This correspondence, concerning botanical topics, includes lists of plants.

This collection includes miscellaneous letters and drafts of letters; genealogical notes, medical essays, copies of letters and essays sent to newspapers and magazines; bills and receipts; invitations; military and other commissions; and a biographical memoir of General John Lacey, 1823. There are also papers, principally official, of his son Lieut. B. S. B. Darlington, U.S.N.

This typed autobiography, covering the period from Barus' birth to 1930, includes reports concerning the United States Geological Survey, the United States Weather Bureau, and Barus' work in cloud condensation.

This is professional correspondence to and from Sabine and numerous scientists, including H. Lloyd and James C. Ross.

These papers include letters from Admiral C.R. Moorson, correspondence with James Ross and Edward Sabine concerning polar exploration, and a map of the stars near the North Pole.

From the original manuscript held at the Friends Historical Library, Swarthmore College. Contains drafts of this Civilization of the Indian Natives (Philadelphia, 1830). Described by George S. Snyderman, "Halliday Jackson's Journal of a Visit Paid to the Indians of New York (1806)," APS Proc. 101 (1957): 565.

The journal contains an account of a visit to the Indians of New York State.

The papers, from originals in the Archives of Foreign Ministry, U.S.S.R., contain mostly correspondence, with a few printed statements and articles.

These sixteen letters are principally to Sarah Franklin Bache, Joseph Galloway, and William Strahan.

There are nine items on this reel, including letters concerning Indian affairs at Detroit, Indian lands and surveys of Moravian Indian lands on the Muskingum (with maps), estimates of settlers north of the Ohio (1793), and a report concerning the conduct of the British respecting the Indian war (1793).

Twelve reels of letters, diaries, minutes, reports, speeches, accounts, and other archival material of missionaries and individual Quakers, 1791-1908. Includes: Minutes of the Committee for Promoting the Improvement and Gradual Civilization of the Indian Natives (1795-1895), Minutes of the Friendly Association for Regaining and Preserving Peace with the Indians by Pacific Measures (1756-1891); miscellaneous papers of teachers, pupils, visitors to Tunessassa Indian School, Quaker Bridge, New York, mostly twentieth century.

These are eighteen letters that mostly concern Indian linguistics. Regarding Zeisberger's Onondaga grammar and dictionary; Heckewelder's writings on the Indians; publications; question of whether or not any of the Lenape can pronounce the letter "r."

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 papers include diplomas, testimonials, and letters from Benjamin Rush.

This contains records of Hayes and his sons who were in the Cuban and Caribbean trade up to ca. 1810. Thereafter, the sons carried out the actual voyages, and Patrick Hayes remained in Philadelphia as a commission merchant.

These forty-five letters concern legal and political matters, Indian languages and linguistics, philological matters, and the American Philosophical Society.

Letters dated post-1792 are from Francis Kinlock to "Prevost."

Correspondence with Philadelphia institutions, from Accademia delle Scienze. Letters, principally of a formal character, from the APS, Academy of Natural Sciences, Wistar Institute, Wagner Free Institute of Science, and other learned societies and institutions; also a letter from John Vaughan to Prospero Balbo, 1832; with drafts of some replies.

These papers include correspondence and reports of proceedings concerning Indian affairs. Miscellaneous materials, mostly 1778-1791, of Timothy Pickering, Henry Knox, William Hardenburgh, John Taylor and others. Includes 94 pages, account of meeting with the Indians at Fort Stanwix, New York, June 1, 1790, and 47 pages of miscellaneous material.