Data obtained in the near-equatorial magnetosphere, between L=3 and R=23 RE, by the plasma composition experiment on ISEE-1 are examined for possible effects of varying solar activity, as measured by the daily F 10.7 index. The data consist of velocity moments for H+, He++, He+, and O+ ions, primarily number densities and mean energies, integrated over the 0.1- to 16-keV/e energy range. These are grouped into four ranges of F 10.7, less than 100, 100 to 150, 150 to 200, and greater than 200, using two methods. In one the data are averaged over geomagnetic activity, in the other the data are restricted to times of AE1 cm-3). Both species show a decreasing energy with increasing F 10.7 at R7 and appears to have both solar and terrestrial origins. It does not show a strong increase in density anywhere, however. In the plasma sheet it actually decreases slightly with increasing F 10.7 (about 25% over the full range of the F 10.7), an effect that is ascribed in part to a known variation of the solar wind proton density and in part to the apparent tendency of the plasma sheet to maintain a constant total pressure (including all ion species). At low L the H+ density appears to be dominated by a terrestrial source, but shows little or no increase with the F 10.7, suggesting that this source is essentially saturated with respect to the EUV (F'10.7>80). ¿ American Geophysical Union 1989