Further Note on the Distribution of the Longitude of Periastron.

The distribution of w, the longitude of periastron, was analyzed for 85 eclipsing and 330 nonedipsin~ spectroscopic binaries listed in the Fifth Catalogue as having effiptic orbits. The analysis was performec separately for various categories of binaries obtained from classifications and cross-classifications accord ing to spectral class, semi-amplitude, period, and eccentricity. In general, the results of the analyses ar consistent with the Struve hypothesis that the catalogue values of w are distorted by systematic error~ due to some phenomenon occurring in the vicinity of the binary. However, some curious results were ob- tained. The most striking of these is that there is strong evidence of nonuniformity in the distribution o~ ~ among binaries with period from 2 to 5 days, while there is no such evidence for binaries with period shorter than 2 days