diff -u -r1.4 -r1.5
--- elements.xml	16 May 2006 21:27:08 -0000	1.4
+++ elements.xml	15 Mar 2007 00:50:59 -0000	1.5
@@ -770,14 +770,5 @@

     <D type="density" unit="g/cm3" value="6.52" />
     <composite n="1" ref="Zr" />
   </material>

-<!--
-  <element name="vacuum" formula="vacuum" Z="0.0">
-    <atom type="A" unit="g/mol" value="0.0" />
-  </element>
--->
-  <material name="vacuum">
-    <D type="density" unit="g/cm3" value="0.0" />
-    <composite n="1" ref="vacuum" />
-  </material>

 </materials>