136 
Lieut. Foster's observations on the diurnal changes 
North end of Needle to the North. 
Direction of 
Meau Time 
A. M. 
Reading of 
Temp. 
north end of 
Time that a ho- 
Date. 
of Obser- 
or 
north end of 
Fahren 1 . 
needle during 
rizontal needle 
Winds. 
Weather. 
Remarks, &c. 
vation. 
P. M. 
Needle. 
westerly daily 
tuok in make 
Instr. 
variation. 
60 vibrations. 
1825 . 
h. m. 
0 / 
O 
m. s. 
Apr. 1 6th 
6 OO 
P.M. 
N 7 10W 
+ 2| 
18 19,6 
7 OO 
7 IO 
Zero 
18 19,3 
8 OO 
6 50 
— 1 
18 17,5 
9 OO 
5 4 o 
— 3 
18 20,9 
Calm 
Clear and 
9 30 
5 3 o 
— 4 
fine 
IO IO 
5 3 ° 
— 4 
is 33,5 
IO 30 
5 30 
— 4 2 
II IO 
3 5 
— 4 § 
is 37 ■ 
— I I tc 
2 OO 
'-'W 
5 
18 36,7 
Max . easterly 
Apr. 17 th 
1 5 
A.M. 
3 3 ° 
— 6 
18 40,7 
variation . 
2 7 
4 i° 
— 6 
18 43-3 
2 52 
4 30 
— 7 
18 44,2 
3 10 
5 20 
— 7 
4 5 
7 30 
— 7 
18 54,2 
5 0 
8 20 
— 7 
18 27,5 
5 3 ° 
6 20 
— 6 
-d 
6 00 
7 30 
~ 6 
c 
• • . . 
18 3 7>5 
6 30 
8 00 
— 5 
rC 
• • 4 —* • ‘ 
Easterly 
7 OO 
8 30 
— 5 
.d 
• • bJO • * 
18 39 
light 
7 30 
• 
8 40 
— 5 
• • TJ . . 
18 44,5 
9 00 
8 40 
+ of 
<L> 
* * * * 
18 49,5 
9 40 
11 30 
+ 2 
-M 
O 
IO OO 
12 30 
+ 3 
0 
01 
0 
13 30 
+ 3 i 
I I OO 
13 30 
+ 4 
II 30 
15 20 
+ 6 
-j-Noon 
17 30 
4- 6i 
Max . 'westerly 
1 5 
P.M. 
12 50 
4 - 7 
variation . 
1 30 
8 00 
+ 7 
2 2 
0 
0 
+ 6 
9 3 ° 
7 00 
— 3 f 
18 32,0 
IO OO 
6 10 
— 3 
18 23,5 
IO 30 
6 00 
— 4 
I I OO 
5 4 ° 
— 5 
18 20,0 
II 30 
4 3 ° 
— 5 
Midn* 
North 
— 5 
18 46,0 
Calm 
Clear fine 
Max . easterly 
weather. 
variation . 
