\begin{table}%t5
\caption{\label{tab:pca}Comparison of measured PCA scaling slopes.}
%\centering
\par
\begin{tabular}{lccccc}
\hline
\hline\noalign{\smallskip}
\hspace{3.5cm} & $1024^3$ sol & $1024^3$ comp & \object{Rosette Zone I}\tablefootmark{a} & \object{Rosette Zone II}\tablefootmark{b} & \object{G216-2.5}\tablefootmark{c}  \\
\hline
$\alpha_{\rm ~PCA}$~\mydotfill & $0.66\pm0.05$ & $0.76\pm0.09$ & ~ & ~ & ~\\
$\alpha_{\rm ~PCA}$ from $^{12}$CO(1--0)~\mydotfill & ~ & ~ & $0.79\pm0.06$ & $0.66\pm0.06$ & $0.63\pm0.04$\\
$\alpha_{\rm ~PCA}$ from $^{13}$CO(1--0)~\mydotfill & ~ & ~ & $0.86\pm0.09$ & $0.67\pm0.12$ & $0.56\pm0.02$\\
\hline
\end{tabular}
\tablefoot {\tablefoottext{a}{PCA by \citet{HeyerWilliamsBrunt2006} of the interior of an HII~region in the \object{Rosette~MC};} 
\tablefoottext{b}{same as $^a$, but exterior of the HII~region;} 
\tablefoottext{c}{PCA by \citet{HeyerWilliamsBrunt2006} for \object{G216-2.5} (\object{Maddalenas's Cloud}).}}
\vspace*{3mm}
\end{table}