Figure captions are a part of the compuscript and should appear after the references. They should be input sequentially in the order in which they are cited in the text; LaTeX will label and number the captions FIG. 1, FIG. 2, etc.
Note below the use of the \label{#1} command; this is used to
cross-reference figures in text. The \label{#1} command should be
inserted inside or after the figure caption, but before the end of the
figure environment.
input:
\begin{figure}
\caption{Text of first caption.}
\label{fig1}
\end{figure}
\begin{figure}
\caption{This is the second caption:
comparison of the differential cross
sections for the subprocess $qg \rightarrow
qggg$ of our approximation (dotted line)
versus the approximation of Maxwell together
with the use of the effective structure
function approximation(solid line).}
\label{fig2}
\end{figure}
output:
Figure 1: Text of first caption.
Figure 2: This is the second caption:
comparison of the differential cross sections
for the subprocess 
of our
approximation (dotted line) versus the
approximation of Maxwell together with the use
of the effective structure function
approximation(solid line).
Figures are cited in text with the use of the \ref{#1} command:
input:
...It can be seen from Fig.\ \ref{fig1} that
the data are inconsistent with this
conclusion...
output:
...It can be seen from Fig. 1 that the data are inconsistent with this conclusion...
Further information on cross-referencing can be found in Sec. vi.
Figures in REVTeX do not normally float. The floats style option
restores floating behavior for figures and tables. (This option has been
added for the author's personal use. It should not be used in any file
destined for submission to the APS.)
Figures and illustrations are submitted as originals or glossy prints. Follow the rules in the Physical Review Style and Notation Guide for style and specifications.