begin{figure}
centering

psfrag{k}[][]{$k$}

psfrag{y}[][]{$Y^{prime }$}

psfrag{x}[][]{$X^{prime }$}

psfrag{n}[][]{}

psfrag{r}[][]{$O$}

psfrag{a}[][]{$x$}

psfrag{c}[][]{$y$}

psfrag{m}[][]{$M$}

psfrag{h}[][]{$;dfrac{1}{k}$}

includegraphics[width=0.4textwidth]{fig3.eps}

caption{The flow near the leading edge of a thin aerofoil.}

label{fig3_ms}
end{figure}