D. Boboutief—Dissipation of Electricity in Gases. 129 
log sin pe log sin = 
Pp+Ap_ 2 2 
P 
a "le ay - 
log sin ao log sin>+4 log sin*— log sin 3 
from this we obtain: 
[2 log sin 5 — Alog sing | 
+. . 
lo sin 4 — log sin $ | 
os 2 
eee we see that the term expressed in the parenthesis is less 
than nity. 
a, 
—¢ 
In the worst case, when A log sin a and A log sin ; have 
as Ap 
Opposite signs, we have for the greatest value of - 
A log sin + A log sin> 
A 
(8) <P : - 
log sin log sin > 
According to this formula I ah computed the greatest 
possible error in the determination of the quantity p in my 
experiments; and have selected only those results in which , 
is not more than 0°3: the rest I have rejected. 
The electrical condition was maintained from eight to t 
days, as for i nstance, from 30th June - 10th July, wid 3 in 
another case from 22nd J une to 30th Jun 
The following are the results sbtained 2 
I. In dry air at the ordinary pressure. 
Hour. a a | Ap ° 
No. | Month. | Day. - e t hal . 
1 Jul pe rr Te ee ae 
ral 12 toa 349m 2 45 0-2 118 
2 * oS) 8 $9 152 1 0 SESE a: | 
= 21 ; 1063 | 4 525) 0°08 | 247 
. 21 3 37 | 1180 9 15} 0°09 | 174 
S | Angst}: 34°] 2 18 Fo Ol oe ie 
2 14 S44 139 | 15 30 0-28 | 238 
: 14 3 167 | 1 75| 0°25 | 251 
4 . 19 | 4 or 19 6 see a 
* 45 0° 
ee Se ee eee eee 
