Note on "The approximate solution of various boundary problems".

"The approximate solution of various boundary problems by surface integration combined with freehand graph", by L F Richardson was published in the Proceedings of the Physical Society of London, v23 pt 2 15 February 1911. Richardson's collected papers, donated by him to the Royal Society, are extensively annotated. Here, a sheet of additional manuscript notation (in Richardson's hand) has been folded into the paper.