title: Access value by location in sorted pandas series with integer index
body: <p>I have a pandas Series with an integer index which I've sorted (by value), how I access values <strong>by position</strong> in this Series.</p>
  
  <p>For example: </p>
  
  <pre><code>s_original = pd.Series({0: -0.000213, 1: 0.00031399999999999999, 2: -0.00024899999999999998, 3: -2.6999999999999999e-05, 4: 0.000122})
  s_sorted = np.sort(s_original)
  
  In [3]: s_original
  Out[3]: 
  0   -0.000213
  1    0.000314
  2   -0.000249
  3   -0.000027
  4    0.000122
  
  In [4]: s_sorted
  Out[4]: 
  2   -0.000249
  0   -0.000213
  3   -0.000027
  4    0.000122
  1    0.000314
  
  In [5]: s_sorted[3]
  Out[5]: -2.6999999999999999e-05
  </code></pre>
  
  <p>But I would like to get the value 0.000122 i.e. the item in <strong>position</strong> 3.<br>
  How can I do this?</p>