None
Probable Nature of 10 Current, Electric ... 41 to 48 Current, Electric, Does Not Pass Through Conductor 41. 42 Current, Periodic-Alternat- ing, Definition of 233 Current, Sinusoidal 236 Curve, Sinusoidal 237 Curve, Simple-Harmonic . . 237 Curve, Simple -Periodic... 237 Curves of Reluctivity in Iron and Steel in Relation to Flux Density 107 Cut-Out, Film 213, 214 Cycle, Definition of 234 D. E. M. F 170 Daniell Voltaic Cell .... 84, 85 Density of Current 45 Density of Flux, Definition of 90 Depolarizer 81 Derived Circuit, Applica- tion of Ohm's Law to. . . . 52 Detectors, Phase 264 Diagram, Hysteretic 142 Dielectric Displacement , Current in 2 Dielectrics. Maintenance of Electric Displacements in 2 Difference of Potential ... 13 Differential Calculus, Sim- ple Explanation of 43 Direct Electromotive Force of Generator 170 Diphase, Alternator 265 Diphase, Connection of In- terconnected Circuits 266 Diphase Connections, Sep- arate Circuits 266 Diphase e. m. f.'s 266 Displacement Current, Probable Nature of 10 Displacement Flux, Nature of 2 Displacement Strain. . . .9, 10 Displacement, Electric, Na- ture of 2 Double-Carbon Arc Lamps 224 Double-Fluid Cells, Defini- tion of 82 Drop in Circuit 50 D3mamo and Motor, Co- Generation of Electro- dynamic and Electro motive Forces in 169 Dynamo, Counter Electro- dynamic Force of 170 Dynamo-Electric Machine, Armature of 150, 151 Dynamo-Electric Machine, Classification of Losses in 1 37 INDEX, 285 Dynamo-Electric Macliine, Electrical Losses in. . 138, 139 Dynamo-Electric Machine, Lead of Brushes of.. . . 149 Dynamo-Electric Machine, Limitations to Output of, Classification of 145 Dynamo-Electric Machine, Mechanical Losses in, 137, 138 Dynamo-Electric Machine, Principles of Design of .. 133, i34» 135 Dynamo, the 128, 152 Dynamos and Motor, Dif- ference of Output of . 1 8 1 , 182 Dyne, Definition of 5 Dyne Centimetre, Defini- tion of 6 E. M. F 9 to 16 E. M. F., Alternating, De- finition of 233 E. M. F., Circular Type of Periodic-Alternating 235 E. M. F., Direction of In- duced, Rule for Deter- mining 123,214 E. M. F., Effective, Value of 239 E. M. F., Monocyclic Dia- gram of 271 E. M. F., or Current, Alter nating Flat-top Type of.. 235 E. M. F. of Self-induction . . 127 E. M. F. of Voltaic Cell, Cal- culation of 76, 77 E. M. F., Periodic Alternat- ing, Definition of 233 E. M. F., Self-Induced 127 s. M. F., Sinusoidal 236 E. M. F., Sources of, in Vol- taic Cell. 67, 68 E. M. F.'s, Diphase 266 Earth's Crust, Resistance of 31, 32 Earth's Crust, Resistivity of Materials Forming. . . 30 Edison-Lalande Voltaic Cell 86, 87 Eflficiency, Commercial, of D3mamo Electric Ma- chine 137 Efficiency of Electrical Dis- tribution, Definition of.. 51 Efficiency of Lamp 207 Efficiency of Lamp, Effect of Temperature on 207 Efficiency of Lamp, So- called 207 Efficiency of Lamp, True. . 207 Efficiency of Voltaic Bat- tery 71 Electric Capability of Gene- rator 131 Electric Circuits 57, 64 Electric Discharge, Classi- fication of Effects of 3 Electric Displacement, Maintenance of, in Non- conductors or Dielectrics 2 Electric Displacement, Nature of 2 Electric Motor, Continuous Current Type of . . . 168 to 192 Electric Railroad Motor. . . 