Index 



Metals, specific resistance 673 

 -, thermoelectricity 701 

 Microphones 869 

 - and telephones 870 

 Migration of the ions 809 

 Minerals, pyro-electricity 587 

 Mines, safety electric lamps 



for 782 

 Minimum electromotive force 



of electrolysis 796 

 Mirror galvanometers 731 

 Mixed electrolytes 796 

 Motive power, electricity as 

 774 



, electromagnetism as 775 



Motors 771 



alternating current 771 



asynchronous 771 



continuous current 773 



efficiency 774 



electromagnetic 774 



polyphase 772 



revolving field 772 



synchronous 773 

 Moving media 554 

 Multiple telegraphy 860 

 Multiplex telegraphy 859 

 Mutual action of currents 

 826 



and magnets 829 



magnets 603 



- induction 834 

 coefficients 840 



Natural magnets 597 



Nebenstrome 910 



Networks of linear conductors 



662 

 Neumann's theory of mutual 



action of currents 828 

 Nickel, magnetic properties 



614 



-, specific resistance 675 

 Nobili's rings 811 



Orsted's experiments 831 



Ohm, the 669 



-, absolute determination of 



the 670 



Ohm's law 659 

 Opposite currents in same 



wire 630 



Oscillations, electric 908 

 Oscillatory discharge 908 

 Osmose, electrical 812 

 Oxygen, magnetic properties 



614 



Passage of electricity through 



gases 898 

 Passivity 802 



- of iron 802 

 Peltier effect 704 



Perkin's determinations of 



magnetic rotation 891 

 Permanent magnets 596 

 Permeability, magnetic 613 



Phenomena of primary cells 



647 



-, thermoelectric 698 

 Photoelectric action 925 



- cells 925 



- discharge (and charge) 925- 

 Photographic plates, figures 



on 894 



- telegraphy 860 



Physical properties of gaseous 

 ions 899 



- theories of magnetism 627 

 Physiological electricity 710 

 Piezo-electricity 586 



Plane of polarisation, rotation 

 by magnetism 887 



, - thin metallic films 



890 



Plante cells 657 



Plate machines 742 



Plates of secondary cells 658 



Points, discharge from 901 



Polarisation capacity 798 



- cells 798 



- currents 798 



- of dielectrics 578 

 -, electrolytic 797 

 -, -, of metals 800 



-, -, - various substances 801 



- electromotive force 800 

 of primary cells 647 

 Polarised light, magnetic 



action 887 



, reflection from magnetic 



pole 889 



Polarity, diamagnetic 625 



Poles, magnetic 597 



Polyphase currents, measure- 

 ment 696 



in wires 849 



- motors 772 

 Potential difference 576 



- differences, voltaic 791 

 -, electric 568 



- gradient in discharge in 



rarefied gases 917 



- law of Helmholtz 828 



- of spark 689, 906 

 Power of dynamos 769 

 Poynting's theory of electro- 

 dynamics 824 



Primary cells, bichromate 635 

 carbon-consuming 635 

 chemical theory 652 

 chronological list 633 

 constant 636 

 construction 634 

 contact theory 653 

 copper oxide 637 

 currents from 644 

 dry 638 



electromotive force 645 

 experiments 639 

 gas batteries 640 

 history 647 



internal resistance 647 

 Leclanche 640 



Primary cells, 2-liquid 641 

 -, Bunsen 641 



- - -, Daniell 642 



- - -, Grove 643 



phenomena 647 



polarisation 647 



- - theory 649 



- - of electromotive force 



650 



- -, uses 648 

 Printing telegraph 856 

 Production of currents by 



magnets 837 



Propagation of electromagnetic 

 waves 878 



Properties of electrolytic de- 

 posits 810 



-, magnetic, of various sub- 

 stances 613 



Pyro-electricity 586 



- of minerals 587 



Quadrant electrometers 722 

 Quadruplex telegraphy 859 



Eadiation in magnetic field 

 (Zeeman effect) 891 



Eadiations, electromagnetic 

 883 



Eadioactive bodies, ionisation 

 by 897 



Railways, applications of elec- 

 tricity to 713 



-, electric traction for 714 



Rarefied gases, discharge in 

 685, 914 



Ratio () 558 



Reaction of armatures 763 



Receivers, telephone 871 



Recorders, telegraphic 861 



Reflection of polarised light 

 from magnetic pole 

 889 



Refraction, double, due to 

 electro- and magneto- 

 striction 887 



Registering instruments 735 



Regulators for currents 740 



Relations between elastic and 

 magnetic properties 619 



thermal and magnetic pro- 

 perties 619 



Relays 740 



-, telegraphic 861 



Repulsion, electric 565 



- of metal ring by alternating 



currents 839 

 Residual charge of condensers 



573 



Resistance 661 

 -, apparatus for measuring 



663 



- coils, standard 669 



- of electric arc 686 

 flames 687 



- - hot gases 687 



- and light, relations 677 



