None
668 INDEX hoW'Enttgj or Low-Current Lamps, 183 Low Five Risks ol InouHtescent Elec- tric Launps, 350 Low Pressure Electric Power Traii»> missicn, 518 Low Pressure Electric Power Transnu** sion STStcflUt si9 Low Temperature of Vscuum-Tube Ra^ diations. Cause of. 381 Low-VoltM High-OuuUe-Power Incanh descent Xamps, 303 Lubricant, Use of, on Commutator, $> Luminoua Emisaivity of Incandescing Filament, Effect of Temperature on, 278 Luminous lutenaity of Source, lap liUminoua lutenaity. Standards of. 140 Luminous Source, Candle- Power of, 1^9 Luminoua SourcM, Ordinary Eictremmy Low Luminous Efficiency of, 276 Lnndell Slow -Speed Sntipolar Elec- tric Motor, 441 Machini, Dynamo • Electric, Armature, of, 6 Machine, Dynamo • Electric, Constant- Current, II Machine, Dynamo - Electric, Constant- Potential. 11 Machine, Dynamo • Electric, Definition Machinery, Direct Motor>DriTcn, Sapid Extension of, 421 Mnchine^]^ Economy of Separate Mo- tor-Drive of, 435 Machinea, Dynamo • Electric, Belt-Driv(> Machines, Dynamo-Electric, Direct-Con- nected, 7 Machines. Magneto-Electric, 11 Madison Square Tower, New York Ci^, Electric Illumination of, 315 MMnet, Approach of, Ejctinction ol Carbon Voltaic Arc by, 122 Magnet Cores, Lsmination of, 29 Magnetic Blow-Out, Elihu Thomson's, 133 Magnetic Blow-Out for Car Controller, * 474 Magnetic Flux of Dynamo, Effect of, on Value of E.M.F. of Annature, 9 Magnetic Force, Effect of Variatiotts of, on Speed of Rotation of Electric Motor, 416 Magnetic Hysteresis, 37 Magneto-Electric Generator, 68 Magneto - Electric Generator, Alliance, 156 Magneto - Electric Generator, Clarice's, 69 Magneto - Electric Machine, Gramme T^rpe, 24 Magneto- Electric Machine, Hand-Driv- en, 34 Magneto-Electric Machines, 11 Mam, Negative, of Three-Wire System of Incandescent Electric Lamp Dis- tribution, 326 Main, Neutral, of Three-Wire System of Incandesoent Electric Laasp Dis- tribution, 326 Main, Positive, of Three-Wire Sniem of Incandesoent Electric Lmi^* Disbi- bution, 326 Maintenance of Carbon Arc, Conditions Necessary for, 153 Manhattan Enclosed Arc Lamp, 182 Manufacture of Incandescent Electric I^mp^ 282, 297 Manufacture of Incandescent Lamps, United Statea Census Report Con- cerning, 282 Mast- Arm Support for Arc TAmpa, 213 Maximum Candle-Power, 149 Maximum Load of Central Station, Pro- viding for, 358 Mean Hemispherical Candle-Power, 149 Mean Horizontal Candle-Power, 148 Mean Spherical Candk-Power, 148 Mednnical and Electric Units oTWork and Activity, Relationa between, 10 Mechanical Cut-Out Switch for Are Lamps, 2x4 Mechanical Pump for Incandescent Lamp Bulbs, 295 Mechanism of Kohn's MultiOrbon In- candescent Lamp, 262 Menlo Park, Edison's Electric Railroad at, 463 Mercury Pump, Sprengd, 297 Metal, Babbitt, 39 Metallic and Carbon Gollectins Brushes for Dynamos^ 40 Metallic Voltaic Arc8» Pfccidiar Color of, X2X Meters, Ampere Hour, 356 Meters, Electric, 356 Meters. Watt-Hour, 3^ Methoa of Fusing Xamp Mount to Lamp Bulb, 2^1 Method of Varying Connection of Field Coils of Motor for Varying Speed of, 4»? Metropolitan Street Railway System of New York City, M^ of, 531 Metropolitan Street Railway Sirstem of New York City, Triphase Distribution of Current of, 531 Metropolitan Street Railway System of New York City, Triphase Generators of, 532 Microscope, Incandescent Electric Lamp for, 340 Miners Incandescent Electric Lamps, ^38 Mmiature Incandescing Electric Lamp, Wollteton's, 247 Modified Form of Faraday's Early Eke- trie Motor, 393 Molded Carbons, 191 Molded Globes for Arc Tjimp5>, ai8 Molded Incandescent Lamp Globes, 290 Momentary Artificial Ulumination Pro- duced by Leyden-Jar Battery Dis- charges, 1x5 Moore's System of Vacuum-Tube Elec- tric