54 
A VOYAGE TO 
[ East Coast. 
1802. Mount Westall, station on the top, - - S. 63° 20' E. 
September. . ^ 0 ^ 
Sunday 5. Aken's Island, station on the N. E. end, - b. 43 10 E. 
Pine Mount, - - - - S. 25 5 E. 
Long Island, the north point, distant 8 miles, N. 65 5 W. 
Peaked Hill, west side of Broad Sound, - N. 6T 25 W . 
Northumberland I., a peak, marked h, - N. 22 25 W. 
,No. 3 peak (of Percy Isles), N. 20 10 E. 
Captain Cook observed, when taking bearings upon the top of 
Pier Head, “ that the needle differed very considerably in its posi- 
“ tion, even to thirty degrees, in some places more, in others less ; 
“ and once he found it differ from itself no less than two points in 
“the distance of fourteen feet.” (Hawkesworth, III, 126); from 
whence he concluded there was iron ore in the hills. I determined, in 
consequence, to make more particular observations, both with the 
theodolite and dipping needle ; and shall briefly state the results 
obtained on this, and on the following day. 
Azimuths were taken, and the bearing of Mount Westall, dis- 
tant thirty-four miles, was set at S. 63° 28' E. (true), whilst the theo- 
dolite remained in the same place ; and from a comparison between 
this bearing and those of the same object at different parts of the head, 
the variations were deduced. The dip was observed with both ends 
of the needle, and the face of the instrument changed each time. 
At the highest top of Pier Head, Var". 
3 ° 
2.5' E. 
Dip 53 * 
' 20' S. 
West, three yards from it, - 
6 
10 
S. E. three yards, - - - 
10 
5 
S. S. E., ten yards, - 
8 
6 
52 
19 
North, four, - - - - 
6 
55 
N. E., twenty, - 
6 
50 
50 
35 
N. N. E., one-sixth mile, at the water side. 
7 
6 
50 
28 
S. E., one-third mile, at ditto, 
8 
2 
50 
50 
There are here no differences equal to those found by captain Cook ; 
but it is to be observed, that he used a ship’s azimuth compass, pro- 
bably not raised further from the ground than to be placed on a stone. 
