diff --git a/Cantera/src/Array.h b/Cantera/src/Array.h
index 1fbdfd8ea..02b888304 100755
--- a/Cantera/src/Array.h
+++ b/Cantera/src/Array.h
@@ -179,6 +179,10 @@ namespace Cantera {
         const vector_fp& data() const { return m_data; }
 
 
+	/// Return a pointer to the top of column j, columns are contiguous
+	//  in memory
+	doublereal * ptrColumn(int j) { return &(m_data[m_nrows*j]); }
+
     protected:
 
         vector_fp m_data;