Royal Astronomical Society, 839 



M^ D' Arrest gave information of his discovery of the comet to 

 Professor Encke, on the night of July 9, and furnished a position of 

 it, from a good series of observations : he gave also its daily motion 

 deduced approximately from a motion of 50' in right ascension, and 

 20' in declination. 



IV. Astronomical Observations made at Hudson Observatory, 

 United States, in longitude 5^* 25™ 39**5 west, and latitude 

 41° 14' 42"-6 north. By Elias Loomis, Esq. Communicated by 

 Lieutenant- Colonel Sabine. 



The observations contained in this paper were principally made 

 with a circulsir micrometer attached to the equatorial : they consist 

 of— 



1 . Observations of Encke's Comet on nine days, from March 28 

 to April 11, 1842. 



2. Observations of the Great Comet of 1843 on six days, from 

 March 11 to April 6, 1843. 



3. Observations of Mauvais' First Comet on twenty-five days, 

 from July 30 to October 1, 1843. 



4. Observations of Faye's Comet on three days, January 23, 

 February 10 and 11, 1844. 



For further information on these observations we refer to the 

 Society's Monthly Notices, vol. vi. No. 11. 



V. Two Communications from the late Professor Henderson, con- 

 taining Elements and an Ephemeris of Mauvais' Second Comet. 



VI. Observations of Mauvais' Second Comet, made at Starfield, 

 by W. Lassell, Esq. Stated in the Monthly Notices, as already re- 

 ferred to. 



VII. Observations of Mauvais' Second Comet and DeVico's 

 Comet, and of an Occultation of a fixed Star by the Moon, made by 

 C. Rumker, Esq. at Hamburg. Communicated by Dr. Lee. Given 

 in the Monthly Notices. 



From the observations made at Berlin, on September 5 and Sep- 

 tember 8, and the observation at Hamburg of September 13, M. 

 Funk, assistant to M. Rumker, has computed the following ele- 

 ments : — 



Perihelion passage, Sept. 2, 10" 19"° 49% Greenwich mean solar time. 



o / // 



Longitude of perihelion 342 56 30 



Longitude of ascending node 62 8 44 



Inclination 4 5 48 



Logarithm of perihelion distance ...... 0* 106221 6 



Motion direct. 



Observation of the Occultation of «Tauri by the Moon on Sep- 

 tember 4, 1844. 



b m s 



Hamburg mean solar time of immersion . . 13.39 8*5 

 emersion ... 14 36 15*3 



VIII. Observations of De Vico's Comet, made at Aylesbury by 

 Thomas Dell, Esq. Communicated by Dr. Lee. See Monthly 

 Notices. 



