THE VARIABLE STAR, β PERSEI (ALGOL).—Herr Julius Schmidt, Director of the Observatory at Athens, publishes in the Astronomische Nachrichten the results of observations on the times of minima of this variable star, extending from August 1846 to November 1875. The epochs are given in Paris mean time with correction for the light-equation. The probable error of a single determination of the time of minimum from 183 observations by Schmidt is ± 8.0 minutes; fifty observations of Arge-lander gave a probable error of ± 6.0 minutes, and fifty-five observations of Schönfeid, one of ± 4.6 minutes, showing by a mean of the 288 observations a probable error of ± 7.0 minutes. The period assumed by Schmidt in the discussion of his Algol observations between 1840–1875 is 2d. 20h. 48m. 53.6s.