diff --git a/src/java/com/threerings/micasa/lobby/LobbyConfig.java b/src/java/com/threerings/micasa/lobby/LobbyConfig.java
index 23080e61c..0dc2a657e 100644
--- a/src/java/com/threerings/micasa/lobby/LobbyConfig.java
+++ b/src/java/com/threerings/micasa/lobby/LobbyConfig.java
@@ -1,19 +1,14 @@
 //
-// $Id: LobbyConfig.java,v 1.6 2002/07/23 05:54:52 mdb Exp $
+// $Id: LobbyConfig.java,v 1.7 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.micasa.lobby;
 
-import java.io.IOException;
-
 import javax.swing.JComponent;
 import javax.swing.JLabel;
 
 import java.util.Properties;
 import com.samskivert.util.StringUtil;
 
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
-
 import com.threerings.crowd.data.PlaceConfig;
 import com.threerings.parlor.game.GameConfig;
 import com.threerings.micasa.util.MiCasaContext;
@@ -65,26 +60,6 @@ public class LobbyConfig extends PlaceConfig
         _gameConfigClass = getConfigValue(config, "game_config");
     }
 
-    /**
-     * Writes our custom streamable fields.
-     */
-    public void writeObject (ObjectOutputStream out)
-        throws IOException
-    {
-        out.defaultWriteObject();
-        out.writeUTF(_gameConfigClass);
-    }
-
-    /**
-     * Reads our custom streamable fields.
-     */
-    public void readObject (ObjectInputStream in)
-        throws IOException, ClassNotFoundException
-    {
-        in.defaultReadObject();
-        _gameConfigClass = in.readUTF();
-    }
-
     // documentation inherited
     protected void toString (StringBuffer buf)
     {
diff --git a/src/java/com/threerings/parlor/data/Table.java b/src/java/com/threerings/parlor/data/Table.java
index 0da49995f..de28dd26e 100644
--- a/src/java/com/threerings/parlor/data/Table.java
+++ b/src/java/com/threerings/parlor/data/Table.java
@@ -1,15 +1,10 @@
 //
-// $Id: Table.java,v 1.11 2002/08/14 19:07:53 mdb Exp $
+// $Id: Table.java,v 1.12 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.parlor.data;
 
-import java.io.IOException;
-
 import com.samskivert.util.StringUtil;
 
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
-
 import com.threerings.presents.dobj.DSet;
 
 import com.threerings.parlor.data.ParlorCodes;
@@ -255,26 +250,6 @@ public class Table
         }
     }
 
-    /**
-     * Writes our custom streamable fields.
-     */
-    public void writeObject (ObjectOutputStream out)
-        throws IOException
-    {
-        out.defaultWriteObject();
-        out.writeObject(_tconfig);
-    }
-
-    /**
-     * Reads our custom streamable fields.
-     */
-    public void readObject (ObjectInputStream in)
-        throws IOException, ClassNotFoundException
-    {
-        in.defaultReadObject();
-        _tconfig = (TableConfig)in.readObject();
-    }
-
     /**
      * Generates a string representation of this table instance.
      */
diff --git a/src/java/com/threerings/presents/data/InvocationMarshaller.java b/src/java/com/threerings/presents/data/InvocationMarshaller.java
index efea71452..07b4a4825 100644
--- a/src/java/com/threerings/presents/data/InvocationMarshaller.java
+++ b/src/java/com/threerings/presents/data/InvocationMarshaller.java
@@ -1,14 +1,10 @@
 //
-// $Id: InvocationMarshaller.java,v 1.3 2002/12/08 02:18:50 mdb Exp $
+// $Id: InvocationMarshaller.java,v 1.4 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.data;
 
-import java.io.IOException;
-
 import com.samskivert.util.StringUtil;
 
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
 import com.threerings.io.Streamable;
 
 import com.threerings.presents.Log;
@@ -129,26 +125,6 @@ public class InvocationMarshaller
             _invOid, _invCode, methodId, args);
     }
 
