  Aging in a single crystal spin glass ($\mathrm{Cu}_{0.92}\mathrm{Mn}_{0.08}$)
has been measured using ac susceptibility techniques over a temperature range
of $0.3 - 0.8 \, T_g$. In these studies, traditional aging experiments (or
``quench'' aging protocols) are compared to aging curves constructed from
finite-cooling-rate curves. By comparing the growth rates of spin glass order
between the two types of aging curves, it is determined that quantitative
comparisons between protocols which are taken by quenching and protocols using
a finite cooling rate are not possible without a deeper understanding of the
interplay between aging and rejuvenation. We then demonstrate that the data
presented indicate that rejuvenation, rather than cumulative aging, is the
cause for the discrepancies between the two growth rates.
