Unpublished translation, 'On lithotrity' by Baron [Charles Louis Stanislas] Heurteloup Heurteloup writes on the importance of and reasons for lithotrity, an operation to remove bladder stones by reducing them to a powder to allow them to pass naturally. He describes the way the operation is typically done, and then discusses his improvements to the accepted method, drawing on his own observations and experiments. Minor corrections and deletions appear throughout in ink. Subject: Surgery Communicated by Joshua Brookes. Read to the Royal Society on 17 June 1830. Whilst the Royal Society declined to publish this paper, Heurteloup did publish it as part of a larger work in 1831: Heurteloup, Charles Louis Stanislas. 'Principles of lithotrity; or a treatise on the art of extracting the stone without incision.' London: Whittaker, Treacher, and Co, 1831. [1830]