-    /**
-     * Writes this instance to the supplied output stream.
-     */
-    public void writeObject (ObjectOutputStream out)
-        throws IOException
-    {
-        out.writeInt(_invOid);
-        out.writeShort(_invCode);
-    }
-
-    /**
-     * Reads this instance from the supplied input stream.
-     */
-    public void readObject (ObjectInputStream in)
-        throws IOException
-    {
-        _invOid = in.readInt();
-        _invCode = in.readShort();
-    }
-
     /**
      * Generates a string representation of this instance.
      */
diff --git a/src/java/com/threerings/presents/dobj/CompoundEvent.java b/src/java/com/threerings/presents/dobj/CompoundEvent.java
index 1afc4da5f..0a39a3ac6 100644
--- a/src/java/com/threerings/presents/dobj/CompoundEvent.java
+++ b/src/java/com/threerings/presents/dobj/CompoundEvent.java
@@ -1,13 +1,11 @@
 //
-// $Id: CompoundEvent.java,v 1.7 2002/12/20 23:29:04 mdb Exp $
+// $Id: CompoundEvent.java,v 1.8 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.dobj;
 
 import java.util.ArrayList;
 import java.util.List;
 
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
 import com.threerings.util.StreamableArrayList;
 
 /**
diff --git a/src/java/com/threerings/presents/dobj/DEvent.java b/src/java/com/threerings/presents/dobj/DEvent.java
index 69349e154..da9c679b3 100644
--- a/src/java/com/threerings/presents/dobj/DEvent.java
+++ b/src/java/com/threerings/presents/dobj/DEvent.java
@@ -1,12 +1,8 @@
 //
-// $Id: DEvent.java,v 1.11 2002/07/23 05:52:48 mdb Exp $
+// $Id: DEvent.java,v 1.12 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.dobj;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
 import com.threerings.io.Streamable;
 
 /**
@@ -91,26 +87,6 @@ public abstract class DEvent implements Streamable
         // the default is to do nothing
     }
 
-    /**
-     * Writes our custom streamable fields.
-     */
-    public void writeObject (ObjectOutputStream out)
-        throws IOException
-    {
-        out.defaultWriteObject();
-        out.writeInt(_toid);
-    }
-
-    /**
-     * Reads our custom streamable fields.
-     */
-    public void readObject (ObjectInputStream in)
-        throws IOException, ClassNotFoundException
-    {
-        in.defaultReadObject();
-        _toid = in.readInt();
-    }
-
     /**
      * Constructs and returns a string representation of this event.
      */
diff --git a/src/java/com/threerings/presents/dobj/DObject.java b/src/java/com/threerings/presents/dobj/DObject.java
index 28283d194..babe9750f 100644
--- a/src/java/com/threerings/presents/dobj/DObject.java
+++ b/src/java/com/threerings/presents/dobj/DObject.java
@@ -1,17 +1,14 @@
 //
-// $Id: DObject.java,v 1.55 2002/12/12 00:30:47 mdb Exp $
+// $Id: DObject.java,v 1.56 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.dobj;
 
-import java.io.IOException;
 import java.lang.reflect.Field;
 import java.util.ArrayList;
 
 import com.samskivert.util.ListUtil;
 import com.samskivert.util.StringUtil;
 
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
 import com.threerings.io.Streamable;
 
 import com.threerings.presents.Log;
@@ -696,26 +693,6 @@ public class DObject implements Streamable
         }
     }        
 
-    /**
-     * Writes our custom streamable fields.
-     */
-    public void writeObject (ObjectOutputStream out)
-        throws IOException
-    {
-        out.defaultWriteObject();
-        out.writeInt(_oid);
-    }
-
-    /**
-     * Reads our custom streamable fields.
-     */
-    public void readObject (ObjectInputStream in)
-        throws IOException, ClassNotFoundException
-    {
-        in.defaultReadObject();
-        _oid = in.readInt();
-    }
-
     /**
      * Removes this object from participation in any transaction in which
      * it might be taking part.
diff --git a/src/java/com/threerings/presents/dobj/DSet.java b/src/java/com/threerings/presents/dobj/DSet.java
index ee6f0ee07..57d18611a 100644
--- a/src/java/com/threerings/presents/dobj/DSet.java
+++ b/src/java/com/threerings/presents/dobj/DSet.java
@@ -1,17 +1,14 @@
 //
-// $Id: DSet.java,v 1.24 2002/12/20 23:29:04 mdb Exp $
+// $Id: DSet.java,v 1.25 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.dobj;
 
-import java.io.IOException;
 import java.util.Comparator;
 import java.util.Iterator;
 
 import com.samskivert.util.ArrayUtil;
 import com.samskivert.util.StringUtil;
 
