These journals, kept at Madison's plantation, also contain notes on sowing and harvesting, and migration of birds. Some notes are in Dolley Madison's hand.

These are daily observations of temperature, humidity, wind, and precipitation kept by Bartram in Philadelphia. He also notes such occurrences as "River [Schuylkill] froze over" (February 7, 1790).

Detailed notes from Alexander Wilson's "American ornithology," including item numbers from Peale's museum. Also two loose pages in vol. 1 attributed to John Abbot; Case for 2 volumes says "George Ord -- Birds of North America. Original manuscript."

Miscellaneous letters from and to Benjamin Smith Barton, Nicholas Collin, Henry Muhlenberg, Jeremy Belknap, Monsieur Le Roi, and a broadside by Robert Aitken. These letters concern botany and zoology in the U.S., England, and on the Continent, and mention contemporary figures as well as the American Philosophical Society.

This item also contains some newspapers clippings and a manuscript obituary of Julian Halliday Coxe (1833-1834), infant son of Daniel T. Coxe.

This is an extract from a manuscript and is divided into three parts. This volume puts forth the theory that the visible geological formations of the earth were formed in the depths of the ocean; it offers opinions that support this system; and then predicts the natural consequences of the loss of all living beings from the waters of the ocean.

Founded in Cap François, Saint Domingue (now Haiti) in August 1785, the Cercle des Philadelphes was one of the most prestigious colonial learned societies of the Ancien Regime. During its brief seven year existence, the Cercle pursued an agenda of promoting improvements in agriculture, manufactures, the arts and sciences, published five volumes of memoirs, and established correspondence with their peers in the American Philosophical Society and other learned societies. Their foreign membership included both Benjamin Franklin and Benjamin Rush. The Cercle des Philadelphes Collection is a small, but important assemblage of documents relating to French colonial science. Each of the documents is associated with Louis Narcisse Baudry de Lozières, the first president of the Cercle, including three certificates appointing him to office, and two important addresses. The first of these appears to be his opening remarks to the Cercle at its first public meeting on Aug. 15, 1784. The second is an early, but undated document outlining the organization of the Cercle and its aims.

This is a small group of letters written to Johann Ambrosius Beurer, J. von Sprehelson, and Christoph Jacob Trew.

This volume was copied by Philip Holbrook Nicklin, a Philadelphia author and bookseller, from portions of the "London Quarterly Journal of Science Literature and the Arts" and partly from a translation of the original, to which is prefixed a short conchological introduction, containing descriptions of the Linnean genera, & of those species, from which Lamarck has formed most of his genera.

This work contains some material on electricity. There are also 14 plates, representing the essential elements of mathematics, physics, and cosmography.

These manuscripts are in the hand of various unknown authors, and concern research and observations on the torpedo fish, which was of much interest to those studying electricity at the time. Included are copies of letters from John Walsh to Benjamin Franklin, and a copy of a Walsh and Thomas Pennant letter, read before the Royal Society (1774), concerning a torpedo fish found off the coast of England.

The first volume contains notes of expenses and of observations while surveying the western boundary of Pennsylvania (1785). Mentions APS under date of Feb. 20, 1784. The second volume contains observations that were continued after Rittenhouse's death to Sept. 30, 1805.

These papers include letters on natural history, metals and mineralogy, botany, insects, the geological survey of New York, and analyses of distilled liquors in the cause of temperance.

This is primarily a collection of letters and manuscripts sent to Wistar by prominent men who were among his many correspondents. These documents reflect his broad interests, including botany, paleontology, medicine, the American Philosophical Society, and André Michaux's plans for exploring the Missouri.

Notes kept by the Yale undergraduate John Austin Stevens on 20 lectures on natural philosophy delivered by Jeremiah Day during the fall, 1812. Includes lectures on gravitation, mechanics, and hydrostatics (hydrology), the last including theories of rivers, springs, and groundwater.

By an unknown author, this notebook is of experiments and the history of experiments with electricity, containing references to Franklin, Beccaria, and Priestley, etc.

This volume contains extracts, chiefly in an unknown hand (probably Charles Waterton), from Ord's letters, 1831-1835, criticizing Audubon as a man and as a naturalist. Ord wrote the last part of the volume (signed and dated June 29, 1838), and there are manuscript comments by Charles Waterton.

Nine of these letters are addressed to Sir Alexander Dick of Edinburgh (1763-1768), and relate to Morgan's medical studies, his travels on the Continent, and the founding of the medical department of the College of Physicians. These are copies of originals in possession of Mrs. Dick Cunyngham, Prestonfield House, Edinburgh. In addition there are letters from Morgan to: Petrus Camper, William Smith, Samuel Vaughan, Jr.; and from Peter Collinson to Camper; Camper to Morgan; S. Vaughan Jr. to Camper; and an exchange between Christian F. Michaelis and Camper. These concern Morgan, with mentions of fossils (mastodon bones in America), natural history, comments on Franklin, Jefferson, and Angelica Kauffmann. These are from originals in the Petrus Camper Papers, on deposit (1976) at the University of Amsterdam Library.