Radial-Velocity Variations in Four Short-Period Variable Stars.

Complete radial-velocity-curves have been obtained with the Cassegrain spectrograph of the Mount Wilson 60-inch telescope. Conspicuous variations in the velocity amplitude are not found The velocitycurves of two of the stars cannot be represented as mirror images of the published light-curves Integrated velocity-curves show a variation from star to star in the fraction of the period spent near maximum radius. Spectrum variations are discussed by comparisons with MK standards