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
 import com.threerings.io.Streamable;
 
 import com.threerings.presents.Log;
@@ -297,36 +294,6 @@ public class DSet
         }
     }
 
-    /**
-     * Writes our custom streamable fields.
-     */
-    public void writeObject (ObjectOutputStream out)
-        throws IOException
-    {
-        out.defaultWriteObject();
-
-        int ecount = _entries.length;
-        for (int ii = 0; ii < ecount; ii++) {
-            if (_entries[ii] != null) {
-                out.writeObject(_entries[ii]);
-            }
-        }
-    }
-
-    /**
-     * Reads our custom streamable fields.
-     */
-    public void readObject (ObjectInputStream in)
-        throws IOException, ClassNotFoundException
-    {
-        in.defaultReadObject();
-
-        _entries = new Entry[Math.max(_size, INITIAL_CAPACITY)];
-        for (int ii = 0; ii < _size; ii++) {
-            _entries[ii] = (Entry)in.readObject();
-        }
-    }
-
     /**
      * Generates a string representation of this set instance.
      */
@@ -347,7 +314,7 @@ public class DSet
     }
 
     /** The entries of the set (in a sparse array). */
-    protected transient Entry[] _entries = new Entry[INITIAL_CAPACITY];
+    protected Entry[] _entries = new Entry[INITIAL_CAPACITY];
 
     /** The number of entries in this set. */
     protected int _size;
diff --git a/src/java/com/threerings/presents/dobj/OidList.java b/src/java/com/threerings/presents/dobj/OidList.java
index db3410181..ffd4173a4 100644
--- a/src/java/com/threerings/presents/dobj/OidList.java
+++ b/src/java/com/threerings/presents/dobj/OidList.java
@@ -1,12 +1,8 @@
 //
-// $Id: OidList.java,v 1.5 2002/07/23 05:52:48 mdb Exp $
+// $Id: OidList.java,v 1.6 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.dobj;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
 import com.threerings.io.Streamable;
 
 /**
@@ -113,28 +109,6 @@ public class OidList implements Streamable
         return _oids[index];
     }
 
-    /**
-     * Writes our custom streamable fields.
-     */
-    public void writeObject (ObjectOutputStream out)
-        throws IOException
-    {
-        out.defaultWriteObject();
-        out.writeInt(_size);
-        out.writeObject(_oids);
-    }
-
-    /**
-     * Reads our custom streamable fields.
-     */
-    public void readObject (ObjectInputStream in)
-        throws IOException, ClassNotFoundException
-    {
-        in.defaultReadObject();
-        _size = in.readInt();
-        _oids = (int[])in.readObject();
-    }
-
     public String toString ()
     {
         StringBuffer buf = new StringBuffer();
diff --git a/src/java/com/threerings/presents/net/AuthRequest.java b/src/java/com/threerings/presents/net/AuthRequest.java
index fe5959637..1e4fff55f 100644
--- a/src/java/com/threerings/presents/net/AuthRequest.java
+++ b/src/java/com/threerings/presents/net/AuthRequest.java
@@ -1,13 +1,8 @@
 //
-// $Id: AuthRequest.java,v 1.10 2002/12/20 23:28:24 mdb Exp $
+// $Id: AuthRequest.java,v 1.11 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.net;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
-
 public class AuthRequest extends UpstreamMessage
 {
     /**
diff --git a/src/java/com/threerings/presents/net/AuthResponse.java b/src/java/com/threerings/presents/net/AuthResponse.java
index 594513dc6..7d78090a5 100644
--- a/src/java/com/threerings/presents/net/AuthResponse.java
+++ b/src/java/com/threerings/presents/net/AuthResponse.java
@@ -1,13 +1,8 @@
 //
-// $Id: AuthResponse.java,v 1.13 2002/12/20 23:28:24 mdb Exp $
+// $Id: AuthResponse.java,v 1.14 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.net;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
-
 /**
  * The auth response communicates authentication success or failure as
  * well as associated information via a distribted object transmitted
diff --git a/src/java/com/threerings/presents/net/BootstrapNotification.java b/src/java/com/threerings/presents/net/BootstrapNotification.java
index b12457f88..ddb01c0f8 100644
--- a/src/java/com/threerings/presents/net/BootstrapNotification.java
+++ b/src/java/com/threerings/presents/net/BootstrapNotification.java
@@ -1,13 +1,8 @@
 //
-// $Id: BootstrapNotification.java,v 1.5 2002/12/20 23:28:24 mdb Exp $
+// $Id: BootstrapNotification.java,v 1.6 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.net;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
-
 /**
  * A bootstrap notification is delivered to the client once the server has
  * fully initialized itself in preparation for dealing with this client.
diff --git a/src/java/com/threerings/presents/net/Credentials.java b/src/java/com/threerings/presents/net/Credentials.java
index 76bde14b0..18859a216 100644
--- a/src/java/com/threerings/presents/net/Credentials.java
+++ b/src/java/com/threerings/presents/net/Credentials.java
@@ -1,12 +1,8 @@
 //
-// $Id: Credentials.java,v 1.10 2002/12/20 23:28:24 mdb Exp $
+// $Id: Credentials.java,v 1.11 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.net;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
 import com.threerings.io.Streamable;
 
