
DISRUPTIVE DISCHARGE OF ELECTRICITY. 645 
only is slightly out. These results confirm the conclusion that we inferred 
from our preliminary experiments of the summer of 1876, that the curve is to 
a first approximation a parabola. 
In conclusion, our thanks are due to the Professor of Natural Philosophy 
for bearing the expense of what was new in the arrangement, and to the Pro- 
fessor of Chemistry for the loan of apparatus for the preparation of the 
gases. 
TaB_E I.—Induction Curve, 29th May 1877. Electrodes, balls. 
160 mm. Length of Spark, 6 centimetres. 
Pressure, 
KEqu. I. V =4522-67-*— 20:24. Equ. Il. V=2903'57-* + 58:073 —°318077. 














Distance be- Caleulated Calculatec 
tween Centres Deflection. Zero. Dee a aaa of ce of | D fference of 
of a nN. ni Potential. Potential. oeential ee 1 
Centimetres. ae ice Vv. vr 
230 A484 254. 
14:5 | 230 x 254. \ 2501 291°66 25370 
231 a 253 
248 a 236 ) 
5:5 | 240 “ 244 238 271-54 240°47 
250 i 938 |f 
254. 4 230 
16°5 | 254 mi 230 \ 229°3 25oroo WP 22879 
256 as 228 
270 ye 214 | 
1g | 265 e 219 x \ 219 23819 | 21842 
265 Fe 219 
280 Fe 204 ) | 
18°5 | 270 2 DNAS Wea 29422) 20914. 
267 217 |S | 
275 f 209 
095 | 280 204 x | 204 211-69 200°77 
280 i 204 
f| 290 i l94x |) 
20°5 285 te 199 194 200°37 193°19 
Ul a84 é 200 J 
297 x 187 x | 
PAGS) | 293 fe com \ 187 190711 | 186-28 
297 * 187 
306 ss 178 ) 
22°5 i 306 * 178 178 180°76 179°96 
307 : 177 (|S 
310 ui 174 
23°5 i 314 BA 170 \ 72 Iva. 17415 
313 is 171 
318 3 166 
24°5 i 325 2 159 \ 161°3 164°36 
325 = 159 




VOL. XXVIII. PART II. 
