trigonometrical measurements at Spitsbergen . 301 
sphere in respect to temperature and aqueous vapour, are 
computed agreably to the method published by Mr. Daniell, 
in the 13th volume of the Journal of the Royal Institution. 
July 1 7 th. P. M. The weather dull with little wind ; the 
hills generally enveloped in fog. 
Observatory, Sabine. Hill, Foster. 
App . time. 
Barom. 
Merc. 
Air Point . °f 
Deposition. 
Barom. 
Merc. 
Air. 
Point of 
Deposition. 
4 - 3 ° 
29.671 
40 
35 34 
28.012 
39 
37-3 
In a cloud more 
5.00 
29.673 
40 
35 34 
28.009 
36.2 
35 - 2 
or less dense 
during the 
whole period. 
5 - 3 ° 
6.00 
29.674 
29.676 
39-5 
39*5 
35 34 
34-5 34 
28.009 
28.000 
35-5 
34-9 
34-5 
34-9 
29.6735 
39-75 
34-9 34 
28.0075 
3 6 -4 
35-5 
35-5 
Reduction to 32 0 
— .0200 
— .0105 
Capacity 
— .0561 
—.0445 
Capillary action 
+ .0280 
+.0880 
Index 
+.1960 
. . . 
True Barom. heights 
29.8214 
28.0405 
Result. 
Height of the Cone 
1644,58 feet. 
July 18, P. M. A thick fog with a moderate breeze. 
Observatory, Sabine. Hill, Foster. 
App. time. 
Barom. 
Merc. 
Air. 
3.20 
29.675 
40.5 
3 6 
3 - 3 ° 
29.6755 
40.5 
36 
4.00 
29.677 
40 
35-5 
4 - 3 ° 
29.678 
39-2 
35 * 6 
5.00 
24.679 
39 
35-2 
5 - 3 ° 
29.681 
39 
35-2 
6.00 
29.682 
39 
35-2 
6.30 
29.684 
39 
35-2 
7.00 
29.685 
39 
35-2 
7 - 3 ° 
29.686 
39 
35-2 
8.00 
29.686 
39 
35-2 
29.6808 
39-4 
35-4 
Reduction to 32 0 . — .0190 
Capacity . . . — .0554 
Capillary action . . +.0280 
Index . . . +.1960 
True Barom. heights 29.8304 
Point of 
Deposition. 
Barom. 
Merc. 
Air. 
Point of 
Deposition. 
Fog. 
28.021 
36. 
33 -5 
Dense fog. 
- 
28.021 
35-5 
34 
- 
- 
28.014 
3 6 
35-5 
- 
- 
28.024 
3 6 
34 - 8 
- 
- 
28.033 
35-8 
35 - 8 
- 
- 
28.026 
34-8 
34 - 8 
- 
- 
28.029 
34-5 
33-5 
- 
- 
28.033 
35 
34 
- 
- 
28.029 
34-5 
34 
- 
- 
28.027 
35 
33-5 
- 
* 
28.029 
34-5 
33 - 
* 
35-4 
28.026 
35-2 
34-2 
34-2 
—.0075 
—.0441 
+ .0880 
28.0624 
Result. Height of the Cone 1630,66 feet. 
