diff --git a/Doc/Sd1/objectsClasses.xml b/Doc/Sd1/objectsClasses.xml
index 3b6387a4ab003686a5f3f1d407c22b8cb4ce056c..c98d47ec318662980d260cdab58821668aaf7ca3 100644
--- a/Doc/Sd1/objectsClasses.xml
+++ b/Doc/Sd1/objectsClasses.xml
@@ -522,13 +522,13 @@ public class Print {
 
             <programlisting language="java">public static void main(...) {
   String john = new String("John");
-  System.out.println("Name:" + john);
+  System.out.println("Name: " + john);
   System.out.println(john.sayHello());
 }</programlisting>
 
             <para>The expected output reads:</para>
 
-            <screen>John
+            <screen>Name: John
 Hello 'John'</screen>
 
             <tip>
@@ -1023,7 +1023,7 @@ public class Rectangle {
   }
  
   /**
-   * @param width The rectangle's new height
+   * @param height The rectangle's new height
    */
   public void setHeight(double height) {
       // TODO
@@ -1368,7 +1368,7 @@ public class Circle {
     // TODO
   }
   /**
-   * @param x The circle's x center coordinate value
+   * @param y The circle's y center coordinate value
    */
   public void setY(double y) {
     // TODO
@@ -1404,7 +1404,7 @@ public class Circle {
     * 
     * @param x The circle center's x-coordinate
     * @param y The circle center's y-coordinate
-    * @param The circle's radius
+    * @param radius The circle's radius
     */
    public Circle(double x, double y, double radius) {
      ...
@@ -1456,7 +1456,7 @@ public class Circle {
     r.writeSvg(); 
     
     // Draw a circle as SVG
-    final Circle c = new Circle(1, 3);
+    final Circle c = new Circle(3);
     c.setX(3);
     c.setY(1);
     c.writeSvg();
@@ -1468,8 +1468,12 @@ public class Circle {
             <para>Implement the method <methodname>void
             writeSvg()</methodname> in both classes
             <classname>Rectangle</classname> and
-            <classname>Circle</classname>. This should produce an output
-            result like:</para>
+            <classname>Circle</classname>. The following sample export is
+            intended for 300x200 pixel requiring to scale
+            <abbrev>e.g.</abbrev> the above circle's radius of three by a
+            factor of 20 resulting in an effective <tag
+            class="emptytag">circle r='60' ...</tag> value. This scaling is
+            being required for all parameters:</para>
 
             <programlisting language="java">&lt;!DOCTYPE html&gt;
 &lt;html&gt;
@@ -2595,6 +2599,63 @@ a = 33;</programlisting></td>
         </informaltable>
       </figure>
 
+      <figure xml:id="sd1_fig_rectangle_constructorCallsConstructor">
+        <title>Constructor calls within constructor</title>
+
+        <informaltable border="1">
+          <tr>
+            <td valign="top"><programlisting language="java">public class Rectangle {
+  int width, height;
+
+  public Rectangle(int width, int height){     
+    this.width = width;
+    this.height = height;
+  }
+  public Rectangle() {
+    width = height = 1;
+  }
+  public Rectangle(int widthAndHeight) {
+    width = height = widthAndHeight;
+  }
+}</programlisting></td>
+
+            <td><programlisting language="java">public class Rectangle {
+  int width, height;
+
+  public Rectangle(int width, int height){      
+    this.width = width;
+    this.height = height;
+  }
+  public Rectangle() {
+    this(1, 1); <co linkends="sd1_fig_rectangle_constructorCallsConstructor-1"
+                  xml:id="sd1_fig_rectangle_constructorCallsConstructor-1-co"/>
+  }
+  public Rectangle(int widthAndHeight) {
+    this(widthAndHeight, widthAndHeight); <co
+                  linkends="sd1_fig_rectangle_constructorCallsConstructor-2"
+                  xml:id="sd1_fig_rectangle_constructorCallsConstructor-2-co"/>
+  }
+}</programlisting></td>
+          </tr>
+        </informaltable>
+      </figure>
+
+      <calloutlist>
+        <callout arearefs="sd1_fig_rectangle_constructorCallsConstructor-1-co"
+                 xml:id="sd1_fig_rectangle_constructorCallsConstructor-1">
+          <para>Reusing constructor <methodname>Rectangle(int width, int
+          height)</methodname> with parameters <code language="java">width =
+          height = 1</code>.</para>
+        </callout>
+
+        <callout arearefs="sd1_fig_rectangle_constructorCallsConstructor-2-co"
+                 xml:id="sd1_fig_rectangle_constructorCallsConstructor-2">
+          <para>Reusing constructor <methodname>Rectangle(int width, int
+          height)</methodname> with parameters <code language="java">width =
+          height = widthAndHeight</code>.</para>
+        </callout>
+      </calloutlist>
+
       <figure xml:id="sd1_fig_rectangleThreeConstructorsInstances">
         <title>Instances by overloaded constructors</title>