Photoelectric radial velocities, paper X. The orbits of four spectroscopic binaries in the clube Selected Areas.

Orbits are presented for four ninth-magnitude stars about which the only spectroscopic datum previously known is the HD type, K0 in each case. There is circumstantial evidence that all the stars are giants and that one of them (HD149240) has a hotter companion which should be detectable spectroscopically and photometrically.