| Description | <p>Consists of :</p>
<li>Pearson's manuscript "On the partial correlation ratio" received by the Royal Society on 31 May 1915 and published in <i>Proceedings of the Royal Society</i>, Series A, 91, 1915, pp492-498</li>
<li>note by H E Soper and one page of Pearson's algebra</li> |