These papers include material relating to Hartley's activities before and during the American Revolution and at the peace conference. Benjamin Franklin is included among the correspondents.

These papers include letterbook copies of two letters to Benjamin Franklin, and a paper on colds that Perkins inscribed for Franklin, "A few thoughts on epidemic colds or catarrhal fevers" (1768).

These are letters of Mary Stevenson Hewson to her mother-in-law, sister-in-law, and children, and their letters to her. Of special note are the letters from Thomas Tickell Hewson in London and Edinburgh. There are also letters and papers of William Hewson, including letters from Anthony Fothergill, John Morgan, and Williams Smibert, and letters about Mary Stevenson Hewson's estate. There are many references to Benjamin Franklin, Benjamin Franklin Bache, Jonathan Williams, John Hawkesworth, and others.

These papers related to Benjamin Franklin and the American Philosophical Society, and include correspondence among Benjamin Franklin, William Franklin, Jonathan Williams, Sr., and Jonathan Williams, Jr. Also included is Williams' journal of a trip through England with Benjamin Franklin, Jan Ingenhousz, and John Canton (1771), memoranda and essays by Williams on trade, meteorology, and sugar refining, and notes and drawings.

This is a miscellaneous collection of manuscripts (ca. 35 items) from the British Museum, selected for filming by Whitfield J. Bell, Jr. Included are letters, botanical lists, illustrations, and other types of documents.

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 Scientific and historical references, primarily.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."

These materials relate to topics such as agriculture, botany, and commerce. Also included are extracts from minutes and committee reports.

This collection is comprised of materials from seven repositories and includes correspondence from Banks' colleagues and explorers, such as John Hope, Josiah Wedgwood, Georg Forster, and Captain William Bligh; records of expenses for voyages and journeys; and journals kept during voyages to New Foundland and Labrador (1766) and around the world with Captain James Cook (1768-1771). Topics include botany and horticulture, marine life, and collecting specimens.