Schedule of Classification 



PAGE 



Quadruplet Telegraphy 859 

 Multiplex Telegraphy 859-860 

 Multiple Telegraphy ... 860 

 Photographic Telegraphy 



(Telephotography) ... 860 



Recorders 861 



Relays. (See also 6020. ) . . . 861 

 Simultaneous Telegraphy 



and Telephony 862 



Submarine Telegraphy ... 862 



Telegraph Lines ... 862-864 



Subterranean Lines ... 864 



6485 Telephony 865-873 



Applications of Telephone 866 

 Calling -up Apparatus ... 866 

 Experiments ... 867-868 



Forms of Telephones 868-869 



Induction 869 



Long Distance Telephony 869 

 Microphones ... 869-870 

 Microphones and Tele- 

 phones 870-871 



Receivers ... ... ... 871 



Simultaneous Telegraphy 



and Telephony 871 



Telephone Lines ... 872-873 



Theory 873 



Transmitters 873 



6490 Energy in Special Electro- 

 dynamic Phenomena ... 873 



Electromagnetic Waves. General 

 Electromagnetic Theory of Light. 



6600 General 873-875 



The Ether 874 



6610 Production and Properties 

 of Electromagnetic 



Waves. (See also 6620.) 875-881 

 Electromagnetic Waves 875-880 

 Hertz's Experiments 876-877 



Interference 877 



Propagation 878 



Velocity 878 



Standing (or Stationary) 



Waves 879 



Waves in Wires ... 880 



Resonance 880-881 



Resonators ... ... 881 



Vibrators ... ... ... 881 



6615 Wireless Telegraphy and 



Telephony ... 881-883 

 Wireless Telegraphy 881-883 

 Marconi's System ... 882 

 Wireless Telephony ... 883 

 6620 General Theory of Electro- 

 magnetic Radiations. 

 (See also 6610.)... 883-885 

 Electromagnetic Radia- 

 tions 883 



Electromagnetic Theory of 



Light ' 883-884 



PAOE 



Maxwell's Theory ... -884 

 Light and Electricity, Rela- 

 tions 884 



6625 Transparent Media in the 

 Electromagnetic Theory of 

 Light ... ... 885-886 



6627 Metallic Media in the Electro- 

 magnetic Theory of Light 886 



6630 Aberration and Moving 



Media. (See also 3420.)... 886 



Influence of Electric and Magnetic 

 Fields on Light. 



6635 General 886-887 



6640 Double Refraction due to 

 Electro- and Magneto- 

 striction 887 



Electric Double Refraction 887 

 6650 Magnetic Action on Polarised 

 Light. (See also 4040; 

 and Chemistry, 7285.) 887-890 

 Faraday Effect (Magnetic 

 Rotation of Plane of 

 Polarisation) 887-889 



Theory ... 889 



Kerr Effect (Reflection from 



Magnetic Pole) . . . 889-890 



Kundt Effect (Rotation of 

 Plane of Polarisation by 

 thin Metallic Films) ... 890 

 6655 Magnetic Rotation of Special 

 Substances. (See also 

 4050 ; and Chemistry, 



7285.) 890-891 



Perkin's Determinations . . . 891 

 6660 Influence of Magnetism on 

 the Emission and Ab- 

 sorption of Light. (See 

 also 4208.) ... 891-892 



Zeeman Effect (Radiation 



in Magnetic Field) 891-892 



Electric Discharge. 



6800 General 892-895 



Discharge in Various Media 893 



Electric Figures ... 893-894 



Lichtenberg's Figures 893-894 

 Photographic Plates, 



Figures 071 894 



Electric Shadows 894 



6805 lonisation of Gases. (See also 



5685.) 895-899 



lonisation by Chemical 



Action 895 



lonisation by Electric Dis- 

 charge 895-896 



lonisation by Flame . . . 896 

 Conductivity of Flame 896 



lonisation by Incandescent 



Bodies . 896-897 