180 Electric Sources 13 Electric Sources, Classifica- tion of 14 Electrical Effects i to 8 2S6 INDEX, Electrical Energ^y of Voltaic Cell, Cost of 69 Electrification, Nature of . . 10 Electro-Chemical Equiva- valents. Tables of 74 Electro- Dynamic Force of Dynamo 170 Electro-Dynamics ... 161 to 168 Electro-Dynamics, Defini- tion of 161 Electrolyte, Action of e.m.f. on 73 Electromagnet, Attractive Form of 119, 120 Electromagnet, Portative Form of 118, 119 Electromagnets 1 13 to 1 20 Electromagnets, Attractive, Definition of 113 Electromagnets, Computa- tion of Attractive Force of 114, 115, 116 Electromagnets. Determin- ation of Polarity of 113 Electromagnets, Dual Char- acter of Flux in 113 Electromagnets, Iron-clad. 119 Electromagnets, Induced or Structural Magnetic Flux of 113 Electromagnets, Portative, Definition of 113 Electromagnets, Prime or Magnetizing Flux of . . . . 113 Electromotive Force of Electric Sources 14, 15 Electro-plated Arc Carbons 223 Element of Voltaic Cell. ... 66 Energy, Conservation of . . 4 Energy, Definition of 3 Energy, Doctrine of Con. servation of 4 Energy, Kinetic, Definition of 3 Energy, Potential, Defini- tion of 3 Energy, Potential, a Pos- sible Variety of Kinetic Energy 4 Energy, Total Amount of, in Sun 7 Entrefer, Definition of, 150. 151 Equivalent, Electro-Chem- ical .74, 75 Equivalent Resistance 253 Erg, Definition of 6 Erg. Value of 6 Ether, Stresses and Strains in I, 2 Excessive Heating of Dy- namo-Electric Machine, Limitations to Output of. Caused by 144, 145, 146 Factor, Impedance 254, 255 Feeders 215 Ferric Circuit, Calculation of 108, 109 Ferric-Magnetic Circuit. ... 93 Filament, Causes of De- crease of Cross- Sectional Area of 210 Filament. Coking of 209 Filament, Decrease of Area of Cross Section of 208 Filament, Disintegration of 208 Filament of Incandescent Lamp ^.. 210 INDEX. 287 Filament of Incandescent Lamp, Variation of. Dur- ing Use, 209 Film Cut-out 213, 214 First Harmonic, Frequency of 258. 259, 260, 261 Five- wire System 61 Fleming's Hand Rule for Direction of Induced E. M. F 123, 124 Fleming's Hand Rule for Motors 163 Flux Density, Definition of 90 Flux Density, Unit of go Flux, Displacement,Nature of 2 Flux Intensity, Definition of... ? Flux, Magnetic 89 Flux, Magnetic, Convention as to Direction of 89 Flux, Physiologically Effec- tive 206 Force, Counter Electromo- tive of Motor 170 Force, Definition of 3 Force, Electric i Force, Electromotive and Electrodynamic, Co-gen- eration of in Dynamo and Motor 169 Force, Magnetic, Definition of ^ 99, 100 Force or Stress, Electromo- tive, Cause of 2 Force, Varieties of. 3 Formulae for Resistivity.22, 23 Fourier's Theorem 258 Frequencies, Luminous and Non-Luminpus, .,,..,,. 201 Frequencies, Definition of. 234 Frequency of First Har- monic 258, 259, 260, 261 Frequency of Second Har- monic 258, 259, 260, 261 Fuller Voltaic Cell 86, 87 Fuses, Electric, Capacity of, for Heat 200 Galvanometer, High Grade Thomson's Mirror. ...47, 48 Galvanometer, Shunt... 36, 37 Galvanometer, Thomson's Mirror 36 Gases, Effect of Pressure on Resistivity of «6 Gauss, Definition of 90 Generator, Direct e. m. f. of 170 Generator, Electric Capa- bility of 131 Generator, Output of 130 Generator, Series Wound. . 154 Generator, Shunt- Wound . . 154 Gilbert, Definition of 92 Globes, Arc-light 231 Gravity Voltaic Cell. . . 