Electric discharge with the chloride of silver battery. 241 
Spottiswoode . . 
Sprengel 
Stokes 
Stratification, first observation of 
„ spiral . . 
„ „ motion of 
“Streamer” discharge in vacnum-tube 
PAGE. 
. . 156, 163, 199, 206, 209, 221, 223 
158, 171 
207, 218, 232 
155 
180, 43; 183, 62; 185, 73; 193, 429; 195, 443 
183, 60; 184, 62; 195, 443 
186, 80; 189, 98; 199, 469 
Sulphur in vulcanized rubber dissolved by hydrogen and deposited in an allotropic condition 
on the walls of tube . . . . . . . . . . . . . . . . . . . . 196 
Tell-tale tube . . .. .. .. .. .. .. .. .. .. .. .. 161 
Temperature, effect of, on discharge . . . . . . . . . . . . . . 177, 28, and note 
Tkoost . . . . . . . . . * . . . . . . . . . - . . . . 222 
Vacuum-tubes, histories of, with residual air . . . . . . . . 187-188, 191, 196-197, 207 
„ „ „ carbonic acid . . 159, 164, 168-169, 205-206, 210-211, 
213-214, 216 
„ „ „ carbonic acid and bromine . . . . . . . . 212 
„ „ „ coal gas . . . . . . . . . . 225, 226 
„ „ ,, cyanogen . . . . . . . . 156-157, 204, 212 
„ „ „ ethylene . . . . . . . . . . . . 211 
„ „ „ hydrogen 171-187, 189-191, 191-195, 195-196, 197-199, 
206, 208-210, 214-216, 217, 219-222 
,, ,, nitrogen . . . . . . . . 157, 200, 205, 207 
„ „ nitrogen and bromine . . . . . . 203, 204 
„ „ sulphuretted hydrogen . . . . . . . . 202 
„ „ hydrogen and sulphuretted hydrogen . . . . 202 
„ „ sulphurous acid . . . . . . . . . . 212 
experiments with hydrochloric, hydrobromic, and hydrofluosilicic acids, 
carbonic oxide, olefiant gas, arsenetted hydrogen, and dioxide of nitrogen 222 
170, 183, 201, 221 
Varley 
“Virgin” tubes 
Wiedemann . . 
156 
236 
2 I 
mdccclxxvih. 
