ORBITS OF NEW SPECTROSCOPIC COMPONENTS IN 7 MULTIPLE SYSTEMS

New close sub-systems are discovered in wide physical multiple stars. Elements of spectroscopic orbits are given for the components of quadr uple systems ADS 1315C, 3608C, 3824C, 3991A and for the components of triple systems ADS 1849A, 6646A, 8861A. Physical parameters (magnitude s, spectral types, masses of individual components, distances to the s ystems, angular separations) are estimated by combining all available data. The nearby M dwarf ADS 8861A = Gliese 507A is a good candidate f or speckle resolution. The very hot white dwarf discovered by Hodgkin et al. (1993) is likely to be an additional visual component to ADS 38 24C, so this system may be quintuple; however, a search of 2.(d)993 ph otometric periodicity possibly caused by the hot close companion is hi ghly desirable.