Paper, 'Some observations upon Dr Eaton's styptick' by Dr [Conrad Joachim] Sprengell [Sprengwell] Sprengwell describes the history of the development of styptics, including [Claude Adrien] Helvetius' 'medicinal ball', for which he provides instructions. He goes on to discuss Dr Eaton's balsamic styptic and his own experiments using this styptic and that of Helvetius to stop bleeding in dogs, determining that neither was superior to the other. A short postscript, also published with this paper, is found at CLP/11ii/6. Subject: Medicine Published in Philosophical Transactions as 'Some observations upon Dr. Eaton's styptick. By Dr. Sprengell, R. S. S. Coll. Med. Lond. Lic'. Read to the Royal Society on 4 June 1724. [1724]