xl] INTRODUCTION TO THE MAKERSTOUN OBSERVATIONS, 1843. 
TABLE 13—continued. 
Are at Number 
commence- of 
ment. | vibrations. 
Are at Number 
commence- of 
ment. | vibrations. 
Time of | Tempera- 
one ture 
vibration. | of Needle. 
Time of | Tempera- 
one ture 
vibration. | of Needle. 
Gottingen 
Gottingen 
Mean Time. 
Mean Time. 
Dec. 
Dec. 
Dec. 
Dec. 
Dee. 
Dec. 
Dec. 
Dec. 
Dec. 
Dec. 
Dee. 
Dee. 
Dec. 
Dec. 
Dec. 
Dec. 
Dec. 
Dec. 
Dec. 
Dec. 
Dec. 
Dec. 
Dec. 
Dec. 29 
Oct. 
Oct. 
Oct. 
Nov. 
Nov. 
Nov. 
Nov. 
Noy. 
Nov. 
Nov. 
Nov. 
Nov. 
Nov. 
Noy. 
Nov. 
Nov. 
Nov. 
Nov. 
Nov. 
Nov. 
Nov. 
Nov. 
Nov. 
55. The following are the mean values of T, 
T’ = 12°0, 0 = 71° 10’ :— 
and the consequent values of k, 
Jan. —Aug. 23. T= 9:52; 
Aug. 24—Sept. 1. T= 10-40; 
Sept. 5—Noy. 13. T = 10°65; 
k = 0:0000158, 
k = 0:0000133, 
k = 0:0000126, 
approximately k = 0:000015 
approximately & = 0:000014 
approximately & = 0:000013 
Nov. 13—Dee. T= 1007; &=0-:0000141, approximately & = 0:000014 
The approximate values of & are those given at the foot of each page of the 
Magnetical Observations. It will be observed that all of these values differ very 
considerably from that obtained, No. 51, which was adopted in the reductions for 
the Abstracts, after the above values of k were printed in the notes to the Magneti- 
cal Observations. 
56. Adjustments. 
August 23. 1843. The balance needle was removed for the purpose of deter- 
mining its temperature coefficient; the needle was placed in a small copper trough 
with a glazed lid, which trough was surrounded by water, contained in a larger 
trough. 
* Aug. 23 and 31, and Nov. 12. See note on preceding page. 
