Spectral Types and Radial Velocities in the Galactic Cluster NGC 3293

112 spectra of 35 stars have been used for the determination of spectral types and 89 of these spectra for the determination of the radial velocities of 26 of the stars. The spectral types taken together with Dr T. E. Houck's. photometric measures show the H–R diagram expected for a young cluster. The stars are mainly of early B type with luminosity classes from V to Ib. An Mo lab star is almost certainly a cluster member. The radial velocities. show a dependence on magnitude (Fig. 3) which is large and unexplained. The Ca II interstellar lines are free of the effect, which may be possibly related to the Trumpler effect.