function _size75( $string ) {
    $strlen = strlen( $string );
    $tmp    = $string;
    $string = null;
    while( $strlen > 75 ) {
       $breakAtChar = 75;
       if( substr( $tmp, ( $breakAtChar - 1 ), strlen( '\n' )) == '\n' )
         $breakAtChar = $breakAtChar - 1;
       $string .= substr( $tmp, 0, $breakAtChar );
       $string .= $this->nl;
       $tmp     = ' '.substr( $tmp, $breakAtChar );
       $strlen  = strlen( $tmp );
    } // while
    $string .= rtrim( $tmp ); // the rest
    if( $this->nl != substr( $string, ( 0 - strlen( $this->nl ))))
      $string .= $this->nl;
    return $string;
  }