igo Mr. Flinders on certain Differences 
and east coasts of New Holland, I always endeavoured to take 
the angles on shore with a Troughton's portable theodolite, 
and to observe for the variation in the same places, that all the 
errors might be done away or corrected ; and as I was fre- 
quently fortunate enough to carry on my surveys in this 
manner for weeks together, instances that might corroborate 
or contradict the preceding remarks are neither very numerous 
or pointed ; the following are the most remarkable. 
Timet 
Latitude. 
Longitude. 
Number of 
compasses 
used. 
Number of 
sets of observa- 
tions taken. 
Place of 
the 
compass. 
Supposed 
true 
variation. 
Observed 
variation. 
Ship’s 
head. 
Obse 
1802. 
Aug. PM 
O / 
23 51 s 
0 / 
151 42 E 
one 
I amplitude 
binnacle 
0 / 
8 0 E 
12 7 E 
wsw 
Comir 
— AM 
2 3 5 1 
15 1 4° 
— 
— 
— 
IO 15 
WNW 
12, PM 
23 3 ° 
151 11 
three 
6 azimuths 
— 
— 
6 50 
SSE 
Lt. FI 
18, PM 
23 23 
15 1 16 
one 
2 — 
— 
7 45 
7 5 2 
W 
Comir 
3 i 
22 23 
150 38 
two 
4 — 
— 
7 3 ° 
4 49 
E 
Sept. 6, AM 
Upon Pier 
Head 
theodolite 
1 — 
on shore 
8 0 
8 2 
— 
Oct. 14, PM 
20 44 
150 42 
one 
1 amplitude 
binnacle 
7 0 
6 40 
SSE 
Lt. FI 
20, PM 
19 22 
148 40 
— 
1 — ■ 
— 
6 0 
5 39 
S 
Comrr 
21, AM 
18 15 
148 38 
three 
6 azimuths 
— 
— 
5 4 2 
N b. E 
Lt. FI 
Nov. 2, PM 
10 30 
142 32 
one 
2 ■ — 
— 
4 0 
3 3 2 
E 
Comrr 
7, AM 
12 11 
142 0 
— 
2 — 
— 
4 4 
S 
Lt. FI 
9, PM 
12 37 
I42 2 
— - 
1 amplitude 
— - 
5 2 4 
W 
Coma 
1803. 
Jan. 3, PM 
14 20 
I36 l6 
r - - - 
1 — 
- 
2 30 
0 58 
E 
7, PM 
14 20 
* 3 6 37 
— 
1 — 
— 
— 
1 9 
SE 
12 I ?M \ 
l 3 > s am 1 
13 38 
137 20 
— 
2 — 
— 
3 0 
3 47 
Westerly 
Lt. FI 
14, AM 
>3 35 
136 58 
- - 
1 — • 
■ - 
5 5 1 
WSW 
Comrr 
id, PM 
InNW Bay 
(Gr. Eyl.) 
theodolite 
1 azimuth 
on shore 
_ 
3 6 
— 
Feb. 3, AM 
Arnhem S 
Bay 
three 
6 — 
binnacle 
2 20 
2 26 
NWb. W 
9, AM 
= 
theodolite 
| _ 
on shore 
2 20 
— 
Mar. 10, AM 
11 5 
*34 ! 5 
one 
2 — 
binnacle 
1 0 
,5! 
WNW 
endeavoured to get observations for the variation when the ship’s head was in the 
same direction as when I had taken or wished to take a particular set of bearings, and 
I then allowed that variation exactly, whatever it was. The perplexity arising from 
disagreements in bearings was by these means much alleviated, and happy agreements 
were frequently produced, when, without such corrections, there was nothing but 
discord. 
