Elizabeth Fulhame (fl. 1794) was an early chemist who invented the concept of catalysis and discovered photoreduction. She describes catalysis as a process at length in her 1794 book An Essay On Combustion with a View to a New Art of Dying and Painting, wherein the Phlogistic and Antiphlogistic Hypotheses are Proved Erroneous. The book relates in painstaking detail her experiments with oxidation-reduction reactions, and the conclusions she draws regarding Phlogiston theory, in which she disagrees with both the Phlogistians and Antiphlogistians.