DISRUPTIVE DISCHARGE OF ELECTRICITY. 657 
TasLtE XIII—Air Distance Curve, discs having first been heated, 13th July 
1877. Dielectric, Air. Electrodes, large discs. Pressure, 742 mm. Tem- 
perature, 70° Fahr. 
Equation, V =89°240s—33°815s". 


Mean Diff. Calculated 










gen of Observed | Mean | ofPotential | Diff of | - 
Spark in Deflection. Acre: Diff. of Diff. of eT t Pot ih jin Difference. 
Be cemctres. ue m. | Potential. | potential “mest ener Ve 
508 512 4x |) ! 
035 | 3 ae Seay Te 2:06 308.1). 109 
me 500 . 10 
06 4 a eb te 10 515 5-23 —0-08 
: if 495°5 2) 14:5 ) a= AN : 42 
085 | rae é ia5 |y 148 7A 7-34. +013 
489 e 21 ' , , 
u | va ? ai \ 21 10°82 941 | 41-41 
fj 488 509 26 x 
16 482 507 25 26 13:39 13-41 —0-02 
(| 482 : 25 
‘ 470 506 36. 
21 | os , 36 fy 36 18°54. 17-25 41:29 
459 ; A ie 94: 
3] | ie : 4g |p 475 24-46 24-44 +.0:05 
a. 448 » p81 ; 
af ae ig outa 30:90 30:90 0-00 
i 439 5 OO. aval ’ 
| 51 it we 69 ly 69 35:54 36-71 —117 
; 428 fe Sinan ; 
61 | io S si ly 8 41°72 41-86 —0-14 
{| #21 \ 88 |) 
jak 419 a 90 88:7 45°69 46°31 — 0-62 
( nc 421 es 88 if 
ne 412 ci 97 Nava . ; 
81 | scar : ae [ees 50-48 50-10 +.0°38 
405 ‘ 104 
91 ne 404. i“ 105 fms 53-21 53-21 0-00 
¢ 408 ‘ 101 
{| 2404 ‘ 105 
1-01 €403 106 106°3 54-75 55:38 —0°63 
l c402 510 | 108 
Pen | 6400 B12 pi 12n eg a... 
| ne 402 : tio |p 22 5717 57-40 0-23 
393 119 | 
1-21 396 511 | 115x | $1135 58:46 58-40 +006 
¢ 400 512 | 112x 
394 ; 118 |) 
1:31 e401 509 | 108 113-7 5856 58:86 —0°30 
ne 397 . isan | 
396 508 | 112 
1-41 396 . 112 hints 57°69 5861 — 0-92 
e397 ‘ 111 

VOL. XXVIII. PART II. 8H 

