Index: mttroot/mtt/lib/comp/compound/Thermal/CompressibleFlow/Poly/Poly_desc.tex
==================================================================
--- mttroot/mtt/lib/comp/compound/Thermal/CompressibleFlow/Poly/Poly_desc.tex
+++ mttroot/mtt/lib/comp/compound/Thermal/CompressibleFlow/Poly/Poly_desc.tex
@@ -5,10 +5,13 @@
 % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % %% Version control history
 % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % %% $Id$
 % %% $Log$
+% %% Revision 1.1  1998/03/26 15:13:35  peterg
+% %% Initial revision
+% %%
 % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
    The acausal bond graph of system \textbf{Poly} is
    displayed in Figure \Ref{Poly_abg} and its label
    file is listed in Section \Ref{sec:Poly_lbl}.
@@ -18,5 +21,9 @@
 \begin{equation}
   T_2 = T_1 \left ( \frac{P_2}{P_1} \right )^\alpha
 \end{equation}
 where $\alpha = \frac{n-1}{n}$ and $n$ is the coefficient of
 polytropic expansion.
+
+The output is \emph{bicausal} and also imposes a zero flow. This is
+implemented using the bicausal \textbf{SS} component labeled ``zero''.
+