\def\@schapter#1{\if@twocolumn \@topnewpage[\@makeschapterhead{#1}]
 \else \@makeschapterhead{#1} 
 \@afterheading\fi}
\def\chapter{\clearpage 
 \global\@topnum\z@ 
 \@afterindenttrue 
 \secdef\@chapter\@schapter} 
\def\section{\@startsection {section}{1}{\z@}{-2.5ex plus 1ex minus 
 .2ex}{2.0ex plus .2ex}{\large\bf\raggedright}}
\def\subsection{\@startsection{subsection}{2}{\z@}{-2.5ex plus 1ex minus 
 .2ex}{1.2ex plus .2ex}{\large\bf\raggedright}}
\def\subsubsection{\@startsection{subsubsection}{3}{\z@}{-2.5ex plus
1ex minus .2ex}{1.2ex plus .2ex}{\normalsize\bf\raggedright}}
\def\paragraph{\@startsection
 {paragraph}{4}{\z@}{1.2 ex plus .2ex minus .2ex}{-1em}{\normalsize\bf}}
\def\subparagraph{\@startsection
 {subparagraph}{4}{\parindent}{1.2ex plus .2ex minus .2ex}{-1em}{\normalsize\bf}}
