\documentclass[leqno]{book}
\usepackage[T1]{fontenc}
\usepackage{amssymb}
\let\le\leqslant
\let\ge\geqslant
\usepackage{french,mep}
\fontfamily{knb9}\selectfont
\renewcommand\rmdefault{knb9}
\usepackage[baskerville]{mathfont} 
\newcommand{\point}{\raisebox{.5ex}{.}}
\def\Tfont{kbd}
\begin{document} 
\guillemetsinallfonts   
\input cart.txt
\end{document}