 /**
diff --git a/src/java/com/threerings/presents/net/DownstreamMessage.java b/src/java/com/threerings/presents/net/DownstreamMessage.java
index b7501be2a..85ef6530d 100644
--- a/src/java/com/threerings/presents/net/DownstreamMessage.java
+++ b/src/java/com/threerings/presents/net/DownstreamMessage.java
@@ -1,12 +1,8 @@
 //
-// $Id: DownstreamMessage.java,v 1.10 2002/12/20 23:28:24 mdb Exp $
+// $Id: DownstreamMessage.java,v 1.11 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.net;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
 import com.threerings.io.SimpleStreamableObject;
 
 /**
diff --git a/src/java/com/threerings/presents/net/EventNotification.java b/src/java/com/threerings/presents/net/EventNotification.java
index 0d2709527..46de37992 100644
--- a/src/java/com/threerings/presents/net/EventNotification.java
+++ b/src/java/com/threerings/presents/net/EventNotification.java
@@ -1,13 +1,8 @@
 //
-// $Id: EventNotification.java,v 1.12 2002/12/20 23:28:24 mdb Exp $
+// $Id: EventNotification.java,v 1.13 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.net;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
-
 import com.threerings.presents.dobj.DEvent;
 
 public class EventNotification extends DownstreamMessage
diff --git a/src/java/com/threerings/presents/net/FailureResponse.java b/src/java/com/threerings/presents/net/FailureResponse.java
index cf9b693de..b75438791 100644
--- a/src/java/com/threerings/presents/net/FailureResponse.java
+++ b/src/java/com/threerings/presents/net/FailureResponse.java
@@ -1,13 +1,8 @@
 //
-// $Id: FailureResponse.java,v 1.9 2002/12/20 23:28:24 mdb Exp $
+// $Id: FailureResponse.java,v 1.10 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.net;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
-
 public class FailureResponse extends DownstreamMessage
 {
     /**
diff --git a/src/java/com/threerings/presents/net/ForwardEventRequest.java b/src/java/com/threerings/presents/net/ForwardEventRequest.java
index 9553039de..a6e8e5030 100644
--- a/src/java/com/threerings/presents/net/ForwardEventRequest.java
+++ b/src/java/com/threerings/presents/net/ForwardEventRequest.java
@@ -1,13 +1,8 @@
 //
-// $Id: ForwardEventRequest.java,v 1.11 2002/12/20 23:28:24 mdb Exp $
+// $Id: ForwardEventRequest.java,v 1.12 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.net;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
-
 import com.threerings.presents.dobj.DEvent;
 
 public class ForwardEventRequest extends UpstreamMessage
diff --git a/src/java/com/threerings/presents/net/ObjectResponse.java b/src/java/com/threerings/presents/net/ObjectResponse.java
index b65e5a946..62c045d71 100644
--- a/src/java/com/threerings/presents/net/ObjectResponse.java
+++ b/src/java/com/threerings/presents/net/ObjectResponse.java
@@ -1,13 +1,8 @@
 //
-// $Id: ObjectResponse.java,v 1.13 2002/12/20 23:28:24 mdb Exp $
+// $Id: ObjectResponse.java,v 1.14 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.net;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
-
 import com.threerings.presents.dobj.DObject;
 
