diff --git a/Code/Mantid/Algorithms/inc/MantidAlgorithms/logarithm.h b/Code/Mantid/Algorithms/inc/MantidAlgorithms/logarithm.h
deleted file mode 100644
index 9fb73b82212ef8ce6a40bdad23c19b614ff52e12..0000000000000000000000000000000000000000
--- a/Code/Mantid/Algorithms/inc/MantidAlgorithms/logarithm.h
+++ /dev/null
@@ -1,75 +0,0 @@
-#ifndef MANTID_ALGORITHM_LOG_H_
-#define MANTID_ALGORITHM_LOG_H_
-
-#include "c:\mantid\code\mantid\algorithms\inc\mantidalgorithms\unaryoperation.h"
-namespace Mantid{	
-namespace Algorithms {
-/** Takes a workspace as input and calculates the natural logarithm of number of counts for each 1D spectrum.
-    The algorithm creates a new workspace containing logarithms of signals (numbers of counts) in 
-
-    Required Properties:
-    <UL>
-    <LI> InputWorkspace - The name of the workspace to take as input </LI>
-    <LI> OutputWorkspace - The name of the workspace in which to store the result </LI>
-    </UL>
-
-    Optional Properties (assume that you count from zero):
-    <UL>
-	<LI> filler  -- A workspace can normally have zeros in it and the logarithm goes to minys infinity for zeros. 
-	                This field keeps value, that should be placed in the workspace instead of minus infinity </LI>
-    <LI> natural -- Natural or base 10 logarithm. Default is natural </LI>
-    </UL>
-
-    @author AB,    ISIS, Rutherford Appleton Laboratory
-    @date 12/05/2010
-    Copyright &copy; 2007-2010 STFC Rutherford Appleton Laboratory
-
-    This file is part of Mantid.
-
-    Mantid is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 3 of the License, or
-    (at your option) any later version.
-
-    Mantid is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-    File change history is stored at: <https://svn.mantidproject.org/mantid/trunk/Code/Mantid>
-    Code Documentation is available at: <http://doxygen.mantidproject.org>
- */
-class DLLExport logarithm : public UnaryOperation
-{
-public:
-	logarithm(void):UnaryOperation(),log_Min(0),is_natural(true){};
-	virtual ~logarithm(void){};
-    /// Algorithm's name for identification 
-	virtual const std::string name() const { return "log";}
-   /// Algorithm's version for identification 
-	virtual const int version() const { return (1);}
-    /// Algorithm's category for identification
-    virtual const std::string category() const { return "Arithmetic";}
-private:
-  // Overridden Algorithm methods
-  void init();
-  //void exec();
-  /// The value to replace ln(0)
-  double log_Min;
-  /// If the logarithm natural or 10-based
-  bool   is_natural;
-  /// 
-
-  /// get properties from GUI
-  virtual void retrieveProperties();
- /// Actually the function, which is run on values when the operation is performed
-  virtual void performUnaryOperation(const double& XIn, const double& YIn, const double& EIn, double& YOut, double& EOut);
-
-
-};
-} // End namespace Algorithms
-} // End namespace Mantid
-#endif