  The non-equilibrium dynamics of the model 3d-Ising spin glass
  - Fe$_{0.55}$Mn$_{0.45}$TiO$_3$ - has been investigated from the temperature
and time dependence of the zero field cooled magnetization recorded under
certain thermal protocols. The results manifest chaos, rejuvenation and memory
features of the equilibrating spin configuration that are very similar to those
observed in corresponding studies of the archetypal RKKY spin glass Ag(Mn). The
sample is rapidly cooled in zero magnetic field, and the magnetization recorded
on re-heating. When a stop at constant temperature $T_s$ is made during the
cooling, the system evolves toward its equilibrium state at this temperature.
The equilibrated state established during the stop becomes frozen in on further
cooling and is retrieved on re-heating. The memory of the aging at $T_s$ is not
affected by a second stop at a lower temperature
  $T'_s$. Reciprocally, the first equilibration at $T_s$ has no influence on
the relaxation at $T'_s$, as expected within the droplet model for domain
growth in a chaotic landscape.
