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<blockquote><font color="#cc9966"><FONT FACE="Arial, Tahoma, Helvetica"><b>entasis</b>
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<font size="-2" face="Arial, Tahoma, Helvetica"><font color="#cc9966"><FONT FACE="Arial, Tahoma, Helvetica">December 7
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Columns with uniformly shaped shafts actually appear slightly concave due to an optical illusion created by the lines of the parallel column faces.  Entasis is the slight, convex shape given to columns in order to correct this illusion. 


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