On the Color-Magnitude Diagram of the Pleiades.

A series of photoelectric observations of colors and magnitudes of 61 of the brightest members of the Pleiades is given. The observations were made with the 82- and 13-inch reflectors of the McDonald Observatory. A color-magnitude diagram from the new data is illustrated. The stars fall along a single, rather broad sequence having a sharp upturn for the brightest members; the McDonald observations do not confirm the fine strncture found by Eggen. Attention is called to the desirability of further observations.