SOUTHERN COMETS.—Dr. Oppenheim of Berlin has pub lished elements of the comet discovered by Mr. Ross of Elstern-wick, Victoria, on January 7, founded upon the Melbourne observations in Astron. Nach., No. 2579, though, as he remarks, they were calculated with difficulty, owing to the existence of three oversights in the seven positions there given; hence their connection for an orbit would involve a troublesome tentative process. The position for January 17 is in error nearly two degrees.