Scientist. Born at Fieldhead, Yorkshire, England, he made important contributions in the fields of education, moral philosophy, theology, metaphysics, political economy, history and physical science. He is best known for his experiments with gases, especially for his discovery of seltzer and for isolating oxygen in 1774. This intellectual works laid the foundation for that branch of science which we now call chemistry. In the 1790s, he decided to emigrate to America. He refused the offer of a chair in chemistry at the University of Pennsylvania, to experiment in his own laboratory in Northumberland. He was also a preacher and the founder of the First Unitarian Church in America. He died in Philadelphia.
Bio by: John "J-Cat" Griffith