Lighting. "Electrical Worid and Engineer's" Description of, 384, 386 Moore's Use of Altematxng • Current Mains for Vacuum-Tube Lighting, 384 Moore's Vacuum Break, 38a I INDEX 557 Moore's Vacuum Rotator for Vacuum- Tube Lighting, 38^ Morris, Weare^ and Monckton's Vacuum- Tube Electric Lamp, 257 Morris, Weare, and Monckton's Vacuum- Tube Lamp, Quotation from Specifi- cation of, 258 Motor and Dynamo, Discovery of Re- versibility of, 406 Motor, Barlow's Star-Wheel Electric, ^4 Motor, Bipolar, for Continuous or Di- rect Electric Currents, 41^ Motor, Compound-Wound Electric, 420 Motor, Compound-Wound Electric, Dia- gram Showing Connections of, 420 Motor, Compound- Wound Electric, Self- Governing Power of, 420 Motor Converter, 527 Motor, Crocker-Wheeler Slow-Speed Bi- polar Electric, 432 Motor, Crocker-Wheeler Slow-Speed Bi- polar Electric, Armature of, 433 Motor, Dal Negro's Early Electric, 396 Motor, Davenport's Electric, 399 Motor, Davidson's Electric, 400 Motor-Driven Bellows for Church Or- gans, Advantages of, 438 Motor-Driven Punching TooL a^i Motor - Driven Stamping Machines at Mint at Philedelphia, 442 Motor-Driven Tools, 444 Motor, Dvnamo, 527 Motor, Electric, Belt Tightener for, 432 Motor, Electric, Conditions for Reverral of Rotation of, 390 Motor, Electric, Counter E.M.F. of, 415 Motor, Electric, Self-Oiling and Self- Aligninff Bearings for, 434 Motor, Enas's Electric, 400 Motor, Farada]r's Early Electric, 389 Motor, Froment's Electric, 40 x Motor-Generator, 527 Motor, Green's Early Electric, 461 Motor, Horns of, 35 Motor Installation, Electric, in the United States Mint at Philadelphia, 44a Motor, Jacobi's Electric, 396 Motor, Lundell Slow-speed Sextipolar Electric, 441 Motor, Method of Varirins Speed of, by Varying Connection of Field Coils of, 427 , Motor. Modified Form of Faraday's Early Electric, 393 Motor, Multiphase Induction, Some Pe- culiarities of, K13 Motor, Pacinotti^ Electric, 405 Motor, Page's Electric, 40^ Motor, Ritchie's Electro-Magnetic, 309 Motor, Series- Wound, Diagram Showing Connections of, 419 Motor, Series-Wound Electric, 410 Motor, Shunt-Wound Electric, Diagram Showing Connections of, 418 Motor, Shunt -Wound Electric, Self- Goveming Power of, 418 Motor, Shunt-Wound, Methods of Start- ing, 436 Motor Speed and Armature Resistance, 415 Motor, Sturgeon's Early Electric, 395 Motor Transformer, 527 Motors, Continuous - Current, Efficiency of. 431 Motors, Early Electric, Cause of Failure of, 462 Motors, Early Electric, Reasons for Com- mercial Failure of, 406 Motors, Electric, Advantages of, 421 Motors, Electric, Character of Losses in, 427 Motors, Electric Elevator, Requirements for, 451 Motors, Electric, Methods for Revers- ing Direction of Rotation of, 42s Motors, Electric, Slow-Speed, 428 Motors, Electric Use of, on Constant- Current and Constant-Potential Mains, 422 Motors, Forms of Starting Resistances for, 424 Motors, Induction, 510 Motors, Induction, Advantages of, 510 Motors, Multiphase Induction, Auto- Starter for, 514 Motors, Multiphase Synchronous, kii Motors, Regulation of Speed ox, by Varying Coils of Field Magnet^ 420 Motors, Separately Excited, 417 Motofs, Series-Wound Electric, Meth- ods of Starting, 437 Motors, Shunt-Wound Electric, 418 Motors, Starting Resistance for, 423 Motors, Synchronous Multiphase, 509 Multi - Carbon Incandescent Lamps, Kohn's Improvements on Ladiguine's and Koslofi's, 261 Multi-Circuit Arc-Light Generator, Ad- vantages of. 236 Multiplmse Alternating-Current Systems, 50^ Multiphase Alternatii^ Currente. Ad- vantages of, for Operation of Eaectric Motors, 505 Multiphase Alternating Electric Cur- rents, 79 Multiphase Electric Motor, Bailey's Pro- totjrpe of, S03 Multiphase Electric Motor, Early