   \if@twocolumn \textwidth175mm \marginparsep2.5mm 
                 \oddsidemargin-7.9mm \evensidemargin-7.9mm
   \else  \ifcase \@ptsize\relax
          \textwidth146mm \oddsidemargin7.1mm  \evensidemargin7.1mm \or 
          \textwidth154mm \oddsidemargin2.6mm  \evensidemargin2.6mm \or
          \textwidth164mm \oddsidemargin-2.4mm \evensidemargin-2.4mm \fi
          \marginparsep4mm \fi
   \ifcase \@ptsize\relax \textheight 59\baselineskip  \or
                          \textheight 52\baselineskip  \or 
                          \textheight 49\baselineskip  \fi
   \addtolength{\textheight}{\topskip} \topmargin-15mm
