XIV 
CAPTAIN ELLIOT’S MAGNETIC SUKVEY OF THE INDIAN ARCHIPELAGO. 
Table 
Observatory at Madras. — Hourly observations made during the Months of Angus 
Astron. Mean Time 1 
of Station. j 
15. 
16. 
17. 
18. 
19. 
20. 
21. 
22. 
23. 
0., 
1+Mj = i'.0047 X 1*0004-1' 
0051. Declinometer Noj' 
Sums 
351*8 
355*0 
356*5 
384*0 
431*8 
437*3 
400*0 
354*9 
314*1 
28i) 
Means of 33 days ... 
10*66 
10*76 
10*80 
11*64 
13*08 
13*25 
12*12 
10*75 
9*52 
8*3 
Diurnal changes ... 
-0'*01 
+ 0'*09 
+ 0'*13 
+ 0'*97 
+ 2'*41 
+ 2'*58 
+ 1'*45 
+ 0'*08 
-l'*15 
— 2'2 
Diurnal oscillation... 
2'*01 
2'* 11 
2'*15 
2'*99 
4'*43 
4'*60 
3'*47 
2'*10 
0*87 
0'9 
Diurnal declination . 
54' 41" 
0“ 
54' 47" 
54' 50" 
55’ 40" 
55' 11" 
57' 17" 
56 09 " 
54' 47 " 
53' 33" 
52' 4’' 
Observatory at 
Car Nicobar. — 
Hourly 
observations made during tii 
= 1' X 1*00047 = 1 * 00047 . Declinometer No. 
1 Sums 
426*7 
425*5 
422*9 
419*2 
418*3 
420*4 
428*4 
435*2 
438*9 
436 
1 Means of 5 days ... 
85*34 
85*10 
84*58 
83*84 
83*66 
84*08 
85*68 
87*04 
87*78 
87 s 
I Diurnal changes 
-l'*00 
— 1'*24 
-l'*76 
-2*50 
-2*68 
— 2'*26 
-0'*66 
+ 0'*70 
+ T-44 
+ T8 
Diurnal oscillation... 
1 *68 
T*44 
0'*92 
0'*18 
o'*oo 
0'*42 
2'*02 
3’*38 
4'*12 
4' 6 
Diurnal declination . 
5T 39" 
51' 25" 
50' 53" 
49' 09" 
49' 58" 
50' 23" 
5T 59 " 
53' 21" 
54' 07 " 
54' :' 
+ 1" 
* 
+ ^j = l' X 1*00034 = 1 '*00034. Declinometer No. • 
Sums 
250*0 
249-0 
247*2 
243*2 
242*8 
244*7 
203*0 
257*6 
261*4 
Means of 5 days ... 
50*00 
49*80 
49*44 
48*64 
48*56 
48*94 
50*75 
51*52 
52*28 
Diurnal changes ... 
— 0'*83 
— T*03 
-1 *39 
-2*19 
-2'*27 
-T*89 
-0'*08 
+ 0'*69 
+ 1'*45 
Diurnal oscillation... 
l'*44 
T*24 
0'*88 
0’*08 
o'*oo 
0'*38 
2'*19 
2'*96 
3'’*72 
Diurnal declination . 
51' 50 ' 
+ 1° 
51' 38" 
51' 16" 
50' 28" 
50' 23" 
50' 46" 
52’ 35" 
53 21" 
54' 07" 
afl +Mj = l'-004 X 1*0004=1'*004. Declinometer NojH 
Sums 
505*6 
504*9 
502*8 
499*3 
499*4 
503*3 
510*2 
517*0 
519*3 
51< 
Means of 5 days ... 
101*12 
100*98 
100*56 
99*86 
99*88 
100*66 
102*04 
103*40 
103-86 
10 
Diurnal changes ... 
— 1'*20 
— 1'*34 
-l'*76 
-2'*46 
— 2'*44 
-l'*66 
-0'*28 
+ 1'*08 
+ T*54 
+i 
Diurnal oscillation... 
l'*26 
l'*12 
0'*70 
0*00 
0'*02 
0'*80 
2'*18 
3'*54 
4'*00 
4 
Diurnal declination . 
51' 04" 
+ 1° 
50' 56" 
50’ 31" 
49 ' 49 " 
49 ' 50" 
50' 37" 
51' 59 " 
53' 21" 
53' 47 " 
53 ' 
