( >74 ) 
abled with a tolerable certainty to compleat the Syf- 
tem of the Magnetick Variations, which i was forced 
to leave untinilhed, as to this part of the Ocean, 
in iny General Chart thereof, for want of the Qb- 
fervations requifite. 
In the mean time, pleafe to take the following Ac- 
count extra&ed from Capt. Rogers's Journal} wherein 
the firft Column gives the correct Latitude of the 
Place} the fecond, the Longitude Weft from London , 
ascftimatedby Reckoning} and the third the Vari- 
ation, which in this whole Track is Eafierly . 
Variations obferVed in the Great South-Sea , from 
the South Cape of Calefornia to the ijland of 
Guana or Guam, one of the Ladrones. 
January 
Lat. corrett. 
Long. 
Weft 
Variation 
1709-10. 
every 
Day 
from London 
Hafterly. 
12 
22 
16 
n 4 
09 
03 
00 
21 
18 
1 14 
42 
02 
50 
20 
2 4 
XI 5 
02 
50 
15 
IP 
25 
115 
45 
02 
50 
18 
56 
116 
24 
02 
45 
18 
00 
117 
06 
02 
45 
17 
II 
117 
30 
02 
i 5 
' ' 
16 
32 
118 
05 
02 
00 
2 C 
*5 
44 
118 
54 
01 
so 
15 
00 
120 
i 5 
01 
30 
14 
4 9 
122 
os 
01 
10 
14 
36 
124 
25 
OO 
50 
25 
*4 
24 
12 6 
45 
00 
40 
M 
H 
129 
05 
00 
45 
*3 
5 o 
131 
23 
CO 
50 
13 
2 9 
132 
5 » 
01 
00 
13 
2 9 
< *34 
4 * 
01 
10 
13 
22 
136 
48 
01 
15 
3 C 
13 
27 
13 9 
21 
01 
25 
13 
32 
142 
07 
01 
30 
Feb. 1 
13 
'32 
144 
37 
01 
40 
36 
H7 
32 
01 
5 o 
