Paper, 'About the volatile salt of humn [human] blood and the bark' by Dr [Frederick] Slare Paper regarding an experiment made by mixing an infusion of Cortex peruvianus [Jesuit's bark] and vinegar with volatile salt from human blood to see if any fermentation took place. It did, but when chalk was added to the mixture it prevented fermentation. Subject: Chemistry Read to the Royal Society on 25 July 1683. [1683]