THE ASTRONOMICAL JOURNAL    VOLUME 107, NUMBER 6, PAGE 2240           JUNE 1994

           A SURVEY OF PROPER MOTION STARS. XII. AN EXPANDED SAMPLE

                                BRUCE W. CARNEY

      Department of Physics and Astronomy, University of North Carolina,
                    Chapel Hill, North Carolina 27599-3255
                  Electronic mail: bruce@sloth.astro.unc.edu

                                DAVID W. LATHAM

        Harvard-Smithsonian Center for Astrophysics, 60 Garden Street,
                        Cambridge, Massachusetts 02138
                    Electronic mail: latham@cfa.harvard.edu

                                 JOHN B. LAIRD

     Department of Physics and Astronomy, Bowling Green State University,
                           Bowling Green, Ohio 43403
                     Electronic mail: laird@tycho.bgsu.edu

                                LUIS A. AGUILAR

  Observatorio Astronomico Nacional, Apdo. Postal 877, Ensenada, B.C., Mexico
              Electronic mail: aguilar@bufadora.astrosen.unam.mx


                                   ABSTRACT
    
    We report new photometry and radial velocities for almost 500 stars
    from the Lowell Proper Motion Catalog.  We combine these results with
    our prior sample and rederive stellar temperatures based on the
    photometry, reddening, metallicities (using Chi^2 matching of our
    22,500 low S/N high resolution echelle spectra with a grid of synthetic
    spectra), distances, space motions, and Galactic orbital parameters for
    1269 (kinematics) and 1261 (metallicity) of the 1464 stars in the
    complete survey.  The frequency of spectroscopic binaries for the
    metal-poor ([m/H] <= -1.2) stars with periods shorter than 3000 days is
    at least 15%.  The spectroscopic binary frequency for metal-rich stars
    ([m/H] > -0.5) appears to be lower, about 9%, but this may be a
    selection effect.  We also discuss special classes of stars, including
    treatment of the double-lined spectroscopic binaries, and
    identification of subgiants.  Four possible new members of the class of
    field blue stragglers are noted.  We point out the detection of three
    possible new white dwarfs, six broad-lined (binary) systems, and
    discuss briefly the three already known nitrogen-rich halo dwarfs.  The
    primary result of this paper, Table 6, will be available on CD-ROM, in
    the form of a much larger table from which it was drawn.