INDEX 



Electrodes: 



light from, 129. 



discharge of ions to, 170. 



See also Metal electrodes, Oxides, 

 Magnetite, Electrolyte, and Un- 

 like. 

 Electrolytes: 



arc between, 69. 



arc not like, 179. 

 Electrons: 



definition of, 156. 



coming from within metal, 163. 

 E.M.F.: 



counter, 10, 25. 



required for arc, 16 



" forward," 33. 



residual, 35. 

 Enclosed arc: 



description of, 49. 



characteristic curves for, 50. 



candle power of, 137, 139. 

 Exploring electrodes, 22. 



Feige, Urbain, Seal and, 103. 



Fery, 43, 93- 



Festing, Abey and, 43. 



Firth, 31. 



Firth and Rogers, 22, 32. 



Fitzgerald, Wilson and, 45, 73. 



Flaming arc: 



appearance of, 54. 



history of, 55. 



composition of electrodes with, 56. 



advantages of, 57. 



characteristic curves for, 58. 



anode and cathode drops in, 60. 



with alternating currents, 109. 



photometry of, 132. 



candle power of, 133. 

 Fleming, 23. 



Fleming and Petavel, 127, 137. 

 Foley, 143. 



" Forward," E.M.F., 33, 

 Freedman, 63. 



Gas between electrodes: 



temperature of, 40. 



ionization of, 171. 

 Gases, arc in various, 83, 119. 

 Gehrke and Baeyer, 103. 

 General Electric Company: 



mercury vapor lamp, 90. 



mercury arc rectifier, 122. 

 Georges, 136. 

 Glow discharge, 2. 

 Gould, 118. 

 Granqvist, 37, 49, 114. 

 Grau and Russ, 63, 85. 

 Gray, Wilson and, 41. 

 Grove, 69. 



Gnye and Bron, 115. 

 Guye and Monash, 115. 

 Guye and Zebrikojf, 63. 



H 



Hagenbach and Veillon, 64. 



Hall effect in mercury arc, 102, 178. 



Heinke, 34. 



Hertzfeld, 137. 



Heubach, 106, 113. 



Hewitt, see Cooper Hewitt. 



Hissing arc: 



voltage of, 21. 



cause for, 21. 



with metals, 65. 

 History of arc, 5. 

 Hittorf, 165. 

 Hoerburger, 79. 

 H art on, 160. 

 Hotchkiss, 38. 



