameter, Volume 564Voltameter, Weight 566Voltametric Law 567Volta's Battery 76Volta's Fundamental Experiments 567Volta's Law of Galvanic Action 568Volta's Law of Thermo-electricity 568Voltmeter 568Voltmeter, Battery 569Voltmeter, Cardew 569Voltmeter, Electrostatic 571Voltmeter, Reducteur for 453Volts, Lost 571Volume Voltameter 564Vulcanite 571W 572Wall Bracket 572Wall Socket 572Ward 572Waste Field 256Water 572Water Battery 77Water Equivalent 572Water Level Alarm 18Waterproof Lamp Globe 572Wattless Current 168Watt 572Watt-hour 573Watt Meter 375Watt-minute 573Watt-second 573Watts, Apparent 573Wave Winding 580Waves, Amplitude of 31Waves. Electro-magnetic 573Wax, Paraffine 402Weber 574Weber s Absolute Unit Resistance 468Weber-meter 574Weber's Theory of Magnetism 358Wedge Cut-out 175Wedge. Double 191Weight, Atomic 53Weight, Breaking 89Weight Electrometer 223Weight Voltameter 566Welding, Electric 574Welding Transformer 548, 575Wheatstone's A. B. C. Telegraph 521Wheatstone's Balance 577Wheatstone's Bridge 575Wheatstone's Bridge, Commercial 86Wheatstone's Rheostat 472Wheel, Phonic 409Wheel, Reaction 259Whirl, Electric 577White Vitriol 562Wilde Candle 101Wimshurst Electric Machine 335, 577Wimshurst Machine 335, 577Wind, Electric 578Windage 578Windings, Ampere 31Winding, Bifilar 81Winding, Compound 578Winding, Disc 579Winding, Lap 579Winding, Long Shunt 579Winding, Long Shunt and Series 579Winding, Multiple 579Winding, Multipolar 579Winding, Series 579Winding, Series and Separate Coil 579Winding, Series and Short Shunt 580Winding, Short Shunt 579Winding, Shunt 483, 580Winding Shuttle 580Winding, Wave 580Winding Working, Differential 183Wire, Block 83Wire, Bus 94Wire, Dead 177Wire Finder 580Wire Gauze Brush 92Wire, Idle 296Wire, Neutral 390Wire, Omnibus 94Wire, Square 493Wire System, Three 539Wires, Crossing 158Wires, Leading-in 324Wires, Phantom 409Wires, Pilot 415Wollaston Battery 78Work 580Work, Electric, Unit of 580Work, Unit of 581Working, Contraplex 580Working, Diode 580Working, Diplex 580Working, Double Curb 581Working, Hexode 581Working, Pentode 581Working, Reverse Current 581Working, Single Curb 581Working Tetrode 581Writing Telegraph 521X, Axis of 54Y, Axis of 54, 397Yoke 581Zamboni's Dry Pile 581Zero 581Zero, Absolute 581Zero Potential 432, 582Zero, Thermometric 582Zinc 582Zinc Sender 582Zincode 582Zone, Peripolar 582Zone, Polar 582