Work of Bailey, Ferraris, Bradley, and Tesla on, 503 Multiphase Induction Motor, Secondary Core of, 513 Multiphase Induction Motor, Some Pe- culiarities of, 51^ Multiphase Induction Motor, Westing- house Company's Type of, 511 Multiphase Induction Motor, Westing- house, Different Parts of, 512 Multiphase Induction Motors, Auto- Starter for, 514 Multiphase Motor, Bradlejr's, 504 Multiphase Motor, Early Work of Ni- kola Tesla on, 504 Multiphase Motor, Ferraris's Early, 503 Multiphase Motors, Synchronous, 569 Multiphase Synchronous Motors, 511 Multiple and Series-Connected Incandes- cent Electric Lamps, Distribution of, 317 Multiple Arc-Light Circuits, 166 Multiple - Connected Arc - Light Circuits, 168 668 INDEX Multiple - Connected Are LamiH Hand Switch for* If 7 Multiple - Connected Arc Lamp, Safety Foae or Automatic Cut-Out for, 178 Multiple Connection of Armature Coils, Multipolar Dynamoa, la MoTabie Electric Conducton, Caoaea of Attractiona and Repulaiona of, 4x1 Mystery, Seeming, ox Electric Propol- aion, 458 N Nafou*8 Process for Increaaing the Denaity of Artifidal Carbona, 190 Nature and Formation of Voltaic Ar& 116 Necessary Properties of Artificial Il- lumination, 130 Necessity for Frequent Incandescent Lamp Renewals, 300 Necessity for High Vacnnm in Globe or Bulb of Incandescent Electric Lamp, 278 Necessity for MainteQanoe of Constant Electric Pressure on Incandescent Lamps Fed from Constant-Potential Maina, ^i Need for Kefractory Substance for Aro- Light Electrodes, 130 Negative Carbon of Carbon Voltaic Arc^ Formation of Nipple on, xs6 N^stive Electrode, Action of Intense Heat of Positive Crater on, 13a Ne^tive Electrode, Deposition of Graphite on, 132 Negative Main of Three-Wire System of Incandescent Electric Lamp Dis- tribution, 326 Nemst Electric Incandescent Lamp^ 363, Nemst Lamp, Automatic, 364 Nemst Lamp, Ballast for, 365 Nemst Lamp, Circuit Arrangements o^ 366 Nemst Lamp, Daylight Color- Values of, 368 Nemst Lamp, Efficiency of, 368 Nernst Laznp, Electric Pressures and Currents Employed for, 368 Nemst Lamp, Glower for, 366 Nemst Lamp, Glower of, 363 Nemst Lamp, Heater Case of, 373 Nemst Lamp Holder, 364 Nernst Lamp, Method for Removal of Deposit ox Platinum Black in Interior of Lamp Globes of, 373 Nernst Lamp, Non-Automatic, j^ Nernst Lamps for Out-of-Door Lighting, 370 Nemst Lamps, Wurtz on. Incandescent Electric Lamna, 349 Oliver WendeU Holmea'a broomstick Train," 4SS Omaha Exhibition, Illumination of Grand Court of, 316 Open and Enclosed Are Tjuaaps for Street Illumination, Ryan on Rela- tive Merits of, 184 Open Coil Arc-Light Generators, Why Preferable on Cxrcnits Containing Many Lamps, 235 0])eration of Dynamo, Causea Produc- ing Noises During, 60 Operation of Electric Street Cars, Gen- eral Method of, ±67 Outer Globes for Arc Lamps, Various Shapes of, 219 Output of Dynamo, 9 Overhead-Trolley Mechanism for Street Cars, A79 Overhead vs. Undei^rround Feeders for Electric Street Cars, 484 Overtoad, Sparking Due t^ co Ozone, Formation of, in Carbon Voltaic Arc, xa8 Pacihotti Ring Armature, 22 Pacinotti's Electric Motor. 405 Pacinotti's Knowledge of Reversibility of Dynamo and Motor, 406 Page. 402. 