84, 85 Grenet Voltaic Cell.... 82, 83 Harmonics 258 Heat, Development of in Safety Fuse 200 Heat, Dissipation of, by Electric Conductor 196 Heat, Loss by Radiation . . 197 Heat, Radiation of 197 Heat, Unit of 192 H^^ting, Electric . . .193 to 200 288 INDEX, Heating, Excessive, of Dy. namo-Electric Machine, Limitations to Output of, Caused by 144, 145, 146 Hefner-Alteneck Lamp . . . 205 High Resistance Appara- tus, Effect of Leakage on Accuracy of 37 Hysteresis, Definition of. . . 139 Hysteresis, Magnetic . . 139, 140, 141, 142, 143 Hysteresis, Magnetic, Loss of Energy of 141 Hysteretic Diagram 142 Hysteretic Loss in Alter- nating-Current Trans- former 276, 277 Illumination,Physiological, Coefficient of 203 Illumination, Physiologic- ally Effective 203 Illuminating Power, Phys- iologically Effective. . 202, 203 Impedance Factor 254, 255 Impedance of Circuit 244 Incandescent Lamp, Activ- ity of 7 Incandescent Lamp, Me- thods Proposed for Re- gulating Candle-power of 212, 213 Incandescent Lighting.. 201 to 224 Induced Electromotive Force 121 to 128 Induced or Structural Mag- netic Flux of an Electro- magnet II Inductance, Influence of on Sparking of Brushes of liynamo 147, 148 Induction. Counter-Electro- motive Force of 62 Inductor Alternators 257 Insulation Resistance of Line or Conductor 33 Insulator, Circumstances Affecting Resistance of. . 33 Insulator, Oil : . 33, 34 Intake of Machine, Defini- tion of 8 Intensity, Maximum of Arc Light 22X Intensity, Mean Horizontal, of Arc Lights 222 Intensity of Flux, Defini- tion of 90 International c. g. s. Unit of Quantity 11 International Ohm , Defini- tionof 17 International Practical Unit of £. M. F II Ions, Definition of. 73 Iron-clad Electromagnets. . 119 Joint Admittance 249, 250 Joint Resistance 51 Joule IQ4 Joule, Definition of 7 Kinetic Energy, Definition of 3 Kirchoff*s Laws 52, 53 Laborer, Average Activity of 7 Lamp, Carcel 205 INDEX. 280 Lamp, Effect of Tempera- ture on Life of 207 Lamp, Efficiency of 207 Lamp Globe, Blackening of 208, 211 Lamp, Hef ner-Alteneck . . . 205 Lamp, VioUe 205 Laws, Kirchoff's 52, 53 Lead of Dynamo Brushes.. 149 Leading Pole of Motor- Armature 186 Leakage Paths, Magnetic. . 96 Leakage, Magnetic, Effect of on Efficiency of Trans- former 277 Ledanche, Voltaic Cell 85 Lesser Calorie 192 Light, Standard of 205 Lighting, Load of Central Stations 212 Limiting Current Strength in Wires ig8, 199 Line or Conductor, Insula- tion Resistance of . ... 33, 34 Localized Vector 11 Loop, Conducting, Rotation of, in Magnetic Flux 126 Losses, Eddy Current, in Continuous-Current Mo- tors 174 Losses, Magnetic, in Dyna- mo-Electric Machine, 139, 140 Losses, Mechanical, in Dy- namo-Electric Machine, 137, 138» 139 Luminous and Non -Lumin- ous Frequencies 201 Luminous Radiation, Effect of Temperature 00 204 M. M. F 89, 96 M. M. F. . Unit of 92 Machine, Definition of In- take of 8 Machine, Definition of Out- put of 8 Machine, Dynamo- Electric, Commercial-Efficiency of 137 Machine, D3mamo Electric, Principles UnderlyingDe- signof 133, 134. 135 Machine, Efficiency of. ... . 8 Magnetic and Material Fluxes, Difference be- tween 91 Magnetic Circuits 92 Magnetic Conductivity 95 Magnetic Force, Definition of 99. 100 Magnetic Flux. ... 