Radial Velocities and Spectral Types of 181 Dwarf Stars.

Spectral types and radial velocities have been determined for 181 dwarf stars having for the most part proper motions greater than O'~35'. The classification follows the Henry Draper system except that 21 subdwarfs have been recognized in types A, F, G, K, ar~d M. Emission lines of H and Caii (H and K) were observed in 41 stars, and of Caii alone in 24 other stars. The correlation between spectral type and absolute magnitude determined from trigonometric parallaxes is shown in Figure 1. If the subdwarfs are excluded, the average spread in luminosity is 1.6 mag