Finite size scaling and equation of state for Ising lattices

Accurate Monte Carlo data from a set of isotherms near the critical point are analyzed using two RG based complementary representations, given respectively in terms of $\bar{h}=h\mathrm{/}\mid t{\mid }^{\beta \delta }$ and $\bar \tau=t/h^{1/\beta\delta}$. Scaling plots for data on simple cubic Ising lattices are compared with plots of $M{L}^{\beta \nu }$ vs. $\mid t\mid L^{1\mathrm{/}\nu }$ for increasing $L$ values and with high quality experimental data on $CrB{r}_3$. Finite size effects and the equation of state are discussed.