89, 104, 112 Magnetic Leakage, Effect on Efficiency of Trans- former 277 Magnetic Losses of Dyna- mo-Electric Machine 139, 140 Magnetic Permeability .... 95 Magnetic Reluctance 96 tQ 104 Magnetic Reluctance, and Magnetizing Force, Rela- tion between loi, 102 Magnetic Saturation 92 Magnetism Residual 93 Magneto-Dynamics, Defini- tion of 161 Magnetomotive Force 91 Magnetomotive Force, Structural 93 Mangin Reflector 230, 231 Maximum Intensity of Arc Light 221 290 INDEX. Mean Horizontal Intensity of Arc Lights 221 Mean Spherical Can die- Power of Arc Lights. ... 221 Megadyne , Approximate Value of 6 Megadyne, Definition of. 6 Megohm, Definition of ... 18 Megohm, Standard 30 Metal-Coated Arc Light Carbons 223 Metallic Reluctivity 103 Mho, Definition of 25 Microhm, Definition of 18 Molecules, Dis-associated:. 73 Molten-Platinum Standard 205 Monocyclic e. m. f., Dia- gram of 271 Monocyclic System 271 Monocyclic System Trans- former 272 Motion, Simple-Harmonic. 236 Motor-Armature, Leading Pole of 186 Motor- Armature, Reaction of 186, 187 Motor-Armature, Toothed Core 185 Motor-Armature. Trailing Pole of 186 Motor-Armatures, Smooth Core 185 Motor, Continuous-Current, Speed Varied by Shifting Brushes on Commutator 128, 177 Motor, Continuous-Current, under Constant Torque, Methods of Carrying Speed of ....... 177, 178, 179 Motor, Counter-Electromo- tive Force of 170 Motor, Electromotive Force of 62 Motor, How to Reverse Di- rection of. ..187, 188, 189, 190 Motor, Relation of Torque and Speed to Activity of 171 Motor, Series 179 Motor, Shunt 180 Motor, Starting Resistance of 181 Motor, Street-car 191 Motor, Torque of 167 Motor, Work Absorbed by, 170 Motors, Classification of for Torque and Speed of 171 Motors,Continuous-Current, Eddy Current Losses in.. 174 Motors, Electric, Weight of 190, 191 Multiphase Alternators. 265 Multiphaser 265 Multiple Arc Lighting, Cost 227, 228 Multiple Circuit 59 Multiple-Series Circuit .. 60 Multiplying Power of Shunt 36, 37 Negative Arc Light Carbon, Nipple on 219 Negative Charge 2 Negative Plate of Voltaic Cell 66 Negative Pole of Voltaic Cell 66 Negative Resistivity Tem- perature CoeflBcient %% INDEX, £91 Negative Terminal of Vol- taic Cell 66 Network of Conductors, Application of Ohm's Law to. 53 Nipple on Negative Arc Light Carbon 219 Non- Luminous Radiation.. 201 Obscure Radiation 201 Oersted, Definition of. .97 Ohm, International, Defi- nition of 17 Ohm, Multiples and Sub- Multiples of 17. 18 Ohm, Standard 29, 30 Ohm'sLaw 49 to 56 Ohm's Law, Application of, to Branch Circuit 52 Ohm's Law, Application of, to Network of Conduc- tors 53 Oil Insulator 33, 34 Output of Dynamo Electric Machine, Classification of Limitations to 145 Output of Dynamos and Motors, Difference be- tween 181, 182 Output of Generator 130 Output of Machine 8 Parallel Connection of Al- ternators 263 Partz Gravity Voltaic Cell 85, 86 Paths, Magnetic Leakage. 96 Period, Definition of 234 Periodic Alternating Cur- rent, Definition of 233 Periodic- Alternating e.m.f. Positive Carbon, Rate of Consumption of 228 Positive Charge 2 Positive Plate of Voltaic Cell... 66 Positive Pole of Voltaic Cell 66 Positive Terminal of Voltaic Cell 66 Potential Difference 13 Potential, Distribution of, in Continuous.Arc Light Circuits 226 Potential Energy, Difini- tion of 3 Power Factor of Alternate ing Current Transform- ers 280 Practical Unit of e. m. f. . . 