xlvi 
CAPTAIN ELLIOT’S MAGNETIC SURVEY OF THE INDIAN ARCHIPELAGO. 
Table A. 
Observatory at Cocos Island. — Hourly observations made during the Month of August 
Asti’on. Mean Time "I 
of Station. J 
15. 
16. 
17. 
18. 
19. 
20. 
21. 
22. 
23. 
0. 
H 
:-?)= 
1' X 1*000371 = l'*00037l. Declinometer No. II. 
Sums 
Means of 27 clays ... 
Diurnal changes ... 
Diurnal oscillation... 
Diurnal declination . 
1243*8 
46*07 
o'*oo 
2'*70 
08' 00" 
-1° 
1247*0 
46*19 
+ 0'*12 
2'*82 
07' 53" 
1244*7 
46*10 
+ 0'*03 
2'*73 
07' 58" 
1255*6 
46*50 
+ 0'*43 
3'* 13 
07' 34" 
1242*0 
4600 
— 0'*07 
2'*63 
08' 04" 
1200*2 
44*45 
-l'*62 
l'*08 
09' 37" 
1127*5 
43*37 
-2'*70 
o'*oo 
10' 42" 
1175*1 
43*52 
-2'*55 
0’*15 
10' 33" 
1194*9 
44*26 
— 1'*81 
0'*89 
09' 49" 
1229*5 
45*54 
-0'*53 
2'*17 
08' 32" 
“( 
1 l'*0047 X 1*00037 = l'*004. Declinometer No. III. 
Sums 
2652*1 
2654*5 
2755*9 
2766*3 
2753*7 
2610*4 
2679*2 
2675*7 
2695*3 
2731*2 
Means of 27 days ... 
102*00 
102*10 
102*07 
102*46 
101*99 
100*40 
99-23 
99-10 
99*83 
101*16 
Diurnal changes ... 
+ 0'*01 
+ 0'*11 
+ 0'*08 
+ 0'*47 
o'*oo 
-l'*59 
-2'*76 
-2'*89 
-2'*16 
-0'*83 
Diurnal oscillation... 
2'*90 
3'*00 
2'*97 
3'*36 
2'*89 
l'*30 
0'*13 
o'*oo 
0’*73 
2'*06 
Diurnal declination . 
07' 56" 
-1° 
07' 50" 
7' 52" 
7' 28" 
7' 56" 
9' 32" 
10' 42" 
10' 50" 
9' 12" 
8' 46" 
