-Mike
mikus @ leland.stanford.edu
Why don't you just type NH$_3$?
That's the way I type formulae:
--CH$_2$--CH$_2$--N$^+$(CH$_3$)$_3$
The "3" won't be in bold face type, I know but maybe that's ok.
Bye
Daniel
I haven't got the original question yet, but for chemical literature,
and for most mathematical literature I'd argue, the section titles
should use \boldmath in addition to \bf.
\newcommand{\section}{\@startsection {section}{1}{\z@}%
{-3ex \@plus -1ex \@minus -.2ex}%
{2ex \@plus.2ex}%
{\normalfont\Large\sffamily\bfseries\boldmath\raggedright}}
Donald Arseneau as...@triumf.ca