XXVI 
CAPTAIN ELLIOT’S MAGNETIC SURVEY OF THE INDIAN ARCHIPELAGO 
Table A. 
Observatory at Singapore. — Hourly observations made during the Month 
Astron. Mean Time"! 
of Station. j 
15. 
16. 
17. 1 
18. 
19 . 
20. 
21. 
22. 
23. 
0 . 
X 1-000371 = l'-000371. Declinometer No. II. 
Sums 
796-8 
791-7 
784-1 
771-9 
758-6 
755-0 
769-8 
791-1 
813-2 
827-3 
Means of 16 days ... 
49-80 
49-48 
49-01 
48-24 
47-41 
47-19 
48-11 
49-44 
50-83 
51-71 
Diurnal changes ... 
— 0'-55 
-0'-87 
-l'-34 
— 2'-ll 
-2'-94 
-3'-l6 
— 2'-24 
-0'-91 
+ 0'-48 
+ T-36 
Diurnal oscillation ... 
2-61 
2'-29 
l'-82 
l'-05 
0'-22 
O'-OO 
0'-92 
2'-25 
3'-64 
4'-52 
Diurnal declination . 
37' 10" 
+ 1° 
36' 51" 
36' 23" 
35' 37" 
34' 49 " 
34' 34" 
35' 29 " 
36' 49 " 
38' 12" 
39 ' 05" 
a^l + ^^ = 1'*0047 X 1‘00037=1'’004. Declinometer No. III. 
Sums 
1563-3 
1557-0 
1549-9 
1536-4 
1527-6 
1526-2 
1541-3 
1560-8 
1583-3 
1594-8 
Means of l6 days ... 
97-71 
97-31 
96-87 
96-03 
95-48 
95-39 
96-33 
97-55 
98-96 
99-63 
Diurnal changes ... 
-0-54 
-0'-94 
-]'-38 
— 2'-22 
-2'-77 
-2'-86 
-l'-92 
-0'-70 
+ 0'-71 
+ T-43 
Diurnal oscillation... 
2'-32 
l'-92 
l'-48 
0'-64 
0'-09 
O'-OO 
0'-94 
2'-l6 
3'-57 
4'-29 
Diurnal declination . 
36' 52" 
+ 1° 
36' 28" 
36' 01" 
35' 11" 
34' 38" 
34' 33" 
35' 29 '' 
36' 39 " 
38' 07" 
38' 50" 
a^l+^^ = l'-0005 X 1-0003= l'-0008. Declinometer 
No IV. 
Sums 
1558-4 
1472-3 
1 463-0 
1449-7 
1429-3 
1427-0 
1439-7 
1 456-4 
1473-8 
1486-2 
Means of 16 days ... 
97-40 
98-15 
97-53 
96-65 
95-29 
95-13 
95-98 
97-09 
98-25 
99-08 
Diurnal changes ... 
-0'-7l 
+ 0'-04 
-0'-58 
-l'-46 
-2'-82 
-2'-98 
— 2'-13 
-l'-02 
H-0'-14 
+ 0'-97 
Diurnal oscillation . 
2'-27 
3'-02 
2'-40 
l'-52 
0'-l6 
O'-OO 
0'-85 
1'-96 
3'- 12 
3'-95 
Diurnal declination 
i 36' 54" 
i +1° 
37' 39" 
37' 02" 
36' 09 " 
34' 48" 
34' 38" 
35' 29 " 
36' 36" 
37' 45" 
38' 35'! 
+^^ = 40"-7 X 1-000451. Declinometer No. V., 
Slims 
660-0 
655-0 
647-4 
626-0 
617-2 
608-3 
635-2 
661-1 
685-8 
708-^ 
Means of 16 days ... 
41-25 
40-94 
40-46 
39-13 
38-58 
38-02 
39-70 
41-32 
42-86 
i 
44-3j 
Diurnal changes .. 
— 0'-74 
-0-95 
-l'-28 
— 2’-18 
— 2'-56 
-2'-94 
— 1'-80 
- 0-70 
+ 0'-35 
+ l'-3j 
1 
Diurnal oscillation 
2'-20 
l'-99 
l'-66 
0'-76 
0'-38 
O'-OO 
l'-14 
2'-24 
3'-29 
4'-?| 
Diurnal declination 
. 36' 33" 
+ 1° 
36' 20" 
36' 00" 
35' 06" 
34' 43" 
34' 21" 
35' 29 " 
36' 35" 
37 ' 38" 
38' 37l 
1 
1- 