4^1 Pagers £Iectric Locomotive, 461 INDEX 659 Page's Electric Motor, 4^03 Page's Electro - Magnetic Motor. Trial of, on Baltimore ft Ohio Railroad between Washington and Bladena- burg, 404. DistriDutmg isoar<is, 3*. Paper Carbons, Edison's, for incandes* Panel or Distributing Boards, 352 imp. cent Electric Lamps, 267 Paper Carbons for Incandescent Electric Lamps, Brief Life of, a68 Parallel Connection of Armature Coils, 19 Parallel Connection of Incandescent Electric Lamps on Constant-Potential Mains, 321 Parallel Connection of Ring-Armature Coils to Four- Part Commutator, 21 Parasitical Currents, 28 Parasitical or Eddy Currents. Develop' ment of, in Pole Pieces ot Dynamo, 28 Parts, EssentiaL of Electric Motor, 392 Pasted Lamp Filament Joints, 287 Peculiarities of Multiphase Induction Motor, 513 Percentage of Light Absorbed by Arc- Light Glass Globes, 219 Period, Definition of, 65 Perrine on California Electric Trans- missions, 536 Phenomenal Increase in Use of Alter- nating-Current Enclosed Arc Lamps, 206 Photographic or Actinic Power of Arc Light, 150 Photometer, Bunsen, 143 Photometer, Shadow, Principle of, 142 Physics of Carbon Voltaic Arc, 125 Physics of Incandescent Electric Lai 270, 281 Pilsen's All-Night Carbon Plate Arc Lamp, 19^ Pinkus s Air-Propelled Cars and Ves- sels, 461 Pinkus's Early Patent for System of Electric Propulsion of Cars, 460 Pixie, 69 Platinum Incandescing Electric Lamp, Edison's Automatic Cut-Out for, 266 Platinum-Iridium Incandescent Electric Lamp, Staite's, 252 Platinum, Why l^d for Leading-In Wires for Incandescent Lamps, 288 Platinum Wire, WoUaston's Method of Obtainin|^ Fine, 247 Plowing, Electric, ^32 Points, Feeding, 483 Pole Pieces of Dynamo, Development of Eddy or Parasitical Currents in, 28 Pole Pieces of Dynamo-Electric Ma- chine, 7 Pole, Trolley, 480 Polyphase Alternating Electric Currents, 79 Porcelain Heater for Nernst Lamp, ^65 Porcelain Knobs and Cleats for Inside Wiring, 354 Positive and Negative Carbons. Change in Appearance of. Produced During Use in Arc. Rapid Tranak and the Growth of Citica, ^457 Irartaiifff, 70 . . ^ p^«^*«MH> Produced by Introduction of Condenser in a Circuit, 72 Reactance, Production of, by Sclf-Io- ductiott or Inductance, 70 Reaction Principle of Dynamo, 63 Real Horses vs, Elcctnc Horses. 459 Reductioa Gear for Electric Motors, 430 Reflectors and Shades for Enclosed Arc Lamps, SX7 Reflectors or Shades for Incandescent Electric Lamps, 345 Runilatton of Shunt and Series-Wound ^ttotors. Methods Employed for, 426 Regulator, Archereau's Solenoidal Arc- Automatic Arc- Licht, 163 CffUll Automatic vs. R^uiator, Duboscq's Liafat, 164 Relators, Arc-Light, Hand, 176 Regulatota, Automatic Aro^Light, 154 Regulators for Series-Wound Dynamos, Relation between Candle - Power and Area of Cross-Section of Incandescing Filament, a99 Relations between Mechanical and Elec- tric UniU of Work and Activity, 10 Relative WeightB of Conductors Re- quired for Different Systems of Lamp Distribution, ^8 Relief Lamps tor Series-Connected In- candeacent Electric LamM. 320 Requirements for Electric Elevator Mo- tors, 451 Requirements for Electric Meters, 357 Requirements of Series and Multiple- Connected Arc-Light Circuits, 168 Residual Atmosphere of Oxygen in In- candescent Electric Lamp Bulb, Dele- terious Effects of, 279 Resistance and C.E.M.F. of Carbon Vol- taic Arc, 135 Resistance Incandescent Electric Lamps, 306 Resistance, Spurious or Apparent, of Alternating-Current Circuit, 70 Resistance, Starting, for Motors, 423 Resistance, Steadying, for Nernst Lamp, 365 Resistances, Starting, for Motors, Forms of, 424 Reversal of Direction of Electro-Dy- namic Force, Cause of, 412 Reversibility of Dynamo and Motor, Discovery of, 406 Reversibility of Dynamo and Motor, Siemens on, 406 Reversibility of Dynamo, Fontaine's Claim of Invention of, 407 Reversibility of Gramme Machine, Early Exhibition of, 408 Revolving - Field Alternator, General Electric Company's Method of Windp tng Field Coils of, 93 Revolving-Field Altemaier. Stanley Elec- trie Company's Type ot 94 , Revolviag-FieM Magnet Poles for Al- ternators, 83 Revolving-Field Triphase Generators for Meuopolitan Street Railway System of New York City, 53a Reynier's Improved Semi-Incandescent Lamp. 163 Reyniers Semi-Incandescent Lamp, 162 Rheostat for Feeder Eoualizer, 325 RheosUt for Searchlight Projector. 