Hello,<br><br>If load in a parameter file ( <i>pf = load(&quot;~/data/Enzo/DD0252/DD0252&quot;)</i>) and access the dictionary via   <i>pf[&#39;Density&#39;] </i>it returns a value of 2.49711e-30.  I realize that if I enter <i>pf[&#39;mpc&#39;] </i>it returns the conversion factor to go from system units to physical units.  If yt keeps everything in cgs, then what conversion factor (if any) does <i>pf[&#39;Density&#39;]  </i>return?  Thanks!<br>
<br><br><br><br><br><br clear="all"><br>~ali<br>