268 
APPENDIX. 
[South Coast. 
In addition to the tables of longitude for the south coast of 
Terra Australis, I subjoin, for the satisfaction of nautical and geo- 
graphical readers, a table of the rates of the time keepers, to show 
their deviations and the errors in longitude during the several 
passages from one fixed point to another ; commencing November 1, 
1801, at the Cape of Good Hope, and ending May g, 1802, at Port 
Jackson. From this table, the corrections for variation of rates and 
supplemental error, which have been applied to obtain the corrected 
longitudes by the time keepers, will be more distinctly seen. 
TABLE VII. 
Variations in rate and errors in longitude, made by Earnshaw's 
time keepers No. 543 and No. 520, between the Cape of Good 
Hope and Port Jackson. 
Departure taken. 
Ratesof time keepers losing. 
Variations in mean rate 
Errors in long, on arriving 
Daily part 
of »upple- 
mental 
errors. 
Place. 
Longit. East. 
No. 543. 
No. 520. 
Mean. 
During 
the passage. 
Number 
of days. 
Daily ac- 
celeration. 
With rate 
before found. 
With rate 
accelerated. 
Cape of G. Hope 
King G. Sound 
Port Lincoln 
Kanguroo Island 
Port Jackson 
• * it 
18 25 7 
117 53 10 
135 44 51 
(The time 1 
137 57 11 
151 11 4S 
5,33 
6,46 
8,43 
nepers w 
8,46 
9,886 
(First l 
15,84 
16,72 
18,82 
'ere let d 
1 18,07 
| 17,70 
ates on e 
10,585 
11,590 
13,625 
own at K 
13,265 
13,793 
trriving.) 
* 
1,005 
2,035 
anguroo Isla 
0,528 
43,7 
57 
nd, prevk 
| 34 
0,0230 
0,0357 
msly to th< 
0,0155-2 
13 55,8 E. 
22 10,2 
3 following rat 
17 16 
8 18,8 E. 
7 25 
es.) 
14 57,4 
l"l 41 E. 
7,80 
26 40 
In altering their rates between one station and another, the 
time keepers are supposed to have done it, not suddenly, but gra- 
dually and uniformly, by the quantities marked in the column of 
daily acceleration ; which quantities are the results of the variations 
in the mean rate during the passage, divided by the number of days. 
The daily acceleration ; is not much in any case, yet it makes a 
material difference in the longitude after some time ; and as the 
application of this difference has always diminished the error found 
on arriving at any station, it is a satisfactory proof that the acceler- 
ated rate is nearer to the true going of the time keepers on the pas- 
sage, than the rate found at the commencement. 
The difference of longitude produced by the acceleration at 