226 Rigid Cot^iling of Series-Connected Mo- tors, Neoeaaity for, 423 Ring Armature Coils, Parallel Connec- tion of, to Four-Part Commutator, ai Ring Armature, Facinotti, aa Ring Armatures, 19 Ring-Core Transformer, Low Efficiency of, roo Ring - Wound Armature of Thomson- Houston Dynamo, 241 Ritc^^i^i 69 Ritchie's Electro-Magnetic Motor, 399 Roadbeds for Electric Car^ Care Nec- essary in Construction of, 484 Roberts s Incandescent Grs^ifaite Lamj^ 255 Roberts's Incandescent Lamp, Incorpo- ration of lime in Materul of Filar ment of. 255 Rope, Trolley, 479 Rotary Converter, 527 Rotary Converter, Action oU 528 Rotary Converter, Method of Starting, 529 Rotary Converter, Triphase, 529 Rotary Converter, Wonderful Flexibil- ity of, 530 Rotary Converters, 521 Rotary Converters for Sub-Stations in Transmission Systems, 526 Rotary Field Motor, Preece on the In- dependent Discovery of, by Ferraris and Tesla, 502 Rotary Transformer, 527 Rotating Magnetic Field, Production of, by Dq>hase System, 508 Rotation of Electric Motor, Conditions for Reversal of, 390 Rotor. Definition of, 510 Running Guard Wire for Trolley Wire, 477 Ryan on the Relative Merits of Open and Enclosed Arc Launps for Street Illumination, 184 Safe Distance between Positive Md Negative Mains in House Wirings 351 Safety- Devices for Transformers, in Safety Fuse^ Blowing of, 3^ Safety Fuse for Inaide Wiring, 354 Safety Fuse or Automatic Cut-Out for Multiple-Connected Arc Lam^ 178 Sale, Commercial, of £lectri«aty, 356, 362 Sand Box for Electric Street Railway MotM-, 47a INDEX 561 Sawyer-Mann Incandescent Laoiih Early Form of, 26s Sawyer-Mann Incandescent Lamp, Glass Mount lor, 289 Saxton, 60 Sealing Off of Completely Exhausted Incandescent Lamp Bulbs, 294 Searchlight, Lamp Mechanism for, aa^ Searchlight Projector, Rheostat or Vari- able Resistance for. 226 Searchlights, 222 Secondanr Core of Multiphase Induc- tion Motor, 513 Secondary Generators, 97 Self-Aligninf|[ and Self-Oiling Bearings for Electric Motor, 434 Self-Excited Dynamos, 12 Self-Governing Power of Compound- Wound Electric Motor. 420 Self-Governing Power ox Shunt-Wound Electric Motor, 418 Self-Induction iind Capacity, Effect o^ in Alternating-Current Circuits, 70 Self-Oiling and Self-Aligning Bearings for Electric Motor, 434 Self-Oiling Bearings, 39 Self-Regulating Action of Alternating* Current Transformer, j^ Semi-Incandescent Electric Lamp, Nol- let's. 5? Series-Wound Electric Motor, 410 Series-Woun4 Electric Motors, Methods of Startinib 4^7 Series-Wound Motor, Diagram Showing Connections of. 419 Series-Wound Motors, Connection of. in Series Across Constant-Potential Mains, 422 Service Switch for House Wiring, 3ss Service Wires for House Wiring, 351 Seven - Wire System of Incandescent Electric Lamp Distribution, 328 Sextipolar Motor, Crocker- Wheeler Type of, 442 Sextipolar Slow • Speed Electric Motor, Lundell, 441 Shades and Reflectors for Enclosed Axe Lamps, 2x7 Shades or Reflectors for Incandescent Electric Lamps, 345 Shadow Photometer, Principle of, 14^ Shell Transformer, Stanley Electric Company's Type of, 106 Shell Transformer, Varley's, xoi Shell Transformer, Zippernowski's, lox Shell Transformers. 