SATURN'S RINGS.—The January number of the Astrophysical Journal (vol. xxvii., No. i, p. 35) contains an article by Prof. Barnard in which he describes and discusses his recent observations of Saturn's rings with the 40-inch refractor of the Lick Observatory. On July 2, 1907, Prof. Barnard found that, although no direct sunlight was falling on its earthward side, the entire surface of the ring was distinctly visible. On each ansa were two prominent condensations symmetrically placed with respect to the ball. On October 4-when the earth again passed back to the shadow side of the ring-and for some days after, the ring was perfectly linear, and the condensations, which, if they were real masses on the ring system, should then have been best seen, had disappeared.