Joanna Stephens or Mrs. Stephens (? – 6 August 1774) was a British inventor of a medicine for bladder stones. After proving its efficacy she was paid £5,000 for revealing the recipe by the UK parliament. Her remedy was used and analysed in England and in France. Investigations inspired by her work may have been a basis for development of modern biochemistry. (From Wikipedia)
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Stephens, Joanna, -1774: A Most Excellent Cure for the Stone and Gravel (London: Printed for the benefit of mankind in general, ca. 1740) (page images at NIH)
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