  Inclusive electron scattering data are presented for ^2H and Fe targets at an
incident electron energy of 4.045 GeV for a range of momentum transfers from
Q^2 = 1 to 7 (GeV/c)^2. Data were taken at Jefferson Laboratory for low values
of energy loss, corresponding to values of Bjorken x greater than or near 1.
The structure functions do not show scaling in x in this range, where inelastic
scattering is not expected to dominate the cross section. The data do show
scaling, however, in the Nachtmann variable \xi. This scaling may be the result
of Bloom Gilman duality in the nucleon structure function combined with the
Fermi motion of the nucleons in the nucleus. The resulting extension of scaling
to larger values of \xi opens up the possibility of accessing nuclear structure
functions in the high-x region at lower values of Q^2 than previously believed.
