These papers include correspondence from over 180 individuals, lecture notes and essays on mathematics, astronomy, and electricity, and his diaries from journeys through Germany (1798) and Switzerland (1802).

Letters collected by Whitfield J. Bell, Jr., including correspondence and papers submitted to the Society. Pertains to APS members and associations. Includes letters by Franklin, Winthrop, Endecott, Eliot, etc. Scientific and historical references, primarily. Some of the subjects discussed are astronomy, botany, electricity, natural history, and Indian missions. Also included is Roger Curtis' "Journal of the Moravian Mission to Labrador."