deletions | additions       diff --git a/Mixing work.tex b/Mixing work.tex  index 36938f0..c3d2a71 100644  --- a/Mixing work.tex  +++ b/Mixing work.tex 
...
\end{enumerate}  {\bf  To do: do:}  \begin{itemize}  \item Extension beyond ideal gas? -- Hard, and perhaps not much to learn from the exercise.   \end{itemize}