g the window to be narrower than the boxes so that the text inside
  them wraps into two or more lines.</p>

  <div class="float"> <div> this is a float this is a float this is a float </div> </div>
  <div class="float"> <div> this is a float this is a float this is a float </div> </div>
  <div class="float"> <div> this is a float this is a float this is a float </div> </div>
  <div class="float"> <div> this is a float this is a float this is a float </div> </div>
  <div class="float"> <div> this is a float