102 Shell Type of Transformer, General Electric Companv's, 106 Shell Type ox Transformer, Westing- house Electric Company's. 105 Short Carbon Arcs, Why Seldom Com* mercially Employed, 136 Short Life of Early Electric Incandesc- ing Lamp Filaments, 278 Shunt ana Series Magnets of Are Lamps, 172 Shunt and Series-Wound Motors, Meth- ods Employed for Regulation of, 426 Shunt and Series-Wound Motors, Ne- cessity for Starting Resistance in, 423 Shunt Circuit, 55 Shunt-Wound Dimamo, 54 Shunt-Wound Dynamo, Action of, 55 Shunt- Wound Dynamo, Nearly Constant- Current Strength Produced by, 56 Shunt-Wound Dynamos, 12 Shunt-Wound Dynamos, General Uses Shunt-Wound Electric Motor, Diagram Showing Connections of, 418 Shunt-Wound Electric Motor, Self-Gov- emtnir Power of, 418 Shunt- Wound Electric Motors, 418 Shunt-Wound Motor, Diagram of Con- nections of, to Constant - Potential Mains, 436 - « ^ Shunt-Wound Motor, Methods of Start- ing, 436 VoU li.— 25 S^B FffTTTt of A>tfmM***g Electric ^ifiri^ ft Hililrr'i Elcctrv Bailvajrr e-Tndi Boadb Spui- for TroUcj Win for. Salt Iiaa Wirt Core of Granmc Rind SdeooidU Arc-Li(ht Ragnlitor, Arche- Siiuil An-Luht Carbom, ig> SalomOD ukTHI* Seirch te- ■ NorcUr, Soreo Blortli, 6] Sorting Cirboniied LuDp FQunoit^ 1I4 Source, Lnmiaoiie, CaBcDe-Power o£ tj9 Source, IjunliUHie Inteoiitj of, 130 Span Gnird Wire for Snpportinc Trolley Wirt, «7 Spu-win Snworu for TroDer Win for Kdgle or Double-Track Koodi, Spaniac at Commutator Bruhe* of If Due Sparking Due to Improper Podllon of SpaikintDae 10 Insufficient Field Flux, SpaikiDS Dae to OvcrlMd sf M~-i-i-t, Speed of Motor*, SenlattOB o^ Iit VaiTiac Coil* of HeU Hacael^. 4i« Spead oTILotatiaa of Armatiue, Eflecl of, on Value of EJLF.V8 Sptcndora of Vohaie Ai^ DaTT** ExU- bitioo o^ iij Incandeacing Qectrie Fitementa, .,. of Al- tcnutiiis Electric CiFciut. nt Squirted Caiboa FBaneiitfc AdraatHea of, 3B3 Staite'and Edinrd(*a Artibcial Carboas, bon Electric Lamp, s5< Sttile'i PlatimaB - Indii Electric Lain] Standard Candle, i» Standard CuuUe, Cireamnaacet Affect' ins Rdiabilitjp of, 141 Stanilard Electric and Ba; Conntiei Power Compinici* IJnca ia California, Stuidard Electric Companr, Prccantkn- ary Heaaurei Adopted bw, J37 Steidard Electric Power Compwiy, S]6 Standard* of LtuniooBi Iirtenaitr. i«* Stanle* Electric Compaiij'a Rerolnw Kieia AltematoT, 94 Stanlew Electric Cosmaar'i Shell Trpe of Tranaformer, 106 Stiniev Electric Compu^i Tmaforui- cr, Primary and S^ondary Coila for, StarriKinc'i Carbon Lamp, OaolatioB from ^edfiealion of Bntiih Patent Stirr-King'B Incandocent Carbon taae, Um of Torricellian Vacoom in, 350 Starr-King's Incasdeicent CarbMi-Vacu- Stivr'a Incandeacent Electric Laanp, 349 Starting ReiiiUnce for Motoia, iaj Starting Resistance, Necesaitr (or, is Botb Shunt and Seriea-Winind Mo' Starting Keaiitancea for Hoton, Forrat Starting Rotary ConTcrter, Method nf. Starting Series-Wound Electric Hoton, INDEX 663 Statistics of Electrically Driven Eleva- tors, 453 Stator, Definition of, 510 Steadiness of Voltaic Arcs, Value of Cored Carbons in Insuring, 138 Steady Light Produced by Alternating- Current Arcs, Cause of, 137 Steadying Resistance for Nernst Lamp, 365 Steam Traction vs. Electric Traction, Step-Down Transformer, General Prin- ciple of Action of, 98 Step-Down Transformer, Use of, in Al- ternating-Current Arc Lunp, 308 Step-Down Transformers. Hign-Pressure Power Transmission with, at One End of Line, 518 Step-Down Transformers, Use of, 96 Step-Up Transformer, General Prmciplc of Action of, 99 Stereopticon or Lantern, Incandescent Electric Lamps for, 339 Stick Pins, Incandescent Electric, 341 Street Car, Electric, Four-Motor Double- Trucl^ 469 Street Cars, Electric. 456 Street Cars, Electric, General Method of Operation of. 467 Street Cars, Electric, Phenomenally Rapid Growth of, 464 Street Cars, Lightning Arresters for,479 Street Railway Cars, Incandescent Elec- tric Lamp tor, 488 Street Railway, Electric, 467, 489 Street Railway Incandescent Electric Lamps with Anchored Filaments, 33a Street Railway System, Metropolitan, of New York City. Map of, ui Street Railways, Enormous Capital In- vested in. 465 Strength ot Magnetism of a Permanent Magnet Increased by Sudden With- drawal of Its Armature, 33 "Striking the Arc.