11 Practical Unit of Electric Resistance 17 Practical Unit of Heat 194 Projectors for Arc Lights .. 229, 230, 231 Quantity, Electric, Com mercial Unit of 45 Quegohm, Definition of 18 Radiation, Non luminous.. 201 Radiation, Obscure 201 Radiation of Heat 197 Radiation, Physiologically Effective Luminous, Var- iation of, with Current Strength 211 Radiation, Standard, of Physiologically Effective Luminous 205 Railroad Electric Motor. . . 180 Ratio of Transformation .. 273. 274 Reactancfi of Circuit 244 Reflector, Mangin.... 230. 231 Regulation of the Dynamo 153, 160 Reichsanstalt Unit 205 Reluctance, Magnetic,9% to 104 Reluctance, Magnetic, Defi- nition of 97 Reluctance, Unit of 97 Reluctivity 97 Reluctivity, Curves of. in Iron and Steel, in Rela- tion to Flux Density .... 107 Reluctivity, Curves of, in Iron and Steel, in Rela- tion to Magnetizing Force 102 Reluctivity, Metallic 103 Residual Magnetism 93 Resistance, Balances. ..28, 29 Resistance, Electric 17, 40 Resistance, Electric, Nature of Unknown 36 Resistance, Equivalent 253 Resistance, Insulation of Cable 35, 36 Resistance, Joint 51 Resistance of Insulator, Circumstances Affecting, 33 Resistance, Specific 18 Resistance, Specific, Mag- netic 97 Resistance, Starting of Mo- tor 181 Resistance, Surface Contact 39 Resistances, Formula for Calculating 25 Resistances, Methods of Measurement of 26 to 31 INDEX. 293 Resistivities, Diag^m of, at DifferentTemperatures 2 1 Resistivities, Table of. . 19, 20 Resistivities, Thermal, Table of 196 Resistivity 18 Resistivity, Fornmlfie 22 Resistivity, Temperature Coefficients 19 Reversibility of Continuous- Current Dynamo. ... 170, 171 Resistivity, Thermal 194 Resonant Circuit 248 S. H. M 236 Safety Fuse, Development of Heat in 200 Saturation, Magnetic 92 Search Lights 229 Second-Harmonic, F r e - quency of. . . 258, 259, 260, 261 Self- Induced e. m. f 127 Semi-Period of Alternating E. M. F. or Current Wave, Definition of 234 Series Arc Light Circuits.. 225, 226, 227 Series Circuit 58 Series-Connected In- candescent Electric Lamps 213, 214 Series Motor 179 Series Motor, Commutation of Field Coils of 179 Series Motor, Method of Varying Speed of 179 Series-Wound Machine. . .. 187, 188 Shunt, Altemating-Current Circuit, MultiplyingPower of ^ 252 Shunt Circuit, Application of Ohm's Law to 52 Shunt, Continuous Current Circuit, Multiplying Power of 251 Shunt Galvanometer. ... 36, 37 Shunt Motor 180 Shunt Motor, Care Re- quired in Starting 181 Shunt, Multiplying Power of 36, 37. 251 Shunt-Wound Machines, Direction of Rotation as Motors and Generators.. 187, i88 Silver Chloride Voltaic Cell 87, 88 Simple-Harmonic Curve. . . 237 Simple-Harmonic Motion . 236 Simple- Periodic Curve 237 Single-Fluid Cells, Defini- tion of 81 Sinusoidal Current 236 Sinusoidal Current Circuit, Activity of 253 Sinusoidal Curve 237 Sinusoidal e. m. f 236 Smee Voltaic Cell 82 Smooth Core Motor Arma- tures 185 Sources, Electric 13 Sources, Electric, Classifi- cation of 14 Sources, Electric, Electro- motive Force of 14, 15 Sparking at Dynamo Brush- es, Cause of 147, 148 294 INDEX. Specific Magnetic Resis- tance 97 Specific Resistance, Defini- tion of i8 Speed and Torque, Classi- fication of, in Motors 171 Speed of Motor, Varied by Inserting Resistance in Armature Circuit 177, 178 Speed of Motor, Varied by Varjring Magneto-motive Force of Field Magnets.. 