152 
Lieut. Foster’s observations on the diurnal changes 
North end of Needle to the N. W. 
Date. 
Mean 
Time of 
Obser- 
vation. 
A. M. 
or 
P.M. 
Reading of 
north end of 
needle. 
Temp. 
Faliren'. 
Direction of 
north end of 
needle during 
westerly daliy 
variation. 
Time that a ho- 
rizontal needle 
took to make 
60 vibrations. 
Winds. 
Weather, 
Remarks, &c. 
Instr. 
1825. 
h, m. 
O 
m. s. 
Mar. 6th 
'I 20 
P.M. 
N 45 00W 
= 24 
3 45 
45 00 
—25 
17 54-5 
S W mod. 
Hazy 
5 15 
45 40 
-27 
w 52,5 
5 5 ° 
45 5 ° 
—27 
6 15 
46 00 
—27 
1 7 5 J -8 
West 
6 50 
46 00 
—27 
Mod. 
Hazy 
7 15 
46 10 
2 8 
l 7 5 2 >3 
7 5 ° 
46 10 
—29 
17 52,7 
8 54 
46 00 
—29 
l 7 5 6 -5 
c 
9 15 
45 5 ° 
—29! 
9 45 
46 00 
— 3 ° 
10 5 
46 00 
—30 
1 7 5 6 «7 
Ditto 
Ditto 
Max. easterly 
10 58 
46 10 
— 301 
J 7 54-5 
Stars scarcely visible 
variation. 
11 50 
46 10 
-3H 
.. ...... 
17 5 6 -3 
through the haze. 
Mar. 7 th 
I IO 
A.M. 
46 30 
— 3 i 

17 55-6 
Westerly 
Very hazy 
2 3 
47 3 ° 
— 3 i 
........ 
*7 5^5 
Mod. 
3 0 
48 00 
— 3 1 
. • H3 • . 
1 7 5 6 - 6 
3 53 
48 30 
— 3 i 
• • cd • . 
18 0,4 
5 i° 
49 10 
—31 
. • * 8 
17 55-2 
5 4 ° 
50 20 
— 3 i 
6 10 
5 ° 3 ° 
— 3 'h 
• • u 
17 59>7 
6 50 
50 50 
— 3 H 
(D 
• * M * * 
*7 57-5 
7 i 5 
50 50 
— 3 H 
4 -» 

North 
Hazy 
7 5 ° 
51 00 
3 l h 
.. f-t .. 
17 56,1 
Light 
9 5 
50 40 
— 3 l h 
17 59-8 
+ 10 0 
51 10 
— 3 °h 
17 57 
Max. westerly 
10 35 
51 10 
3 °l 
variation. 
in ,j 0 
5 1 00 
30 
Calm 
Clear and fine 
1 X 10 
51 00 
J 
—30 
17 56,2 
weather, a few 
thin clouds 
ix 30 
5 ° 55 
— 3 ° 
near the horiz. 
- 
0 5 
P. M. 
50 50 
— 3 ° 
*7 55 - 8 
N W light 
0 7 
50 00 
—30 
0 9 
49 4 ° 
—30 
0 20 
49 3 ° 
— 3 ° 
1 10 
49 20 
— 2 9 i 
17 53-3 
1 40 
48 30 
—29 
1 55 
47 5 ° 
—281 
17 5°-5 
2 20 
47 4 ° 
— 281 
2 50* 
47 4 o 
—284 
3 i° 
47 4 ° 
-2»A 
17 53-4 
3 38 
47 30 
— 28A 
17 3 >2 
3 J 
5 5 
47 4 ° 
2 
—29 
17 55 - 8 
Easterly 
Very fine 
6 5 
47 5 ° 
—29 
17 54-6 
Light 
and clear 
7 3 
48 00 
—30 
17 55-6 
— 7 52 
47 20 
—30 
J 7 54-5 
Max. easterly var. 
9 5 
47 20 
—30 
*7 55-5 
happ nd at 2 h 50 m 
9 4 2 
47 4 o 
— 3 ° 
A.M. on the 8th. 
10 00 
48 00 
—30 
17 55 
Easterly 
Hazy 
1 1 00 
4 8 3 ° 
— 3 ° 
»7 55-7 
Mod. 
11 30 
48 30 
—30 
Midn* 
48 20 
— 3 ° 
17 56 
Very thick 
weather 
