Paper, 'On a new constituent of the blood and its physiological import' by L C [Leonard Charles] Wooldridge Wooldridge writes: 'I published last February in the Proceedings of the Society a paper on the origin of the fibrin ferment in which I shewed that a body exists dissolved in the plasma which can give rise to fibrin ferment [see PP/4/34]. I have proceeded with my investigations, and have succeeded in making some additions to our knowledge of th is subject, which I here describe.' Annotations in pencil and ink throughout. Subject: Physiology / Haematology Receibed 16 December 1884. Read 18 December 1884. Communicated by Michael Foster. A version of this paper was published in volume 38 of the Proceedings of the Royal Society as 'On a new constituent of the blood and its physiological import'. 1884