Correspondence of Joseph Priestley, scientist, Unitarian minister, and republican theorist. The collection includes 41 letters written to John Vaughan, 1791-1800, 5 letters to other correspondents, and manuscripts and photostats of 68 items in the Municipal Library, Warrington, England, on theological issues, the internal development of the United States, the French Revolution and its aftermath, Unitarianism, science, his publications, and American Philosophical Society.

This collection of correspondence and documents focuses on Roughton's prolific life's work on respiratory physiology. His specific work at Cambridge University from the 1920s to the 1960s, as well as interludes in the U. S. during World War II, are covered, as is the scientific milieu in which he worked. Some of the subjects or organizations for which there are documents, are: Bermuda and Naples Zoological Research Stations; British Glue and Gelatin Research Assoc.; Biochemical Journal; Cambridge Philosophical Society; Cambridge University Departments of Physiology (pre-1939) and Colloid Science (post-1940); Harvard Fatique Lab.; Medical research Council; Trinity College Cambridge.