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diff --git a/monte-carlo.tex b/monte-carlo.tex
index a3e18a4..57f3859 100644
--- a/monte-carlo.tex
+++ b/monte-carlo.tex
@@ -543,6 +543,13 @@ conjecture.
 
 \begin{figure}
   \include{fig_generator-times}
+  \caption{
+    The scaled correlation time of the Wolff algorithm for a $32\times32$ O(2)
+    model as a function of applied vector field magnitude $|H|$. The red line
+    represents reflections sampled from a uniform distribution on $S^1$,
+    while the green line represents reflections sampled as described in
+    section \ref{sec:examples:on}.
+  }
 \end{figure}
 
 \section{Applying Nonlinear Fields to the xy Model}