38S Scientific Intelligence. 
more distant than u Lyrae. The following are the results ob^ 
tained by Dr Brinkley : 
Maximum 
Solar Nutation. 
Parallax. 
« Lyrae, 
-h 0".5055 
2".276 
y Draconis, 
4 0.4246 
0 .141 
jj Urs. Maj. 
4 0 .5782 
0.190 
« Cygni, 
4 0 .5572 
1 .000 
Arcturus, 
4 0 ,4430 
1 .305 
Dr BrmTdey's Elements of the Comet ^1821 This inter- 
esting comet, which had been observed in Europe (see this vo- 
lume, p. 174.), before it passed its perihelion, was fortunately 
observed by Captain Basil Hall, Lieutenant Robertson, and Mr 
Forster of H. M. S. Conway, at Valparaiso, after it had passed 
its perihelion. 
That eminent astronomer, the Reverend Dr Brinkley of Dub- 
lin, to whom Captain Hall’s observations were communicated, 
found that the computation of its elements was involved in dif- 
ficulties not often experienced, in consequence of the observations 
having been made after its passage of the perihelion, and in 
consequence of the smallness of the perihelion distance, and 
some other circumstances. He had therefore recourse to an im- 
proved method of computation, which he has explained in the 
Philosophical Transactions for 1822, Part I. p. 58. 
By this method he obtained the following elements : 
Passage of Perihelion, Mean Time at Greenwich, March 21 . 
Perihelion distance, - - - 
Inclination of orbit, 
Place of ascending node, 
Place of perihelion, - - ^ 
Motion retrograde® 
After these elements were calculated. Dr Brinkley obtained the 
following new elements, by using Dr Giber’s observations of Ja- 
nuary 30. and those of Captain Hall of April 8. and May 3. 
Passage of perihelion, March 21. ... - 
Perihelion distance, - - - - .091677 
Inclination of orbit, - - - f 73h 34' 53" 
Place of node, - ----- 48“ 42' 18" 
13h 15' 47" 
.092800 
73“ 15' 48" 
P 18 24 41 
7 29 6 47 
Place of perihelion, 
7* 29 30 33 
Between January 21. and May 3. the comet described 
above 800® about the sun, and as a parabola represenits the ob- 