*' 133 Structural and Structureless Incandes- cent Carbon Lamp Filaments, S83 Structure, Possible Compact, of Electric Locomotives, 49s Sturgeon's Early Electric Motor, 395 Sturgeon's Wheel, 395 Sub - Station Details for Metropolitan Street Railway System of New York City, 53a Sub-Stations for Electric Power Trans- mission. 533 Subway Transformers, 108 Sudden Reversal of Direction of Rota- tion of Motor, Danger of. Without the Use of the Rheostat, 435 Sunburns, Arc-Li^ht, 150 Sunlight, Composition of, 144 Supply of Electricity, Basis of Charge tor, ^58 Surgical Incandescent Electric Lamps, -336 Surgical Lamp. Use of, for Examination of Throat of Patient, 336 Suspension Cables and Hangers for Telpher Tracks, 498 Switcn, Break-Down, 355 Switch, Canopy, 488 Switch, Hand, for Multiple-Connected Arc Lamp, 177 Switch Handle for Controller Box, 475 Switch, Exjualizer, 324 Switch for Various Connections of Sep- arate Primary and Secondary Trans- former Coils, X07 Switch, Isolated, tor Arc Lamps, 215 Switch, Mechanical Cut-Out, for Arc Lamps, ai^ Switch, Service, for House Wiring, 352 Switchboards, Electric, 352 Symbol for Cvcle, 65 Synchronous Motors, Multiphase, 511 Sjmchronous Multiphase Motors, 509 System, Electro-Magnetic, Contact for Trolley, 482 System, Third-Rail Trolley, 482 Systems, Multiphase Alternating - Cur- rent, SOS Tapskzno or Conical Conductors. Telpher Track, 498 Telpher Tracks, Suspension Cables and Hangers for, 498 Telpherage, 497, 50X Telpherage Handlers vs. Baggage Smash- ers, 500 Temperature, E£Pect of, on Daylight Values of Incandescing Electric Fila- ment, 27Z Temperature, Effect of, on Efficiency ot Incandescing Filament of Electric Lamp, 270 Temperature, Influence of, on Emissiv- ity of Glowing Filament, 278 Temperature Limits of Dynamos, 58 Temperature of Boiling Point of Car- bon, 129 Temperature of Free Boiling Liquid Limited to Temperature of Its Boil- ing Point. 129 Terminals of Incandescing Filament, Ne- cessity for Maintaining Constant Pres- sure at, 300 Tesla. $0% Tesla^s High-Frequency Discharges, 385 Tesla's Rank First as Inventor of the Multiphase Electric Motor, 503 Theatre of the Royal Institution, Davy's Description of the Voltaic Arc Ex- hibited at. X19 Theatrical incandescent Electric Lamp, 331 Therapeutic Generators, 13 Thermo- Static Electric Heater for Edi- son's Chemical Meter. 360 Thiers and Lacassagne's Great Inven- tion of Two-Magnet Arc Lamp for Series Circuits, 156 Third-Rail Trolley System, 482 Thompson, S. P., Definition of Dyna- fiKhElectric Machine by, 6 Ttmnwi - Booaton Arc - ti^ Dtaamn, ••d AMtowuk RacnlMac, Diisnat « Cinait Coimctio— lor, mo Tbomwo ■ UcuMoci DyauM^ Air BliM TboouoD-Hourton OjBaBo, Bios-Wauad Thftf ll«M-iit bimuu*, jf Thna Coadaetor^ DipbaK Sjucin wit^ ThrM.Wire SyileL. .. Ekctik Lamg DiNnbotiaa, Edasali, ThiM-Wirc Sinlem of ImBiiilwiiinl Helm- Electric Lamp DutributioD, Ho^ nf New Ttara-WiR StMciu of InundeKCiit r Sko ElRtn La^r Dirtribnliash fXitO- liana to, u; inaStw Ttd*l F1o« of^Vuer in Rirar, Cum iSr Riw^ Auli^iK ol Flow o( to c — •- '<i^ HotOT-DriTB^ 4 -Mitlw4-Cm Ar««i— Electric ComputT^ HiJfUH ■ Siged Bel^Drivell GettKaloi; 4$ ■Mted'CMB AmMar* for Waniaf- bonae Aheraator, 8* T«a«kd-Can AnaaMna, u ToalteA-Cara Armataio, Advaataica PoaKHcd by, 36 TM^aa and Spaad. Fower of llatar Da- TorricelliaiiVacuuiD, ITie »U in Stw- AlcaraaliiiK Eleetne Conann, tj 17 Tool, Motor^rtvea Pnachiag, 431 BMUnL TooT- ■•-—'-' — Taotlw4-Ca(« Arautma lor GcBcral Lunn '50 B Ga» Total Uectin Oeaataaee of Altcraal- tavCancat Circait 71 TotJ Inteiuit;r °t IJVA aad Area of 4>t Pealtiva