%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 8-1-6 on page 518.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{135.83385pt}

\StartShownPreambleCommands
\usepackage{isotope}
\StopShownPreambleCommands
\begin{document}
\begin{flushleft}
\isotope[207][83]{Bi} and \isotope[60][29]{Co} \\[1ex]
\renewcommand{\isotopestyle}{\sf}% sans-serif
\isotope[207][83]{Bi} and \isotope[60][29]{Co}
\end{flushleft}
\end{document}