%-----------------------------------------------------------------
% \begin{narrow}{1.0in}{0.5in}   produces text which is narrowed
%          by 1.0 on left margin and 0.5 inches on right margin
% \begin{narrow}{-1.0in}{-0.5in} produces text which is widened
%          by 1.0 on left margin and 0.5 inches on right margin
% Narrow environments can be nested and are ended by \end{narrow}
%-----------------------------------------------------------------
\newenvironment{narrow}[2]{%
 \begin{list}{}{%
  \setlength{\topsep}{0pt}%
  \setlength{\leftmargin}{#1}%
  \setlength{\rightmargin}{#2}%
  \setlength{\listparindent}{\parindent}%
  \setlength{\itemindent}{\parindent}%
  \setlength{\parsep}{\parskip}%
 }%
\item[]}{\end{list}}
\end{narrow}