 public class ObjectResponse extends DownstreamMessage
diff --git a/src/java/com/threerings/presents/net/SubscribeRequest.java b/src/java/com/threerings/presents/net/SubscribeRequest.java
index 2451c819b..393c4a293 100644
--- a/src/java/com/threerings/presents/net/SubscribeRequest.java
+++ b/src/java/com/threerings/presents/net/SubscribeRequest.java
@@ -1,13 +1,8 @@
 //
-// $Id: SubscribeRequest.java,v 1.7 2002/12/20 23:28:24 mdb Exp $
+// $Id: SubscribeRequest.java,v 1.8 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.net;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
-
 public class SubscribeRequest extends UpstreamMessage
 {
     /**
diff --git a/src/java/com/threerings/presents/net/UnsubscribeRequest.java b/src/java/com/threerings/presents/net/UnsubscribeRequest.java
index c1c17b775..2c1a3e0ac 100644
--- a/src/java/com/threerings/presents/net/UnsubscribeRequest.java
+++ b/src/java/com/threerings/presents/net/UnsubscribeRequest.java
@@ -1,13 +1,8 @@
 //
-// $Id: UnsubscribeRequest.java,v 1.8 2002/12/20 23:28:24 mdb Exp $
+// $Id: UnsubscribeRequest.java,v 1.9 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.net;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
-
 public class UnsubscribeRequest extends UpstreamMessage
 {
     /**
diff --git a/src/java/com/threerings/presents/net/UpstreamMessage.java b/src/java/com/threerings/presents/net/UpstreamMessage.java
index 0a8524754..91093e3a2 100644
--- a/src/java/com/threerings/presents/net/UpstreamMessage.java
+++ b/src/java/com/threerings/presents/net/UpstreamMessage.java
@@ -1,12 +1,8 @@
 //
-// $Id: UpstreamMessage.java,v 1.10 2002/12/20 23:28:24 mdb Exp $
+// $Id: UpstreamMessage.java,v 1.11 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.net;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
 import com.threerings.io.SimpleStreamableObject;
 
 /**
diff --git a/src/java/com/threerings/presents/net/UsernamePasswordCreds.java b/src/java/com/threerings/presents/net/UsernamePasswordCreds.java
index 0c70fd031..7f791252e 100644
--- a/src/java/com/threerings/presents/net/UsernamePasswordCreds.java
+++ b/src/java/com/threerings/presents/net/UsernamePasswordCreds.java
@@ -1,13 +1,8 @@
 //
-// $Id: UsernamePasswordCreds.java,v 1.10 2002/12/20 23:28:24 mdb Exp $
+// $Id: UsernamePasswordCreds.java,v 1.11 2002/12/20 23:41:26 mdb Exp $
 
 package com.threerings.presents.net;
 
-import java.io.IOException;
-
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
-
 public class UsernamePasswordCreds extends Credentials
 {
     /**
diff --git a/src/java/com/threerings/whirled/zone/data/SceneSummary.java b/src/java/com/threerings/whirled/zone/data/SceneSummary.java
index 0bbd540ef..684aff618 100644
--- a/src/java/com/threerings/whirled/zone/data/SceneSummary.java
+++ b/src/java/com/threerings/whirled/zone/data/SceneSummary.java
@@ -1,17 +1,13 @@
 //
-// $Id: SceneSummary.java,v 1.4 2002/07/23 05:54:53 mdb Exp $
+// $Id: SceneSummary.java,v 1.5 2002/12/20 23:41:27 mdb Exp $
 
 package com.threerings.whirled.zone.data;
 
-import java.io.IOException;
-
 import com.samskivert.util.StringUtil;
 
 import com.threerings.util.DirectionCodes;
 import com.threerings.util.DirectionUtil;
 
-import com.threerings.io.ObjectInputStream;
-import com.threerings.io.ObjectOutputStream;
 import com.threerings.io.Streamable;
 
 /**
@@ -54,26 +50,6 @@ public class SceneSummary implements Streamable
         _population = population;
     }
 
-    /**
-     * Writes our custom streamable fields.
-     */
-    public void writeObject (ObjectOutputStream out)
-        throws IOException
-    {
-        out.defaultWriteObject();
-        out.writeInt(getPopulation());
-    }
-
-    /**
-     * Reads our custom streamable fields.
-     */
-    public void readObject (ObjectInputStream in)
-        throws IOException, ClassNotFoundException
-    {
-        in.defaultReadObject();
-        _population = in.readInt();
-    }
-
     /**
      * Generates a string representation of this instance.
      */