$\begin{figure} \par\includegraphics[width=7.7cm,clip]{3121fg2a.eps}\vspace*{3mm} \includegraphics[width=7.7cm,clip]{3121fg2b.eps}\end{figure}$ Figure 2: Difference images of mass density spatial profiles evaluated over two different intervals of time: $\varrho(t=240~{\rm s})-\varrho(t=0)$ ( upper panel) and $\varrho(t=460~{\rm s})-\varrho(t=240~{\rm s})$ ( lower panel).
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In the text

$\begin{figure} \par\includegraphics[width=6.5cm,clip]{3121fg3a.eps}\vspace*{5mm} \includegraphics[width=6.5cm,clip]{3121fg3b.eps}\end{figure}$ Figure 3: Solid lines denote the position of the loop apex a) and mass density at the loop apex b) vs. time. Dotted lines correspond to damped sine functions fitted to the solid lines.
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In the text

$\begin{figure} \par\includegraphics[width=6.8cm,clip]{3121fig6.eps}\end{figure}$ Figure 6: Short period oscillations of mass density at the loop apex (solid line) and half-width of the loop (dashed line) at the apex vs. time. These oscillations are obtained from Figs. 3b and 5 by filtering out long period oscillations.
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In the text

$\begin{figure} \par\includegraphics[width=7cm,clip]{3121fig1.eps}\end{figure}$	Figure 1: Time-signature of the mass density (colour) at the apex of the loop.
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$\begin{figure} \par\includegraphics[width=7.7cm,clip]{3121fg2a.eps}\vspace*{3mm} \includegraphics[width=7.7cm,clip]{3121fg2b.eps}\end{figure}$	Figure 2: Difference images of mass density spatial profiles evaluated over two different intervals of time: $\varrho(t=240~{\rm s})-\varrho(t=0)$ ( upper panel) and $\varrho(t=460~{\rm s})-\varrho(t=240~{\rm s})$ ( lower panel).
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$\begin{figure} \par\includegraphics[width=6.5cm,clip]{3121fg3a.eps}\vspace*{5mm} \includegraphics[width=6.5cm,clip]{3121fg3b.eps}\end{figure}$	Figure 3: Solid lines denote the position of the loop apex a) and mass density at the loop apex b) vs. time. Dotted lines correspond to damped sine functions fitted to the solid lines.
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$\begin{figure} \par\includegraphics[width=7.2cm,clip]{3121fig4.eps}\end{figure}$	Figure 4: Time-signature of the vertical component of the flow for the same cut as shown in Fig. 1.
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$\begin{figure} \par\includegraphics[width=7.25cm,clip]{3121fig5.eps}\end{figure}$	Figure 5: Half-width of the loop at the apex vs. time.
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$\begin{figure} \par\includegraphics[width=6.8cm,clip]{3121fig6.eps}\end{figure}$	Figure 6: Short period oscillations of mass density at the loop apex (solid line) and half-width of the loop (dashed line) at the apex vs. time. These oscillations are obtained from Figs. 3b and 5 by filtering out long period oscillations.
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