consider a system consisting of $N$ identical particles of unit mass confined to a spherical container of radius $R$ with reflecting walls. The particles interact via the attractive soft Coulomb pair potential $-(r^2+r_0^2)^{-1/2}$. Using a traditional convention for self-gravitating systems in which the equilibrium properties of such systems become universal, we define rescaled energy $\e$, inverse temperature $\b$, distance $x$, velocity $u$, and time $\t$ as $$\begin{aligned}
\label{def}
\nonumber
\e\equiv E{R\over N^2}\\
\nonumber
x\equiv{r\over R}\\
\b\equiv{N\over RT}\\
\nonumber
u \equiv v \sqrt{R \over N}\\
\nonumber
\t\equiv t {N^{1/2}\over R^{3/2}}.\end{aligned}$$ The unit of time, often referred to as crossing time, $[t]=\frac {R^{3/2}} {N^{1/2}}$, is obtained by dividing the unit of length $R$ by the unit of velocity $\sqrt{N/R}$. This unit of time is also proportional to the period of plasma oscillations in a medium with the charge concentration $N/R^3$. As this time unit has purely kinematic origin, we do not expect the evolution of systems having different $N$ and $R$ to be universal in time $\t$. The evolution, assuming that it is collisional, is expected to be universal in the relaxation time $\t_{r}=\t{\ln N\over N}$ [@bt], where the factor $N/ \ln N$ is proportional to the number of crossings a typical 