Dr Thomas Beddoes: chemistry, medicine, and the perils of democracy.

Beddoes lectured on chemistry at Oxford in the years that included the French Revolution, the Terror, and the outbreak of war with France, as well as the success in France of the chemical revolution. The very public dispute between Edmund Burke and Joseph Priestley meant that the latter's study of different kinds of air was politically tainted. Beddoes's democratic beliefs and his support for the new chemistry of Lavoisier meant that as chemist and physician he had to deal with complaints that he was potentially seditious and pro-French. His medical theories, allied to pneumatic chemistry and building on the work of Priestley, were accordingly suspect. In spite of that, he became the physician and friend to several members of the Lunar Society of Birmingham and to members of their family, and they in return became his patrons. His collaboration with James Watt was crucial for his development of pneumatic medicine. The full extent of Lunar patronage, and especially that of James Keir and Thomas Wedgwood, has hitherto not been recognized, but it was the concealed scale of that patronage that made possible the execution of Beddoes's ambitious programme of treatment and research.