i88 



INDEX 



Bremen, 56. 



Bremen lamp, candle power of, 139. 



Brilliancy of crater, 132. 



Bron, Guye and, 115. 



Burgess, Waidner and, 43, 173. 



Cody and Arnold, 64, 145. 



Cody and Vinal, 65. 



Calcium fluoride in flaming arc, 56. 



Calcium oxide at cathode, 82. 



Candle power: 



of direct-current carbon arc, 128. 



and area of crater visible, 129. 



as affected by length of arc, cur- 

 rent, etc., 130. 



of flaming arcs, 133. 



of mercury arc, 134. 



of alternating-current arcs, 135. 



comparison of, 139. 

 Carbon arc in air: 



characteristic curves for, 9. 



E.M.F. required, 16. 



potential in different parts of, 22. 



cathode drop in, 22. 



anode drop in, 24. 



electric force in, 24. 



counter E.M.F. of, 25. 



temperature of, 40. 



with alternating currents, 105. 



candle power of, 128. 

 Carbon arc in vacuum: 



appearance of, 75. 



voltage with different pressures, 78. 



anode and cathode drops in, 78. 



voltage with different lengths, 79. 



temperature of, 81. 



with alternating currents, 117. 

 Carbon electrodes: 



manufacture of, 8. 



Carbon electrodes: 

 solid, 8. 

 cored, 9. 

 diameter of, and candle power, 



137- 



Carbon dioxide, arc in, 85. 

 Carbon monoxide, arc in, 85. 

 Carbone lamp, 133. 

 Cassdmann, 55. 

 Cassuto, Stark attd, 163. 

 Cathode: 



definition of, 4. 



area of, 49. 



ionization at, 161, 165. 



must be hot, 162. 



temperature of, 165. 



effect produced by heating, 185. 

 Cathode drop: 



definition of, 22. 



in carbon arc in air, 22. 



in flaming arc, 60. 



with copper electrodes, 65. 



with graphite electrodes, 66. 



with unlike electrodes, 72. 



in a vacuum, 78. 



in mercury arc, 96. 



in alternating arc, 112. 



theory of, 166. 



variations in, 180. 

 Characteristic curves: 



definition of, 12. 



for arcs between solid carbons, 13. 



for arcs between cored carbons, 14. 



statical, 16. 



dynamical, 16, no, 151. 



for enclosed arc, 50. 



for flaming arc, 58. 



for arc between metals, 62. 



for magnetite arc, 67. 



for iron-titanium arc, 69. 



for mercury arc, 93. 



