Profejfor Bugge’s Agronomical Obfcrvalion: 
22 
Mean time at 
Copenhagen. 
Obferved 
geocentric 
longitude 
of ? . 
Obferved 
geocentric 
latitude 
of ? . 
Halley’s er- 
ror, 
DE LA LAN Dt’s 
error, 
in long. 
in lat. 
in long. 
in lat. 
1781 
Sept. 13 
22 
oa. 1 
4 
• / // 
i 38 6 
1 43 2 4 
1 49 46 
1 52 11 
s » 0 / // 
6 18 39 15 
6 29 38 48 
7 10 36 42 
7 14 l 5 ! 7 
0 in 
3 28 12 N 
3 3 9 
3 23 48 S 
o 33 3 
// 
+ 11 
+ 17 
+ 16 
T 12 
n 
+ 3 
+ 1 
- 7 
- 4 
11 
+39 
+44 
1/ 
+ 3 
— 2 
1784 
Sept. 20 
25 
oa. 2 
i 4 
21 
0 37 17 
0 39 57 
0 44 49 
0 54 7 
1 0 42 
6 9 40 27 
6 15 52 59 
6 24 35 34 
7 9 3 ° 4 C 
7 18 13 11 
i 6 15 N 
a 57 5 o 
3 44 21 
0 16 41 
313 s 
+ 4 1 
+ 36 
4- 10 
+ 17 
+ 1 5 
+ 3 
4- 6 
+ 1 
+ 1 
+ 17 
4- 18 
+ 12 
+ 3 
1786 
Aug. 19 
2C 
21 
2$ 
2C 
2 25 57 
>2 26 1^ 
2 26 32 
2 28 3C 
) 2 28 4} 
6 4 45 54 
6 5 5 6 11 
6 7 6 42 
>6 15 7 sc 
'6 16 27 31 
0 23 7 N 
o 19 40 
D it) 20 
0 8 46 S 
0 12 32 
- 5 
- l l 
~ l 3 
— 0 
— 22 
- 3 
- 9 
- 5 
- 2 
- 4 
+ 17 
+ 2 3 
— 12 
+ 2 
The angle at the planet or the commutation — P 13 not 
dire&ly to be taken out of the table. The difference between 
the obferved geocentric longitude of the planet and the geo- 
centric longitude of the fun, calculated from M. Mayek’s folar 
tables, is the angle at the earth, or the elongation - T. From 
this elongation, which is to be depended upon to very few 
feconds, and from the planet’s and the earth’s diflances from 
the fun, according to the tables, the commutation is calcu- 
lated, and the geocentric longitude is reduced to the Heliocen- 
tric longitude. The angles P, T, and S, at the fun, thus 
found, are likewife ufed to calculate the heliocentric latitude. 
According 
7 
