| Description | Two notebooks labelled "Analogue mechanisms of living processes"; typescripts, offprints and galley proof of "A Self-reproducing Analogue" by L S Penrose and R Penrose, published in <i>Nature</i>, volume 179, 8 June 1957; manuscript notes and diagrams; and papers relating to a demonstration of Penrose's reproduction model at the Institute of Biology's Conversazione, 1957. |