WOLF'S COMET.-A Copenhagen telegram announces that Prof. Wolf succeeded in photographing this very faint comet again on January 13, at 17h 58.5m G.M.T. (new), its position for 1925 being R.A. 4h 4m 48-os, N. Decl. 20° 14′ 54″. The Right Ascension was about im ay5 less than Kahrstedt's ephemeris, the Decl. 12' greater. The orbit elements therefore need considerable modification, but there has not yet been time to do this. The magnitude had declined from 16 to 17, so it is to be feared that the object will not be visible for very long.