ELECTRIC DISCHARGE WITH THE CHLORIDE OF SILVER BATTERY. 239 
INDEX TO PART II. 
\_The Figures printed in Italics refer to the Experiments.'] 
PAGE. 
Abria . . . . . . . . . . . . . . . . . . . . 155 
Absorption of gas by terminals . . . , . . . . . . . . . . . . 222, 228, 229 
“ Absorption-vacua ” .. .. .. .. .. .. 215, 2i 1 ; 21 6,222 ; 21 7,223 
Alvergniat . . . . . . . . 157, 158, 171 
Axial impulse from positive . . . . . . . . . . . . . . . . 221, 227 
Becquerel . . . . . . . . . . . . . . . . . . 235 
Blocks of light 180, 42; 206, 197 
Change in colour of strata .. 181, 44; 183, 58, 59, 60, 61; 190, 103, 104, 105, 107 ; 191, 109 ; 
193, 132; 195, 147; 200, 171 ; 215, 214 
Changes in vacuum-tubes after passage of a current . . . . . . . . . . . . 156 
Clerk Maxwell . . . . . . . . . . . . . . . . . . . . . . 229 
Condensers, use of, with vacuum-tubes .. .. 184,52; 201, 177, 179 ; 202, 184; 203, 185; 
204, 190, 191, 192; 205, 194-197; 206, 198; 212, 208 ; 224, 230 
Conductors introduced between terminals of a tube, effect of . . . . 213, 209, 210, and note 
Conductors — Rarefied gases are not conductors . . . . . . . . . . . . . . 168 
Constancy of difference of potential between the terminals of a given vacuum-tube when the 
current is varied .. .. .. .. .. .. .. .. .. ..168-171 
Dark space near negative terminal . . . . . . . . . . . . . . . . . . 155 note 
„ „ ,, , absence of .. .. .. .. .. 157; 173,5; 178,54 
De la Rive 165, 174, 184, 188, 191 note, 221, 236 
Deposit marking intervals between strata .. .. .. .. .. .. .. 199, 170, 171 
Diameter of tube, effect of on strata . . . . . . . . 207, 200 ; 208, 201 ; 209, 202 
Disruptive nature of the discharge in vacuum-tubes . . . . . . . . . . . . 171 
Du Moncel . . . . . . . . . . . . . . . . . . . . . . . . 177 note 
Electrometer — method of measurement with . . . . . . . . . . . . 165, 166 
Emanation of gas from terminals . . . . . . . . . . . . . . . . 222, 228, 229 
„ „ walls of tube .. 178 ,31; 188,55; 189, 102; 193, 126; 194, 139; 
197, 157; 215, 211 
Erratum . . . . . . . . „ , . . . . . . . . . . . . . . 233 
Exhaustion of vacuum-tubes, method employed for . . . . . . . . . . . . 158 
„ degree of, produced by water-trompe . . . . . . . . . . . . 158 
,, „ „ SpRENGEL-pump . . . . . . . . . . . . 159 
Gassiot 
Gaugain 
Geissler 
Graham 
Grove . . 
Hauteeeuille 
absorp 
155, 156, 157 
on of hydrogen by spongy palladium . . 215, 211 
160, 177, 180, 186, 188, 190, 199, 200, 206, 210, 211, 237 
213 
156, 200, 223 
. . . . . . . . • . . . . . 222 note 
155, 235 
222 
