Paper, 'On the minute structure of striped muscle, with special reference to a new method of investigation, by means of "impressions" stamped in collodion' by John Berry Haycraft Haycraft writes: 'Curiously enough many of the early microscopists—Schwann for instance—recognised that the fibrils of a muscle are not simply threads of uniform thickness, like those of connective tissue: they were able to demonstrate their varicose character, even with the imperfect lenses at their command.' Annotations in pencil and ink. Subject: Physiology Received 2 January 1891. Read 8 January 1891. Communicated by Edward Emanuel Klein. A version of this paper was published in volume 49 of the Proceedings of the Royal Society as 'On the minute structure of striped muscle, with special reference to a new method of investigation, by means of "impressions" stamped in collodion'. [1890-1891]