[JACKSON] MAGNETIC OBSERVATIONS IN CANADA 141 
Moment of Inertia, at O°C log K—2-37518. 
P 7 
2 (1+) 
Fe Ce aT 
p° (: pes 
Comparisons were made with Observatory Standards at Agincourt 
in October and November 1909 and resulted as follows :— 
HORIZONTAL INTENSITY. 
Horizontal Intensity C. G. S. Units. 
Date 1909 | 75th. Meridian 
time. 
Agincourt Magnetometer 
Standard. No. 8 AS"? 
H M 
Oct. 29 13 44 0-16291 0- 16276 + -00015 
120 14 35 0- 16295 0-16310 — .00015 
Nov. 2 11 4 0- 16267 0- 16232 + -00035 
ee 11 54 0-16268 0-16262 + .00066 
RE 14 16 0-16295 0-16254 + -00041 
See? 14 56 0-16301 0-16284 + -00017 
Mean correction + -000165 
— + -00101 
part of H 
DECLINATION. 
Date 1909 | 75th Meridian Againcourt Magnetometer A—8 
time Standard No. 8 
H M oO O7 | , 
Oct. 29 12 51 —6 6-0 —6 9-7 | +3-7 
20 15 13 —6 6-0 —6 7-8 +1-8 
Nov. 2 10 29 —5 58-0 —6 1.2 +3-2 
HT 12210) —6 4-0 —6 5-8 +1-8 
ao 13 49 —6 5-9 —6 8-6 Seer 
via ee 15 23 —6 4-4 —6 6-7 +2-3 
NE 15 11 —6 4-5 —6 7-0 +2-5 
cyte Ne 15 21 —6 4-3 —6 6-8 +2-5 
Mean correction 29 
In the high magnetic latitudes visited during 1908-09, owing to 
the smallness of the Horizontal force it was found impossible to use this 
instrument for deflections. Some observations were made at Winter 
Harbour with oscillations alone, the period of one vibration being about 
15 seconds but on account of the large changes continually going on 
