Chapter 4 examples

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@@ -163,6 +163,27 @@
                     <t>Nope, one more</t>
                 </td>
             </tr>
+            <tr>
+                <th colspan = "2">
+                    <t>Chapter 4: Oscillations</t>
+                </th>
+            </tr>
+            <tr>
+                <td>
+                    <a href='dampedAndDrivenSpring.html'>Damped and driven spring</a>
+                </td>
+                <td>
+                    <t>Damped and driven spring resonance example</t>
+                </td>
+            </tr>
+            <tr>
+                <td>
+                    <a href='twoMassesThreeSprings.html'>Two masses, three springs</a>
+                </td>
+                <td>
+                    <t>Other example problem from chapter 4</t>
+                </td>
+            </tr>
         </table>
         <p xmlns:cc="http://creativecommons.org/ns#" >
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