Civtei. ijo Town LMita« W Arc Lavsa, jii b Caa- Tower Lifbting, Winefnt DlBminatioa TraA far Etectrie Street Cara, Coa- Tracfc, TelpbcT, 408 ■O'raiik BraemMi^'' 4M iuhiiII Traaaianaer, Coaataat-Carreab aai Tnnifsimer Freqiiraciefc iii iar, 477 Tianatonaer I nairi, 109 Traaeformer, Uotor, 537 Traiuformer, RoUrr, sij ■ Ittn, Trunlixma, VaclcT'a SbeH. lai TnuwfomieT. ZippemDw»1ii*i SbeB. ici Tranaformfra, AUcrBatiiwCBiTeBt, gg TraMforaMTi at Each £ad of Lute, Hiab Freaaure Electric Powei Tiana- I, oa-coo , .., ^ .. -^ ,-j, Safety Devicca for, i Tranefomen, Shell, >« INDEX 665 Two-Magnet Arc Lamp for Series Cir^ cuits, Lacassagne and Thiers's Great Invention of, 156 Two- Part Commutator, Action of, 15 Two-Part Commutator, Faraday on Ac- tion of, 16 Tylerian Society at Haarlem, Powerful Leyden-Tar Battery of. 115 Type^H Transformer, General Electric Company's Oil-Cooled, 103 Types of Armatures for Alternators, 81 Types of Fan Motors, 448 U Umbrsi«i«a Type of Electric Generator, 43 Underground vs. Overhead Feeders for Electric Street Cars, 484 Under- Running Trolley System, 481 Unequal Consumption of Positive and Negative Carbons in Direct-Current Arc, 13^ Unit of Activity, xo Unit of Rate of Doing Work, xo Unit of Work, g United States Census Report for x^oo on Increase of Enclosed Altematmg- Current Arc Lamps for Street Light- ing, 207 United States Census Report on Manu- facture of Incandescent Lamps, 28a United States Census Report on the In- crease in the Use of Small Electrically Driven Fans, 448 United States, Electric Railway Com- pany of, 463 United Sutes Mint at Philadelphia, Electric Motor Installation in, 442 United SUtes Mint at Philadelphia, Processes of Coinage Emplo^red in, 443 Unsteadiness of Carbon Voltaic Arc, 12s UnsuiUbility of Charcoal or Gas Re- tort Carbon for Commercial Arc Lighting, 151 Use of Bracket Lamps, 3x4 Use of Step-Down Transformers, 96 Useful Life of Incandescing Lamp, 300 Vacuous Spacxs, Formation of Vbltaic Arcs ill, 124 Vacuum Break, Moore's, 38a Vacuum-Tube Discharges, van Marum's Luminous, 115 Vacuum - Tube Electric Lamp, Morris, Weare, and Monckton's, 257 Vacuum-Tube Lamp, Hawkesbee's, 380 Vacuum-Tube Lamps, Objections to, 382 Vacuum-Tube Lamps, Some Advantages of, 380 Vacuum-Tube Lighting, 380. 386 Vacuum-Tube Lighting, Early Form of, 114 Vacuum-Tube Lighting, Low Percentage of Heat Energy in> 381 Vacuum-Tube Lighting, Moore's Vacuum Rotator for, 383. ^ Vacuum-Tube Lighting. Tesla's Proposi- tions Concerning, 386 Vacuum-Tube Radiations, Cause of Low Temperature of, 381 Value, Practical, of Counter E.M.F. of Motor, 415 Van Malderen, 156 Van Marum's Incandescing Metallic Conductors, 245 Van Marum's Luminous Vacuum-Tube Discharges, X15 Vapor Lamp, Cooper-Hewitt, 37S> 379 Variable Resistance or Rheostat for Searchlight Projector, 226 Variable-Speed Fan Motors, 449 Various Positions of Arc-Light Carbons, 153 Various Sources of Light of Carbon Voltaic Arc, X46 Varlev's Shell Transformer, xox Ventilation of Rooms by Motor-Driven Exhaust Fans and Blowers, 439 Volt-Amoftre. xx Volt-Coulomb or Joule, xo Voltage of Trolley Wire, 476 Voltajvs, Incandescent Lamp, 303 Voltaic Analog[ue of Two Seiies-Con- nected Voltaic Batteries and Series- Connected Coils on Opposite Halves of Gramme-Wound Armature, 23 Voltaic Arc, Cause of Bow or Are Shape of, xx8 Voltaic Arc, Establishment of, by Ley- den- Jar Discharge, 123 Voltaic Arc, JExtinction of, by Approach of a MagneJL 122 Voltaic Arc, Formation and Nature oL 1x6 Voltaic Arc, Great Deflagrating or Heat- ing Power of, 120 Voltaic Arc, Splendors of, 120 Voltaic Arcs, Formation of, in Vacuous Spaces. ElM- atreel ShcQ ZirmvowiKi'i Shell Trainformer, END or V(H.UME TWO YC ^%% ri ■ 't *,t. 