[JACKSON] POTENTIAL AND CONDUCTIVITY OF THE AIR 73 
POTENTIAL OBSERVATIONS. 









Station, Winter Harbour. Date, June 21, 1909. 
| V 
Time L R Div. A H per | Sign | Remarks. 
| | metre 
h. m 
1640 | 6.2 10601122 | "106 | 1:42 foe 
Bo) ae Os 4 0) Rog Fit RAS 50) 22) Bar 30716 
179: | 6.001 15.8) 11.8 | 103 Feu Temp. 39 
De 7 ONG UNIS DL CR 120). cy. 85 | .. |Hum. 94 
1S 6:81)4631 12.6 | RON EEE 78 | .. |Wind calm 
220i 6-601R06:6:!.18.2 | 114 s0 | Sky blue 
Oe ew Ocp er AC 140) 124 85 | 
S301 02.401271 | 4,5 | 125 88 
Beer 70) 16-1308 |e 219 S4 
B72 TOL 14.2) 188 87 | 
100 G82) S66 | 18s4 |) 116 82 | 
D | G50! ©6250) 13.0))- 113 80 | | 
18 3 | 10.0| 9.0 | 19.0 | 161 113 
8 14-051 13 011127-0:°2208 146 | 
13 | 13.0 | 12.0 | 25.0 | 199 140 | 
Be) A se 2 OS. D | 150 
23 | 10.5 | 9.5 | 20.0 | 168 EL LSù 
PAS Wk eB || WMG |) BPO 182 | 128 | A few cirrus clouds. 
Soa aloe ON he On| 230) 1-188 | 132 





The relative humidity during the whole series of observations 
was between 90 and 100, and consequently no variation in potential 
or conductivity due to humidity could be determined from the 
experiments. 
The accompanying table gives the mean value of specific conduc- 
tivity for potentials of given value. 
POTENTIAL. x x 10 
JUL. 40% VOS jE INN Mit tos! ak ale cies ead < ol 
75 to 100 PEN SC ATEN CSS A ET 3.00 
100 to 125 eC esr Uo MEL AL HSE LU HE 2.99 
125 to 150 FE | DEI San eae 8 OA tan Ve 2.16 
PARDVET RM RE SA Re Ne es ont 2.04 
A very marked decrease in conductivity is here indicated when 
the potential rises above 125 volts per metre. 
