The domain in the (U, V) plane of old-disk-population stars is defined by a sample of F- and G4ype stars brighter than visual magnitude 6.5 for which luminosities are available from intermediate-band photometry. The majority of these old-disk stars avoid the domain of the young-disk population in the (U, V) plane except for (1) several objects with V near - 17 km sec-1 and (2) a half dozen possible members of a solar group. The sample of stars used to define the old-disk population is confined to distances less than 100 parsecs from the sun and those with V near - 17 km sec-1 may represent several generations of the objects formed in what is now the solar neighborhood and which keep returning to this neighborhood because they are isoperiodic (V near - 17 km sec-1) with the local standard of rest. The half dozen possible members of a solar group indicate an evolutionary age of some 5 X 10 years. In addition to some of the previously recognized stellar groups in the old-disk population (e.g. Wolf 630 and Her), a new group with U = + 40 to + 50 km sec-1 and V = - 36 km sec-1 is also discussed. The sample of red giants: (VE and (R- I)o > + 0"'42) contains eight probable members of the halo population of which five are members of the Arcturus group. Possible structure in the old-disk-population giant sequence is discussed on the basis of published narrow-band indices, and the luminosity functions of the old-and the youngdisk-population red giants are compared. Key words: old-disk population - space motions - red-giant stars