--- a/text/ncat.tex	Fri Jun 18 21:13:02 2010 -0700
+++ b/text/ncat.tex	Fri Jun 18 21:17:39 2010 -0700
@@ -1523,6 +1523,7 @@
 \begin{figure}[t]$$
 \definecolor{arcolor}{rgb}{.75,.4,.1}
 \begin{tikzpicture}
+\pgfsetlinewidth{1pt}
 \fill (0,0) circle (.1);
 \draw (0,0) -- (2,0);
 \draw (1,0.1) -- (1,-0.1);
@@ -1534,6 +1535,7 @@
 \end{tikzpicture}
 \qquad
 \begin{tikzpicture}
+\pgfsetlinewidth{1pt}
 \fill (0,0) circle (.1);
 \draw (0,0) -- (2,0);
 \draw (1,0.1) -- (1,-0.1);
@@ -1545,6 +1547,7 @@
 \end{tikzpicture}
 \qquad
 \begin{tikzpicture}
+\pgfsetlinewidth{1pt}
 \fill (0,0) circle (.1);
 \draw (0,0) -- (3,0);
 \foreach \x in {0.5, 1.0, 1.25, 1.5, 2.0, 2.5} {