INDEX 



(The numbers refer to pages.) 



Abey and Festing, 43. 

 Alternating-current arc : 



with carbon electrodes, 105. 



characteristic curves for, 106. 



current and potential difference 

 for different phases of, 107. 



oscillographs for, 109. 



dynamical characteristic curves 

 for, no. 



anode and cathode drops in, 112. 



phase difference in, 113. 



between metals, 114. 



in a vacuum, 117. 



between unlike terminals, 118. 



in other gases than air, 119. 



candle power of, 135. 



photometry of, -135. 

 Amalgams, arc between, 102. 

 Andrews, 48. 

 Anode: 



definition of, 4. 



temperature of, 40, 165. 



ionization at, 162, 168. 



effect produced by heating, 185. 



See also Electrodes and Crater. 

 Anode drop: 



definition of, 22. 



in carbon arc in air, 24. 



in flaming arc, 60. 



with copper electrodes, 65. 



with graphite electrodes, 66. 



with metal electrodes, 66. 



with unlike electrodes, 72. 



Anode drop: 



in a vacuum, 78. 



in mercury arc, 97. 



in alternating-current arc, 112. 



theory of, 168. 



variations in, 183. 

 Appearance of arc: 



carbon arc in air, 3. 



flaming arc, 54. 



magnetite arc, 67. 



arc in a vacuum, 75. 



mercury arc, 88. 



alternating-current arc, 105. 

 Arnold, Cody and, 64, 145. 

 Arons, 30, 37, 71, 82, 87, 92, 96, 103, 



114, 116, 164. 

 Austin, 153. 

 Ayrton, 31, 131. 

 Ayrlon, Mrs., 10, 21, 24, 48, 130. 



B 



Back E.M.F., see Counter E.M.F. 

 Baeyer, Gehrke and, 103. 

 Baldwin, Miss, 143. 

 Banderet, 66. 

 Becknell, 38. 

 Becquerel, 41. 

 Bedell, 124. 

 Blondel, 16, 37, 50, 119, 130, 132, 



139, 170, 180. 



Blondel lamp, candle power of, 139. 

 Boston flaming arc, candle power of, 



140. 

 Braun, 147. 



187 



