26 
MR. RUMKER’S OBSERVATIONS 
1828. 
Stars. 
Interval. 
1828. 
Stars. 
Interval. 
July 21 
P. XIV. 280 
30 Libra 
+ 16 45.08 
+ 30 37.68 
July 24 
P. XVIII. 25 
728 Mayer 
P XVIIT Qi 
+ 22 48.54 
+ 35 31.07 
__L_ A7 4Q 
July 22 
r, Libra 
& Libra 
49 Libra 
- 5 37-05 
+ 4 1.13 
+ 10 39.55 
Aug. 20 
689 Mayer 
266 Bod. Ophi. 
+ 7 4.04 
+ 18 21.3 
July 23 
P. XVI. 251 
29 Ophiuchi 
674 Mayer 
7) Ophiuchi 
+ 8 56.27 
+ 11 0.35 
+ 17 28.37 
+ 19 43.53 
Aug. 21. 
745 Mayer 
1 £ Sagittae 
738 Mayer 
+ 17 13.11 
+ 28 28.60 
+ 8 19-92 
It is necessary to remark that the intervals are not given with regard to the 
moon’s centre ; but before full moon with regard to her first, and after full 
moon with regard to her second limb. 
Calculation of the Longitude from the preceding Observations. 
The solar eclipse of the 16th August, 1822, gives according to my calcula- 
tion, without allowance for inflexion and irradiation, for true conjunction by 
Enr nins : : : : : 21h |” 42 S :!o} MeanTime >* >aratnatta - 
Professor Wurm, who has computed this eclipse, finds the true conjunction 
by Beginning ... 2l h 25 m 45 s .53 — 0.907# 
End 00 25 52.77 X 0.238# 
And after applying the corrections for the Moon’s place... 6 = 21 h 25 m 55 s .88. 
From the occupation of Antares 10th April, 1822, Professor Wurm has 
calculated the corrected conjunction 17 h 29 m 18 s .25. My calculation gives 
it 17 h 29 ,n 16 s . 45. 
I found from the immersion of Antares 4th February, 1823, the true con- 
conjunction 20 h 46 m 58 9 .78 — 0\698 #. And Professor Wurm has found 
it 20'* 47“ 9 S .64 — 0".72#. 
But Professor Wurm, to whose indefatigable exertions Geography is so much 
indebted, having calculated the occupations observed at Paramatta as far as 
he was in possession of them, and could identify the stars, I can do no better 
than gdve the results of his calculations in preference. The longitude de- 
duced from Spica, 23rd December, 1826, is alone, by my calculation, this 
observation not having been as yet communicated to Professor Wurm. It is 
