Archived papers: volume 51, scientific papers submitted the Royal Society unpublished or abstracted, 1868-1869 Contains 14 papers and assorted documents submitted to the Royal Society, which were either not published at the time of receipt, or published in the Proceedings of the Royal Society. The papers are arranged alphabetically by author and cover the period of 1868-1869 [spine reads 1869]. Includes an index at the beginning of the volume. 1868-1869