162 
-sr 
Lieut. Foster’s observations on the diurnal changes 
North end of Needle to the S 85 0 W. The line of min. 
daily variation. 
Temp, 
Direction of 
Mean 
A. M. 
north end of 
Time that a ho- 
Date. 
l ime of 
Obser- 
or 
north end of 
h'ahren 1 . 
needle during 
westerly daily 
rizontal needle 
took to make 
Winds. 
Weather. 
Remarks, &c. 
P. M. 
.Needle. 
vation. 
Instr. 
variation. 
60 vibrations. 
1825 . 
b. m. 
0 
0 
m. s. 
April 1st 
I 15 
1 52 
2 l8 
A. M. 
S 84 
84 
84 
84 
20W 
18 3,5 
Easterly 
moderate 
30 
20 
—25! 
Clear 
18 9,7 
18 15,5 
2 50 
00 
—26 
3 20 
84 
00 
—261 
3 56 
6 00 
84 
82 
no 
26 1 
18 4 
18 10,8 
Squally 
Moderate 
Max. easterly var. 
• 0 0 
> re> O 
[=77 
Fine and 
6 j 5 
82 
L / 
“2 7 
easterly 
Clear 
6 30 
80 
30 
—27 
6 45 
7 00 
79 
79 
3 ° 
20 
—27 

18 15 
9 10 
78 
5 ° 
—24 
a g © 0 0 0 0 © 
iS 23,3 
+ 9 5 ° 
78 
OO 
—23 
10 15 
81 
30 
—23 
©OOOOOG© 
18 9 
10 45 
u 6 
83 
87 
20 
—23 
—23 
17 5 S >3 
The intervals of 
OO U 6 • 
1 1 20 
90 
00 
=—22 
r2 
10 vib’ of the ho- 
11 32 
90 
00 
—22 
53 
bU 
rizontal needle 
11 45 
P. M. 
87 
30 
■ — 21 
<L> 
. . *1 
• ••••*•• 
Easterly 
Clear and 
were rapidly de- 
0 8 
87 
20 
— 20| 
1—4 
17 49 > 8 
light 
Fine 
creasing between 
1 00 
83 
30 
—20 
1 7 49>7 
1 i h and iz h A.M. 
1 49 
90 
00 
— * 9 
17 43*8 
© e © . © • • • 
* » ® 
Max. westerly var. 
2 30 
89 
20 
—19 
3 12 
88 
15 
—19 
17 55>7 
4 00 
87 
30 
—19 
17 54>3 
5 00 
88 
50 
—21 
1 7 44 
6 00 
87 
00 
—21 
17 55 
6 30 
8S 
00 
—21 
7 3 o 
87 
40 
—23 
17 45 
8 00 
88 
00 
—23 
'7 52,3 
— 9 6 
91 
5 ° 
—23! 
17 39>3 
10 40 
89 
3 ° 
™ 23 | 
17 46,1 
11 5 
86 
20 
— 23 j 
17 52,9 
Easterly 
Clear and 
Max. easterly var. 
Apr. 2nd 
11 52 
85 
30 
—25 
17 59 >i 
light 
Fine 
1 00 
A. M. 
84 
30 
■ 26 
s8 5,8 
Easterly 
Ditto 
1 32 
83 
50 
—26 
moderate 
2 10 
83 
20 
—26 
00 
2 42 
82 
5° 
—27 
3 5 
82 
00 
—27 
18 4,5 
+ 42 
81 
40 
—27 
18 8,8 
5 00 
82 
00 
—27 
18 57>3 
6 00 
82 
10 
— 261 
17 53 >5 
8 00 
82 
26| 
18 1 7>5 
9 10 
40 
—24 
18 0,7 
9 47 
83 
00 
—24 
* • <L> . • • 
• •«•»••• 
Ditto 
Hazy 
10 12 
83 
3° 
—24 
• . cj £ * * 
1 7 57,5 
11 5 
84 
20 
—23 
A ct 
* • * J J3 ’ * 
17 56 
1 1 10 
85 
00 
—23 
O 
11 45 
85 
00 
—23 
H 
17 33*8 
Squally 
Max. westerly var. 
