654 ALEXANDER MACFARLANE ON THE 
TABLE X.—Distance Curve, 6th June 1877. Electrodes, large discs. 
Pressure, 180 mm. 
Equation, V = (19°724—3-0666s) ,/ {s’+ 45s}. 

Length of | Gucered Mean Diff. Caleulated 
Spark in Deflection. Zero, Diff. of pee ott ses = P nae Difference. 
Centimetres. N. mm. Potential. Petautiall RN ee ahs ances Vi-V. 
Ss. nv —nN. wel Ve 
ATS 498 20 
15 | 478 Pe 20 \ 20 5°79 5°78 +0°01 
478 55 20 
470 ¥ 28 x 
25 | 469 = 29 \ 28 8-11 7:93 +018 
470 - 28 
463 ays 35 
35 | 463 \, 35 \ 10:13 9:87 +0°26 
463 3 35 
457 s 41 
“45 | 458 is 40 | a 11:58 11°67 —0:09 
459 ; 39 
( 453 49 45 \ 
55 | 452 s AG 45 13:03 13°38 — 0°35 
l 454 s 44 
(| 447 ; 51 3 
“6D. 448 5 50 49-7 14:39 14:99 — 0°60 
l 456 , 48 
444 Fs 54 
‘75 | 444 - 54 \ oes 15°72 16°53 — 0°81 
4438 a 55 
438 53 60 
85 | 456 3 62 | ors 17°75 17:99 — 0°24 
436 , 62 
430 > 68 
95 | 430 ss 68 ho 19-40 19°39 +0:01 
433 es 65 
427 o 71 
1:05 | 426 53 72 hn 20°56 20°71 —O015 
428 . 70 
423 2 i 
115 | 422 if 76 hrs 21°92 21:97 —0-05 
422 A 76 
419 : 79 
1:25 ' 417 i 81 \ 23°16 23°16 0:00 
418 aS 80 
413 P 85 
1:35 | 413 i 85 \ 85:3 24-69 24-29 4+.0-40 
412 86 
408 : 90 1) 
1:45 | 409 _ 89 90°3 26:14 25°36 +0°78 
406 é 92 lf 
403 3 95 
1:55 | 403 = 95 \ 94:7 27-42 26°36 +1:06 
4()4 Fe 94 
1:65 é 


