We continue with research by Joseph Black, Henry Cavendish, and Joseph Priestley, concerning new "airs". Then there is the work by Karl Scheele, which was delayed being published, and Mikhail Lomonosov, which was generally ignored. Finally we reach Marie-Ann Paulze and Antoine Lavoisier, who created modern chemistry by realizing that phlogiston is bogus and water is not an element. We have a guest speaker, Dr. Martin Rosenberg, on the scientific art of Joseph Wright of Derby and a Jacques-Louis David's massive portraits of the Lavoisier couple. For links to images referred to by Dr. Rosenberg, become a Patreon supporter at https://www.patreon.com/thehistoryofchemistry

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