diff --git a/Cantera/src/State.cpp b/Cantera/src/State.cpp
index cc116bcc0..18c489bfa 100644
--- a/Cantera/src/State.cpp
+++ b/Cantera/src/State.cpp
@@ -28,6 +28,41 @@ namespace Cantera {
 
     State::~State() {}
 
+    State::State(const State& right) : 
+	m_kk(0),
+	m_temp(0.0),
+	m_dens(0.001), 
+	m_mmw(0.0) {
+	/*
+	 * Call the assignment operator.
+	 */
+	*this = operator=(right);
+    }
+
+    /*
+     * Assignment operator for the State Class
+     */
+    State& State::operator=(const State& right) {
+	/*
+	 * Check for self assignment.
+	 */
+	if (this == &right) return *this;
+	/*
+	 * We do a straight assignment operator on all of the
+	 * data. The vectors are copied.
+	 */
+	m_temp           = right.m_temp;
+	m_dens           = right.m_dens;
+	m_mmw            = right.m_mmw;
+	m_y              = right.m_y;
+	m_molwts         = right.m_molwts;
+	m_rmolwts        = right.m_rmolwts;
+	/*
+	 * Return the reference to the current object
+	 */
+	return *this;
+    }
+
     doublereal State::moleFraction(int k) const {
         if (k >= 0 && k < m_kk) {
             return m_ym[k] * m_mmw;
diff --git a/Cantera/src/State.h b/Cantera/src/State.h
index ea06e6019..9772b1110 100755
--- a/Cantera/src/State.h
+++ b/Cantera/src/State.h
@@ -24,7 +24,10 @@
 namespace Cantera {
 
     /**
-     * Manages the thermodynamic state. Class State stores just enough
+     * Manages the independent variables of temperature, mass
+     * density, and mass/mole species fraction that define the
+     * thermodynamic state. 
+     * Class State stores just enough
      * information about a multicomponent solution to specify its
      * intensive thermodynamic state.  It stores values for the
      * temperature, mass density, and an array of species mass
@@ -57,6 +60,16 @@ namespace Cantera {
          */
 	virtual ~State();
 
+	/**
+	 * Copy Constructor for the State Class
+	 */
+	State(const State& right);
+
+	/**
+	 * Assignment operator for the state class.
+	 */
+        State& operator=(const State& right);
+
 
         /// @name Species Information
         /// The only thing class State knows about the species is their