Index 



Thermoelectromotive force 702 



Thermopiles 703 



Thin metallic films, rotation 

 of plane of polarisation 

 by 890 



Thomson effect 704 



Torsion, magnetic 617, 623 



Tramways, electric traction for 

 715 



Transfer of energy 555 



Transformation of alternating 

 into continuous currents 

 760 



Transformers 752 



-, distribution by 753 



-, losses in 754 



Transient currents, measure- 

 ment 696 



Transmission of energy over 

 long distances 717 



Transmitters, telephone 873 



Transparent media in electro- 

 magnetic theory of light 

 885 



Transport numbers of ions 810 



Ultra-violet light, effect on dis- 

 charge 927 

 , ionisation by 898 



Unipolar induction 831 



Units, electric 557 



-, - and magnetic 555 



-, , dimensions 556 



-, electrostatic and electro- 

 magnetic 558 

 -, magnetic 559 

 Universality of magnetism 611 



Vacuum, so-called 918 

 -, -, resistance 685 



- tubes, discharge in 919 

 Variable currents, apparatus 



for measuring 738 

 Velocity of electricity 631 

 electromagnetic waves 878 



ions 810 



Vibrators, electromagnetic 881 

 Viscosity of dielectrics 585 



- and electrolytic conduc- 



tivity, relations 808 

 Volta's contact force, modern 

 views 796 



- fundamental experiment 



654 

 Voltaic arc 912 



- potential differences 791 



- and static electricity 632 



Voltameters 736 

 Voltmeters 737 

 Volume change by magnetisa- 

 tion 624 



Water, electrolysis of 787 

 -, electrolytic conductivity 807 

 Wattmeters 737 

 Waves, electromagnetic 875 

 Weber's law of mutual action 



of currents 828 

 Wehnelt interrupter 756 

 Welding, electric 783 

 Weston cell, electromotive 



force 692 



Wheatstone's bridge 661, 663 

 Wimshurst machine 745 

 Wireless telegraph apparatus 



757 



- telegraphy 881 



- telephony 883 



Wires, electromagnetic waves 



in 880 



-, specific resistance 675 

 Writing telegraph 857 



Zamboni pile 638 

 Zeeman effect 891 



CAMBRIDGE: FEINTED BY JOHN CLAY, M.A. AT THE UNIVERSITY PRESS. 



