652 ALEXANDER MACFARLANE ON THE 
TasLe VITI.—Deduced Curves. 
Difference of Potential Curve, V=66-940 ,/ {s’ + -20503s' . 

Electrostatic Force Curve, R=66°940 ,/ 1+ a 
Pressure Curve, p = ‘18168 4 + ol : 
Length of Spark in Difference of Potential Electrostatic Force. Pressure. 
Centimetres. , mC.G.S. units. ee a 2 
A : ?~ 87x 9814" 
025 5076 203:05 1:3470 
05 7559 151718 9267 
075 9°701 129°35 6783 
y 11691 11691 6542 
2 19-052 95°26 3679 
3 26:056 86°85 3058 
‘4 32932 82°33 ‘2748 
2) 39°745 79°49 "2562 
6 46524 7754 2437 
ia 53'281 7611 "2349 
8 60:024 75°03 2282 
“9 66°756 74:17 2231 
1:0 73°484 73°48 "2189 

TABLE [X.—Distance Curves, 4th June 1877. Electrodes, small discs. 
Pressure, atmospheric. 
Equation, V =52°840,/ {s’ + 56866s} . 
Mean Diff. 

Length of Observed aa : Calculated 7 
g Spat a Deflection. Zero. Diff. of Ee ees Diff, of Difference. ih Md 
entimetres. nN. Vv. Potential. Potential sai ery Potential. Vi-V. 
Ss. -| ni—n. 7 V1. 3 V. 
468 498°5 30°5 
: 470 - 28°5 x ; 
25 470 ‘ 28-5 28°5 24-74. 23°91 +0°83 
470 s 28°5 
454 a (bt esee ) 
é 454 5 44:5 ; 0 
5 poe ee t 445 | 38°63 38°63 0-00 
454 7 44-5 | J 
436 a 62°5 : 
: 438 sr 60:5 ‘ : ; : ia 
03 437 ; 61-5 60°75 5274: 52°56 +018 
440 ic 585 J 
423 as 75°5 
. 423 oa 75:5 x ; 2 4 . fe : 
1:0 499 a 76 -h 7625 66°19" |) ¢@psl9 0:00 ; 
421 ’ "75 | 
e410 3 88°5 a 
125 e410 ae 88:5 89°2 7743 79°67 —224 | 
e408 - 90:5 4 


