Joanna Stephens

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. Provided by Wikipedia