Schedule of Classification 



Electrodynamics, Special Phenomena. 



6400 General 818-820 



Electricity and Magnetism 818 

 6410 Theories of Electrodynamics. 



(See also 4940. ) . . . 820-824 



Analogies 820-821 



Hydrodynamic A nal- 



ogies 820-821 



Edlund's Ether Theory ... 821 



Equations 821-822 



Maxwell's Equations ... 822 



Induction 822-823 



Laws 823 



Maxwell's Theory ... 823-824 



Pointing's Theory 824 



6420 Mutual Actions of Steady 

 Currents, and of Cur- 

 rents and Magnets 824-831 

 Electromagnetic Rotations 825-826 

 Mutual Action of Cur- 

 rents 826-829 



Ampere's Apparatus 826-827 

 Ampere's Experiments ... 827 

 Ampere's Formula ... 827 



Ampere's Law 827 



Ampere's Theory ... 827 

 Clausius's Law... 827-828 



Helmholtz's Potential 



Law 828 



Neumann's Theory ... 828 

 Riemann's Theory ... 828 

 Weber's Law ._.. 828-829 



Mutual Action of Currents 



and Magnets... 829-831 



Action of Currents on 



Magnets ... 829-830 



Action of Magnets on 



Currents ... 830-831 



Oersted's Experiments ... 831 

 Unipolar Induction ... 831 

 6430 Special Dynamical Theories 



of Electric Currents 831-832 



6435 Electric Convection. Row- 

 land Effect ... 832-833 

 Electric Convection 832-833 



Rowland Efi'ect 833 



6440 Self-Induction and Mutual 

 Induction. Eddy Cur- 

 rents. Coefficients of In- 

 duction. Measurement 

 of Induction ... 833-842 



Self-induction. (See also 



6450.) ... 833-834 



Extra Currents. (For 

 Nebenstrome see 5220, 



6820.) 834 



Measurement of Self- 

 induction 834 



Mutual Induction 834-838 



Induced Currents 835-836 



PAGE 



Production of Currents B"" 



by Magnets ... 837-838 

 Eddy Currents ... 838-840 

 " Magnetism by Rota- 

 tion" or Currents In- 

 duced by Rotation ... 839 

 Repulsion of Metal Ring 

 by Alternating Cur- 

 rents ... 839-840 

 Coefficients of Induction 840-841 

 Measurement of Coeffi- 

 cients of Induction 840 

 Mutual Induction Co- 

 efficients 840 



Self-induction Coeffi- 

 cients ... 840-841 

 Measurement of Self- 

 induction Coeffi- 

 cients 841 



Measurement of Induc- 

 tion 841-842 



6450 Effects of Induction and Ca- 

 pacity on Electric Flow 842-846 



Capacity 842-843 



Capacity and Self-in- 

 duction ... ... 842 



Circuits 842-843 



Condensers 843 



Currents 843-844 



Alternating Currents 843-844 



Induction 844-845 



Self-induction. (See also 



6440.) 845 



6455 Effects of a Magnetic Field on 



Electric Flow. Hall Effect 846-847 

 Hall Effect ... 846-847 



6460 Alternating and Polyphase 

 Currents in Wires. (See 

 also 5705.) ... 847-850 



Alternating Currents 847-849 

 Polyphase Currents ... 849 

 Rotating Magnetic Fields 849 

 6470 Currents of High Frequency 850 

 6480 Telegraphy. (For Wireless 



Telegraphy see 6615.) 850-865 



Cables. (See also 6450.) 852-854 



Submarine Cables 852-853 



Conductivity of tlie Earth 854 



Diplex Telegraphy 854-855 



Effect of Various Agents... 855 



Forms of Telegraphs 855-857 



Induction Telegraph ... 856 



Printing Telegraph 856-857 



Writing Telegraph ... 857 



Induction 857-858 



Messages in the Same Wire 

 in Opposite Directions. 

 (See also 5600, Opposite 

 Currents, Co-existence 

 in Same Wire.) 858-860 



Duplex Telegraphy 858-859 



