THE 

 LONDON, EDINBURGH and DUBLIN 



PHILOSOPHICAL MAGAZINE 



AND 



JOURNAL OF SCIENCE. 



♦ 



[THIRD SERIES.] 



DECEMBER 1845. 



LXIV. On the Comets isohich have been discovered since July 

 1844. By J. R. Hind, Esq. 



To the Editors.qf the Philosophical Magazine and Journal. 

 Gentlemen, 



I HAVE prepared, at the request of Mr. Bishop, a few re- 

 marks on the comets which have recently appeared, and 

 I forward them in the hope that they may be found useful to 

 those who desire information on the subject without possessing 

 the various astronomical publications in which it is generally 

 to be found. 



I also avail myself of the present opportunity to inclose you 

 some results which I have lately obtained for early comets, by 

 means of the Chinese Astronomical Annals. 



I have the honour to be, Gentlemen, 



Your most obedient Servant, 

 J. R. Hind. 



On the night of July 7, 1844, M. Mauvais discovered a 

 telescopic comet in the constellation Hercules: it was de- 

 tected at Berlin by M. d' Arrest on the 9th. During the 

 month of August this comet was easily observable ; it pre- 

 sented a fine round nebulosity with a lucid point about the 

 centre, and was distinctly seen in the strong twilight. It was 

 followed by European astronomers until the second week in 

 September, when it became invisible from proximity to the 

 sun. Within ten days after perihelion passage (October 17), 

 Mr. Mann rediscovered it at the Royal Observatory, Cape of 

 Good Hope, with the assistance of an ephemeris calculated 

 by M. Nicolai, and forwarded to the colony by the Astrono- 

 mer Royal. ■ From this time until March 10, Mr. Mann ob- 

 served it most indefatigably ; and he has furnished us with a 

 series of measures which will prove of the greatest value in 



Phil. Mag. S. 3. Vol. 27. No. 182. Dec. 1845. 2 E 



