diff -ru -X /home/jjm/cvs/no.freeciv FreecivCVS/client/gui-gtk/helpdlg.c freeciv/client/gui-gtk/helpdlg.c
--- FreecivCVS/client/gui-gtk/helpdlg.c	Sat Mar  4 16:24:15 2000
+++ freeciv/client/gui-gtk/helpdlg.c	Fri Mar 31 08:58:52 2000
@@ -638,16 +638,28 @@
     gtk_container_add(GTK_CONTAINER(help_vbox), w);
 
     for(j=0; j<B_LAST; ++j) {
-      if(i!=improvement_types[j].tech_requirement) continue;
-      hbox = gtk_hbox_new(FALSE, 0);
-      gtk_container_add(GTK_CONTAINER(help_vbox), hbox);
-      w = gtk_label_new(_("Allows "));
-      gtk_box_pack_start(GTK_BOX(hbox), w, FALSE, FALSE, 0);
-      w = help_slink_new(improvement_types[j].name,
-			is_wonder(j)?HELP_WONDER:HELP_IMPROVEMENT);
-      gtk_box_pack_start(GTK_BOX(hbox), w, FALSE, FALSE, 0);
-      w = gtk_label_new(".");
-      gtk_box_pack_start(GTK_BOX(hbox), w, FALSE, FALSE, 0);
+      if(i==improvement_types[j].tech_requirement) {
+        hbox = gtk_hbox_new(FALSE, 0);
+        gtk_container_add(GTK_CONTAINER(help_vbox), hbox);
+        w = gtk_label_new(_("Allows "));
+        gtk_box_pack_start(GTK_BOX(hbox), w, FALSE, FALSE, 0);
+        w = help_slink_new(improvement_types[j].name,
+			  is_wonder(j)?HELP_WONDER:HELP_IMPROVEMENT);
+        gtk_box_pack_start(GTK_BOX(hbox), w, FALSE, FALSE, 0);
+        w = gtk_label_new(".");
+        gtk_box_pack_start(GTK_BOX(hbox), w, FALSE, FALSE, 0);
+      }
+      if(i==improvement_types[j].obsolete_by) {
+        hbox = gtk_hbox_new(FALSE, 0);
+        gtk_container_add(GTK_CONTAINER(help_vbox), hbox);
+        w = gtk_label_new(_("Obsoletes "));
+        gtk_box_pack_start(GTK_BOX(hbox), w, FALSE, FALSE, 0);
+        w = help_slink_new(improvement_types[j].name,
+			  is_wonder(j)?HELP_WONDER:HELP_IMPROVEMENT);
+        gtk_box_pack_start(GTK_BOX(hbox), w, FALSE, FALSE, 0);
+        w = gtk_label_new(".");
+        gtk_box_pack_start(GTK_BOX(hbox), w, FALSE, FALSE, 0);
+      }
     }
     for(j=0; j<game.num_unit_types; ++j) {
       if(i!=get_unit_type(j)->tech_requirement) continue;
diff -ru -X /home/jjm/cvs/no.freeciv FreecivCVS/client/gui-xaw/helpdlg.c freeciv/client/gui-xaw/helpdlg.c
--- FreecivCVS/client/gui-xaw/helpdlg.c	Sun Jan  2 06:55:32 2000
+++ freeciv/client/gui-xaw/helpdlg.c	Fri Mar 31 09:12:33 2000
@@ -606,7 +606,7 @@
 			      XtNeditType, XawtextRead,
 			      XtNscrollVertical, XawtextScrollAlways, 
 			      XtNwidth, w2,
-			      XtNheight, 70,
+			      XtNheight, 95,
 			      NULL);
 
     XtVaGetValues(help_text, XtNy, &ay, XtNheight, &ah, NULL);
@@ -915,6 +915,9 @@
     for(j=0; j<B_LAST; ++j) {
       if(i==improvement_types[j].tech_requirement) 
 	sprintf(buf+strlen(buf), _("Allows %s.\n"),
+		improvement_types[j].name);
+      if(i==improvement_types[j].obsolete_by)
+	sprintf(buf+strlen(buf), _("Obsoletes %s.\n"),
 		improvement_types[j].name);
     }
     for(j=0; j<game.num_unit_types; ++j) {