178, 179 Standard Candle 205 Standard Cell, Clark ...15. 16 Standard Megohm 30 Standard of Physiologfically Effective Luminous Radi ation 205 Standard Resistance — 29. 30 Star Triphase Winding, Diagram of 267 Star- Winding of Triphase Generator 267 Step- Down Transformer. 273 Step-Up Transformer 273 Strain, Displacement. .9, 10 Street-Car Motors 191 Stress, Electromotive,Cause of 2 Stresses and Strains in Ether i, 2 Structural Magnetomotive Force 93 Sun, Total Amount of Energy in 7 Surface, Contact Resis- tance 39 Table of Electro-Chemical Equivalents 74 Table of Resistivities 19, 20 Table of Thermal Resis- tivities 196 Temperature Coefficients for Clark Standard Cell. 16 Temperature Coefficients for Resistivity 19, 20 Temperature, Effect of, on Efficiency of Lamp 207 Temperature, Effect of, on Life of Lamp 207 Temperature, Effect of, on Luminous Radiation. 204 Temperature, Effect of, on Resistivity of Conductors 26 Temperature, Safe Limit- ing, of Wire 198, 199 Terminal. Negative , o f Voltaic Cell 66 Terminal, Positive, of VoltaicCell 66 Thales 1 Therm 192 Therm -Calorie 193 Thermal Conductivity 194 Thermal Resistivities, Table of 196 Thermal Resistivity. 194, 195 Thomson's High Grade Mirror Galvanometer. 47, 48 Thomson's Marine Galvano- meter 46 Thomson's Mirror Galvano- meter 46 Three-Wire System, Cal- culation of Current Strength in 55, 56 INDEX 295 Three Wire System, De- scription of 54, 55 Three- Wire System, Neutral Wire in 55 Toothed Core Motor-Arma- ture 185 Torque and Speed, Classifi- cation of, in Motors.. 171 Torque and Speed, Rela- tion of, to Activity of Motor 171 Torque of Motor 167 Trailing Pole of Motor- Armature. 186 Transformation, Ratio of 273. 274 Transformer, Step-Down. 273 Transformer, Step-Up 273 Transient Magnetomotive Force 91 Tregohm, Definition of. 18 Triangular Triphase Wind- ing Diagram of 267 Triangular Winding of Tri- phase Generator 267 Tricrohm, Definition of..., 18 Triphase Circuit, Analysis of 270 Triphase e. m. f's 267 Triphase e. m. f.*s, Diagram of 268 Triphase Generator, Star- Winding of 267 Triphase Generator, Wind- ing of 267 Triphase Generators, Tri- angular-Winding of 267 Unit Arc-Light Crater In- tensity 223 Unit of Activity, c. G. s 7 Unit of Flux, Density of. 90 Unit of Force, c. g. s 5 Unit of Heat 192 Unit of Illumination. Name Proposed for 206 Unit of M. M. F 92 Unit of Quantity, c. g. s. 11 Unit of Reluctance 97 Unit of Resistance, Prac- tical, Definition of 17 Unit of Work 6 Units, c. G. Page 23, H 23, 5 lines from bottom of page. For resistivity of a mile read resistance of a mile. •* 24, Syllabus, 9th line. For begohm read bierohm. - 34, IF 34. For R = \/H^ r^pp. coth-^ \/^ read i? = \^B^ r.pp. /tanh-' \/^ ■"•pp- ^2656 " 34, last line. For coth-i/v/^:^:^ read 1 / tanh" ^ ^ 6024 ^ ** 175, H 182. For reluctance read retardation. ** 203, " 211. For yellow read green. " 230, Fig. 77, caption. For Magnetic read Mangin. ** 258, IF 261. For ti— 1 read n + U " 264, Syllabus. For n^l read » -f 1. 6024 fl^D^as^^fl3^ b89092544832a ' .; ;\^: : ^ A^l,^^^-S: "J"^; 7^'^-^.^^-<i-^r^^ i^^^'l" $^-^E--" -^^^4^. v'^^'-:!'"' 3^ '^^^:;^" ■'■■-f" flimasMMfl3s B89092544832A. 