IV. 



April and the 28th of September ; of the moon on the 20th of 

 March and the 13th of September. 



But the most remarkable phenomenon of the present year is 

 the comet discovered by M. Encke, which will be couspicuoas 

 all January and part of February. 



The Comet in question will furnish matter for some curious 

 speculations on the construcliou of the Solar System : it is one of 

 those very rare Comets whose orbit, an ellipse of no very great 

 eccentricity, lies within the orbit of Jupiter, and it has a short 

 period of little more than three years and five months. It ap- 

 peared about forty two years ago. Its period has been deter- 

 mined. Dr. Olbers, of Bremen, who has accurately watched it, 

 seems to be of opinion, as it is said, that it shines by Reflected 

 Light, a circumstance exceedingly curious if it turn out to be 

 true, as it would afford a connecting link between the Comets and 

 Planets. Indeed the discovery of Jnno, Pallas, Ceres, and Vesta, 

 between the orbits of Mars and Jupiter, seems to encourage a 

 hope that yet other bodies may be discovered, both with direct 

 and reverse orbits, as component parts of our system. — The 

 present Comet was predicted and seen in 1795, 1799, and must 

 have returned Nov. 7, 1802, 1805, 1809, 1812, 1815, 1818, 1822, 

 and 1825, in which latter year it was twice seen. 



From an interesting pamphlet by Mr. Stephen Lee, we shall 

 take the liberty of extracting the following particulars :— The 

 Comet was recognized distinctly and identified in 1805 by MM. 

 Bouvard, Pons, and llerschel, the former first saw it on the 20th 

 of October of that year, in Ursa Major, appearing like a star of 

 the 4th magnitude, with a nucleus and faint tail of two minutes 

 and a half in length. It passed through its perihelion on the 21st 

 of November of the same year. On the 20th of November, 1818, 

 it was again seen in the neck of Pegasus, and passed its perihelion 

 January 27, 1819. M. Encke then determined its Elliptical 

 Orbit, and foretold its return in 1822, in which year it was fortu- 

 nately seen by M. Ilumker, in New South Wales, and it .passed 

 its pedhelion on the 23d of May. M. Encke predicted its return 

 again in 1825, and it was in that year observed on the 15th of 

 August, near Pollux, and it was viewed by M. Pons, at Mar- 

 seilles ; it passed its perihelion on the 15th of September. The 

 observations of M. Encke in that year enabled him to determine 

 its elements with more accuracy. Some of the results are as 

 follow :~Mean Anomaly 1829 Jan. 9, 72. Mean Time at Paris, 

 2 seconds 83. Mean daily siderial motion, 1069. 87572. Longi- 

 tude of the Perihelion, 157 degrees, 17 minutes, 26 seconds. 

 Longitude of Ascending Node, 334. 28. 47. 1. Inclination of 

 Orbit, 13. 20. 47. 9. Angle of Eccentricity, 57. 38. 25. 2, 

 Motion direct. 



A great Comet, called Halley's Comet, is expected in 1833.4. 



