Index 



Electromagnetic waves, pro- 

 pagation 878 

 -, resonance 880 



- -, standing (or stationary) 



879 

 , velocity 878 



- in wires 880 

 Electromagnetism as motive 



power 775 

 Electromagnets 745 

 -, attractive power 746 

 -, forms 747 

 -, laws 599 

 , magnetism of 749 

 Electrometers 720 

 -, absolute 721 

 -, capillary 721, 803 

 -, quadrant 722 

 Electromotive force of arc 913 



Clark's cell 691 



contact 793 



, measurement 690 

 of polarisation 800 



- - primary cells 645 

 , theory 650 



secondary cells 656 



standard cells 691 



Weston cell 692 



Electronic theory of conduction 



682 



Electrons 554 

 Electrophorus 743 

 Electroscopes 723 

 Electrostatic and electromag- 

 netic units 558 



- machines, frictional 741 



- , induction- 742 

 Electrostatics (general) 559 

 Electrostriction 585 

 Emission of light, influence 



of magnetism 891 

 Energy, consumption in cur- 

 rents 693 



- of current, measurement 



705 



- in dielectrics 579 

 -, distribution 717 



- in electro-dynamic pheno- 



mena 873 



- losses by magnetic hyste- 



resis 618 



- measurement of alternating 



currents 695 

 -, transfer 555 

 -, transmission by electricity 



715 



Equations, electrodynamic 821 

 Equipotential lines in sheets 



and solids 684 

 Equivalents, electrochemical 



790 



Ether, the 874 

 Experiments with telephone 



867 



-, thermoelectric 698 

 Extra currents 834 



Faraday effect 887 



, theory 889 



Faraday's law of electrolysis 



791 

 Faults, location in conductors 



709 

 Ferro-magnetic substances not 



alloys of iron 624 

 Field, magnetic 601 

 Fields, magnetic 611 

 Figures, electric 893 

 -, electrolytic 811 

 -, Guebhard's 811 

 -, magnetic 599 

 Flame, conductivity 896 

 -, ionisation by 896 

 -, resistance 687 

 Force, magnetic 610 

 Forms of alternators 759 



dynamos 766 



- electromagnets 747 



telegraphs 855 



telephones 868 



Frictional electricity 562 



- electrostatic machines 741 

 Furnaces, electric 782 



Galvanometers 728 

 -, ballistic 729 

 -, mirror 731 

 -, tangent 733 

 Gas batteries 640 



- cells 656 



Gaseous ions, physical pro- 

 perties 899 



Gases, conduction in 685 



-, hot, resistance 687 



-, ionisation 895 



-, ionised, theory of con- 

 duction through 689 



-, passage of electricity 

 through 898 



-, properties in conducting 

 state 686 



-, rarefied, discharge in 685, 

 914 



-, ratio of charge to mass 

 688 



Glow discharge 900 



Gramme machine 767 



Grove cells 643 



Guebhard's figures 811 



Hall effect 846 



Heat due to magnetisation 



620 



Heating effect of current 705 

 -, electric 783 

 Helmholtz's potential law 



828 



Hertz's experiments 876 

 High frequency currents 850 

 History of primary cells 647 

 Holtz machine 744 

 Hydrodynamic analogies 820 

 Hysteresis, dielectric 584 

 -, magnetic 607 



Hysteresis, magnetic, energy 



losses 618 

 -, -, measurement 617 



Ignition by spark 904 

 Incandescent bodies, ionisa- 

 tion by 896 



- lamps, electric 780 



- lighting, electric 782 

 Induced currents 835 



- magnetism 605 

 Induction and capacity, effects 



on currents 843 



- coefficients 840 



, measurement 840 



- coils 750 



-, effect on electric flow 844 



-, electric 574 



-, -, theory 576 



-, electrodynamic 822 



- electrostatic machines 742 

 -, magnetic, measurement 



612 



-, -, theory 604 

 -, measurement 841 

 -, mutual 834 



- spark 905 



- telegraph 856 



- in telegraphy 857 

 - telephones 869 



-, unipolar 831 

 Instruments and apparatus, 

 electrical 711 



- for magnetic testing 608 

 -, registering 735 

 Insulation resistance, deter- 

 mination 708 



Insulators 580 



-, determination of resistance 



709 

 Interference of electromagnetic 



waves 877 

 Internal resistance of cells, 



measurement 666 

 - primary cells 647 

 Interrupters 755 

 -, mercury 756 

 Ion, charge carried by 685 

 Ionisation by chemical action 



895 



electric discharge 895 



flame 896 



- of gases 895 



- by incandescent bodies 



896 



radioactive bodies 897 



Eontgen rays, cathode 



rays, etc. 897 



- splashing of drops, etc. 

 898 



ultra-violet light 898 



Ions, gaseous, physical pro- 

 perties 899 



, migration 809 



-, velocity 810 



Iron alloys, magnetic pro- 

 perties 624 



III 



