Inserting images in LaTeX

% With 28.6 pixels per cm in my screengrabs, use px / 28.6 to get viewport dimensions.

\begin{figure}[htbp]
\begin{center}
\mbox{
%\subfigure[a] { \fbox{
\includegraphics[natwidth=10cm,scale=0.2,clip=true,
% Use pixels / 28.9:
viewport=0cm 0cm 12cm 12.5cm] % edges cut from default plot size.
{m94acou1a_mesh} } %} }

\caption{The mesh used to test the effect of the damping face, on the impedance of
the drive face.}
\label{fig:m94acou1a_mesh} \end{center} \end{figure}