%%
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%%
%%  Example 6-3-20 on page 375.
%%
%%  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{207.83385pt}
\StartShownPreambleCommands
\usepackage{pstricks,pst-tree}    \SpecialCoor
\StopShownPreambleCommands
\begin{document}
 \pstree[treemode=R,levelsep=*1cm]{%
     \Tr{Friedrich Wilhelm\rnode{A}{}}}{%
         \pstree{\Tr{Friedrich I.}}{%
             \Tr{Friedrich Wilhelm I.}   \Tr{Friedrich}}
     \pstree{\Tr{\rnode{B1}{}Albrecht Friedrich\rnode{C}{}}}{%
         \Tr{\rnode{B2}{}Wilhelm Heinrich} \Tr{Friedrich}}}
 \psset{arrowscale=2,linewidth=0.2pt}
 \pcline[linestyle=dashed](A)(A|0,-1)   \pcline[linestyle=dashed](B1)(B1|0,-1)
 \pcline[linestyle=dashed](B2)(B2|0,-1) \pcline[linestyle=dashed](C)(C|0,-1)
 \psline{<->}(A|0,-.8)(B1|0,-.8)        \psline{<->}(B2|0,-.8)(C|0,-.8)
\end{document}