diff --git a/Meade.net.Telescope/AstroMaths/IAstroMaths.cs b/Meade.net.Telescope/AstroMaths/IAstroMaths.cs
index dfcab3a..6cc35ee 100644
--- a/Meade.net.Telescope/AstroMaths/IAstroMaths.cs
+++ b/Meade.net.Telescope/AstroMaths/IAstroMaths.cs
@@ -5,13 +5,13 @@ namespace ASCOM.Meade.net.AstroMaths
     public interface IAstroMaths
     {
         double RightAscensionToHourAngle(DateTime utcDateTime, double longitude, double rightAscension);
-        double HourAngleToRightAscension(DateTime utcDateTime, double longitude, double hourAngle );
+        //double HourAngleToRightAscension(DateTime utcDateTime, double longitude, double hourAngle );
         EquatorialCoordinates ConvertHozToEq( DateTime utcDateTime, double latitude, double longitude, HorizonCoordinates altAz);
         HorizonCoordinates ConvertEqToHoz(double hourAngle, double latitude, EquatorialCoordinates raDec);
-        double DegreesToRadians(double degrees);
-        double RadiansToDegrees(double radians);
-        double DateTimeToDecimalHours( DateTime utcDateTime);
-        double UTtoGst(DateTime utcDateTime);
-        double GsTtoLst(double gst, double longitude);
+        //double DegreesToRadians(double degrees);
+        //double RadiansToDegrees(double radians);
+        //double DateTimeToDecimalHours( DateTime utcDateTime);
+        //double UTtoGst(DateTime utcDateTime);
+        //double GsTtoLst(double gst, double longitude);
     }
 }
\ No newline at end of file
diff --git a/Meade.net.Telescope/StringExtensions.cs b/Meade.net.Telescope/StringExtensions.cs
index 2f2c089..5c92bfc 100644
--- a/Meade.net.Telescope/StringExtensions.cs
+++ b/Meade.net.Telescope/StringExtensions.cs
@@ -7,10 +7,10 @@ namespace ASCOM.Meade.net
             return int.Parse(str);
         }
 
-        public static double ToDouble(this string str)
-        {
-            return double.Parse(str);
-        }
+        //public static double ToDouble(this string str)
+        //{
+        //    return double.Parse(str);
+        //}
 
         public static int Position(this string str, char find, int instance)
         {