Schedule of Classification 



PAGE 



lonisation by Radioactive 



Bodies. (See also 4275.) 897 

 lonisation by Rontgen 

 Rays, Cathode Rays, 



etc 897-898 



Rontgen Rays ... 897-898 



lonisation by Splashing of 



Drops, etc 898 



lonisation by Ultra-violet 



Light 898 



Passage of Electricity 



through Gases ... 898 

 Physical Properties of Ga- 

 seous Ions 899 



6810 Convective Loss. Points. 



Leakage 899-902 



Convective Loss ... 899-900 



Glow Discharge (or Silent 



Discharge] 900 



Leakage 900-901 



Points 901-902 



Brush Discharge ... 901 

 Discharge from Points... 901 

 6820 Disruptive Discharge. The 

 Electric Spark. Oscil- 

 latory Discharge. (See 

 also 5220. For Lightning, 

 see 5270.) ... 902-911 



Disruptive Discharge 902-903 

 Electric Spark ... 903-908 



Ignition by Spark 904-905 



Induction Spark ... 905 

 Potential ... 906-907 



Sparking Distance ... 907 

 Oscillatory Discharge 908-911 

 Electric Oscillations ... 908 

 Ley den Jar Discharge 909-910 

 Nebenstrome (Induced 

 Currents Produced 

 by Discharge of Con- 

 densers}. (See also 

 6440.) 910 



6825 



6830 



6840 



6845 



6850 



Battery 

 Mechanical Action 



Leyden 



910 



of the 

 Discharge (Disintegration 



911-912 



also 



of Metals, etc.) 

 The Voltaic Arc. (Se 



6080.) 912-914 



Alternating Current Arc... 912 

 Electromotive Force ... 913 

 Counter E.M.F. ... 913 



Discharge in Rarefied Gases. 



(See also 4240.)... 914-921 



Air 915 



Luminous Phenomena ... 916 

 Magnetism, Action 916-917 



Potential Gradient ... 917 

 Stratification .. ... 918 

 Vacua (so-called) .. 918-919 



Conductivity .. 918-919 



Vacuum Tubes .. 919-921 



Grooves' s Tubes.. ... 920 

 Cathode, Becquerel and other 

 Projected Discharges 

 (Velocity, Charge, Effect 

 of Magnetism, etc.). (See 

 also 4240.) ... 921-925 



Becquerel Rays ... 921-922 



Cathode Rays ... 922-924 



Deflection 923 



Cathode and Rontgen 



Rays 924-925 



Photoelectric Action 925-928 



A ction of Light on Selenium. 

 (^orEftect on Resistance 



see 5660.) 925 



Pliotoelectric Cells ... 925 



Photoelectric Discharge 



(and Charge} 926-928 

 Rontgen Rays, Effect 926-927 

 Ultra-violet Light, Effect 927-928 

 Various Influences on Dis- 

 charge 928 



