Astronomical and Nautical Collections. 9] 
No, Year. : 
dias seilles till the 17th July. The orbit appears, according to the 
investigations of Burckhardt and of Encke, to be truly hyper- 
bolical. The parabola. of Encke, however, affords also 
: results varying but little from the truth. Mon. Corr..X. 
p- 510. Conn. des tems XIII. p. 344, Von Zach Corresp. 
astr. 1820, Encke reckons from the mean equinox, Ist Jan. 
1771. 
‘74, 1772. Discovered by Montaigne the Sth March, observed by Messier 
four times only, the 26th, 27th, and 30th March, and the 1st 
April. The computation of the elliptic orbits was undertaken 
on account of the similarity of the elements of the second 
&, comet of 1805. These more correct investigations render 
the identity of the two comets highly improbable, and it is 
accordingly rejected by Bessel, as well as by Burckhardt, who 
was able to employ the rediscovered observations of Mon-~ 
taigne. Mon. Corr. XIV. p. 73, 84. Conn. des tems 1811, 
- 486. K 
75. 1778. Dieddwerceh by Messier the 12th Oct. 1773, and observed until 
“A the 14th Apr. 1774. Burckhardt, who employed also obser- 
vations of St. Jaques de Silvabelle, found the orbit not 
sensibly different from a parabola. Mém. Par. 1774—1777. 
Acta Petr. 1779, p. 335. Conn. des tems XIII. p, 343. Mon. 
ie Corr. X. p. 540. 
76. 1774, Discovered by Montaigne the 11th Aug. observed till the 25th 
Oct. Mem. Par. 1775, p. 445. Conn. des tems 1821. 
77. 1779. Discovered by Bode the 6th Jan. observed till the 17th May. 
Mem. Par. 1779, p. 318. Pingré, IL. p. 94, seems to prefer 
the orbit of Dangos before the rest. 
78. 1780. Discovered by Messier the 27th Oct. and observed till the 
29th Nov. Mém. Par. 1780, p.515. Act. Petr. 1780, p. ii. 
p. 347. Berl. Astr. Jahrb, 1784, p. 141. 
79. 1780. Discovered the 18th Oct. by Montaigne and Olbers, and ob- 
served very imperfectly three times only. The elements are 
therefore very uncertain. Mém, Par. 1780, p. 515. Berl. 
Astr. Jahrb. 1804, p. 172. 
80, 1781. Discovered by Méchain the 28th June, observed till the 15th 
July. Mém. Par. 1781, p. 349; 1782, p. 581. Berl. Astr. 
Jahrb. 1785, p. 166. 
$1. 1781. Discovered by Méchain the 9th Oct. observed till the 25th Dec. 
Mém. Par. 1781, p. 360; 1782, p.587. Legendre Nouv. 
Méthode, p. 41. 
82. 1783. Discovered by Pigott the 20th Nov. observed till the 21st Dec. 
Mém., Par. 1783, p. 123, 648, Phil.tr. LXXIV. Conn. des 
tems 1788. But respecting Burckhardt’s orbit, sec especially 
beaten Conn. des tems 1820, p. 305. ; 
‘83. 1784, Seen by Dela Nux at the Isle of Bourbon the 15th Dec. 1783, 
in Paris not till the 24th January, and observed there till the 
11th March, Afterwards it was again visible, and observed 
from the 9th to the 26th of May. Mém. Par. 1784, p. 313, 
358. The first elements are the most correct. 
The comet hitherto inserted in the tables, as the second of 
1784, is a shameful forgery of the Chevalier Dangos, as Pro- 
ad fessor Encke has shown in the Corresp. Ast. for 1820. Cah. v. 
p- 456. ™ ‘A ' - 
