88 
No. Year. 
Astronomical and Nautical Collections. 
(Zeitschrift fiir Astr. 1818), in which all the observations are 
collected and discussed. The first orbit of Encke is the para- 
bola which agrees best with the observations. The longi- 
ee are reckoned from the mean equinox of the 15th Decem- 
er, 1680. 
(15.) 1682. Halley's comet: observed from 25th August to 19th September. 
37. 
38. 
39. 
40. 
4). 
42, 
43. 
44, 
45. 
4s. 
A9. 
Flamst. H. C. Br. I. p..108. Hevel. Ann. Climact. p. 120. 
Halley in Tab. Astr. de mot. com. ellipt. 
1683. According to Flamstead’s observations, from the 23d July to 
the 5th Sept. Flamst. p. 110. 
1684, According to Bianchini’s observations, from the Ist to the 17th 
July. Phil. Tr. N. 169, p. 920. Acta erud. 1685. p.241. 
1686. Seen first in August in the East Indies, then in September, in 
Europe. Orbit not very certain. Pingré II. p. 28. i 
1689. Very uncertain observations, Pingré IL. p. 29. » 
1695. Burckhardt computed his orbit from manuscript observations 
left by Delisle in the Dépdt de la Marine.. What was before 
known of this comet Pingré has collected. p. 33. Conn. des 
tems, 1817, p. 278... : 
1698. The observations of Lahire and Cassini, the only ones that we 
have of this comet, are deficient in accuracy. Anc. Mém. II. 
p- 341, X. p.'742.. Mém. 1701, p. 117. 
1699. Observed by Fontenay at Pekin, and by Cassini and Maraldi 
at Paris. The observations extend from the 17th February 
to the 2d March. Mem. Par. 1701, p. 47. 
1701. From observations made by P. Pallu at Pau, which had lately 
been recovered, and from the observations of P. Thomas, at 
Pekin. Conn. des tems, 1811, p. 482.. Noel Obs. Phys. 
Math. in India fact. p. 128. 
1702. The observations between the 20th April and the 5th May not 
very exact, Struyck, 1753, p. 50. Pingré II. p. 38. Mem, 
Inst. UH. p. 28. Mon. Cor. XVI. p. 511. 
- 1706. Cassini and Maraldi, from the 18th March to the 16th April. 
Mem. Par. 1706, p. 91, 148. Pingreé IL, 39, Struyck, 1753, 
5 
p. 54. 
. 1707. The observations extend from the 25th. November to the 23d 
January, 1708. Mem, Par. 1707, p. 58S, and 1708, p. 89, 
323. On the orbits see Pingré Li. p. 40. Struyek, 1753, p. 54. 
The orbit of Hottuyn, given imperfectly by Struyck himself, 
depends only on a construction. 
1718, From Kirch’s observations, which are not particularly accurate. 
Misc. Ber. III. p. 200. Phil. Trans. XXX. XXXII. Pingré 
II. p. 41.  Struyck Inleiding de Algemeene Geographie, 
p: 295. Struyck, 1753, p. 57. 
1723. Was seen in the East Indies as early as the 12th October. The 
orbits are principally founded on the observations made be- 
tween the 20th October and the 18th December by Halley, 
Bradley, Pound, and Graham. Phil. Trans. XXXII. n. 382, 
_p. 41, n. 897, p. 223. The second orbit, ascribed to Struyck, 
is only found in the astronomical tables of Berlin. Pingre If. 
-p. 42. Burckhardt’s hyperbolic. orbit. . Conn. des tems, 
182i. 
1729, Discovered by Father Sarabat the 31st July, 1729, and observed 
until the 18th Jan. 1730. Pingreé IL. p. 42, Struyck, 1740, p. 
