The Light-Variation of Eros.—Astr. Nach. 5784 contains two papers on this subject. S. Taffara, of Catania Observatory, discusses the period, finding the value 0.109796 day, which agrees exactly with that announced by L. Jacchia, of Bologna. Most observers take this value as the half-period, considering that the complete cycle contains two slightly dissimilar waves. The elongation observed at Johannesburg was stated to travel round in the double period 5 h. 16 m.