This volume contains "solutions of the practical problems in [John] Gummere's astronomy."

Charles Morton's "System of Physicks" was among the most important texts in natural philosophy in early America, used to teach science and the scientific method to students at both Harvard and Yale from the late 1680s through the 1720s. This fair copy was probably transcribed at one of those institutions in about 1700, and is a fairly complete accounting of Morton's best known work.

A. Sager's brief notes provide an outline for a course of chemistry lectures, ca.1810. The notes, in Swedish, include sections on electricity and phlogiston.

This volume begins with lecture number 23 (1826 December 13) and ends with number 59 (1827 February 21) of Silliman's lectures at Yale College.

These contain a few notes and memoranda by Van Vleck, but the bulk of the collection is letters to and from him. Correspondents include Raymond T. Birge, Gerhard H. Dieke, Paul A. M. Dirac, Edwin C. Kemble, and Robert S. Mulliken.

This item is a book of calculations, including problems in the elements of astronomy; the calculations of lunar eclipses at Philadelphia, 1747-1761, and of solar eclipses in 1744 and 1752; and Halley's tables of the sun and moon.

The first volume contains mathematical problems, which appear to be college exercises (1814); the second volume is an essay on the projection of the sphere and spherical trigonometry, including an appendix on astronomy (1812); and the third volume is a lecture on natural philosophy, apparently prepared for delivery [n.d.].

This volume contains calculations of the distances of stars, eclipses, and longitude, made by William Maule, James Cresson, Joseph Jeanes, James James, and Robert Hutchinson, pupils in the Friends Academy, where Roberts was a teacher.

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.

These classroom notes, taken by an unidentified student, present the state of knowledge in natural philosophy, especially astronomy, during these years. There are mentions of many contemporary scientists, and much on Newton and Newtonian philosophy.

These are notes of lectures and experiments made at Paris as a student at the Jardin des Plantes. The volumes are entitled: Botany & Agriculture (with a large portion actually on electrical machinery); Trees and Shrubs; Chemistry, Physics, Mineralogy; and Zoology.

An early Welsh emigrant to Pennsylvania, David Evans was educated at Yale (1713) before answering the call to Presbyterian pulpits in the Welsh Tract of Delaware and Pennsylvania, and to the church at Pilesgrove, N.J. Written entirely in Latin in 1747 when Evans was 66 years old, the Aliquot Rudimenta Physicae consists of four separate compendia bound together, the Compendium Technologiae, Logicae, Rhetoricae, and Physicae. The work is an interesting and thorough attempt to summarize a system of knowledge with impeccable American provenance.

These notes were kept by Ewing of medical lectures he attended, given by Drs. Nathaniel Chapman, John R. Coxe, and Philip S. Physick. The lectures concern fevers, materia medica, surgery, and diagnosis.

Notebook of Henry Dilworth Gilpin for a course on natural philosophy at the University of Pennsylvania, ca.1819, with additional notes on mathematics. The professor for both courses was probably Robert Maskell Patterson.

Louis Hasbrouck was in his last year at Princeton in 1796-1797 when he attended the course of chemistry lectures given by John Maclean. In only his second year at Princeton, Maclean was rapidly becoming known for introducing the latest currents in chemical theory, including the system of Antoine Laurent Lavoisier, and he was one of the first Americans to insist that students take part in active experimentation. Louis Hasbrouck was in his final year at Princeton in 1796-1797 when he attended John Maclean's lectures on chemistry. His notebook from the second half of that course includes a detailed record of the lectures from January 24-March 14 and June 22-24, 1797, covering Maclean's discussion of the chemistry of metals, "chemical combination," combustion, and botanical chemistry. Although his notes are not complete, Hasbrouck was enrolled at a singularly interesting period in the history of American chemistry. This was only the second time that Maclean had offered his course, in which he introduced the new chemical system of Lavoisier, and it includes a relatively complete version of Maclean's most important lecture, "Of combustion." This devastating attack on Joseph Priestley and phlogistic theory appeared in print in 1797 as Two Lectures on Combustion: Supplementary to a Course of Lectures on Chemistry.

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

These are primarily papers relating to the work of the United States Army Corps of Topographical Engineers, with special reference to surveys of harbors of the eastern United States. Some papers and letters relate to natural history and are addressed to John Lawrence LeConte. Correspondents include Rutherford B. Hayes, Joseph Henry, Daniel Parker, and E.G. Squier.

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.

This journal was kept while Shippen was a student of medicine in London under Dr. Colin McKenzie and Dr. William Hunter. Notable people mentioned are Dennys De Berdt, Mark Akenside, George Whitefield, John Fothergill, David Garrick, and Thomas Penn.

Benjamin Silliman (1779-1864, APS 1805) was a scientist and educator. As a professor of chemistry at Yale University from 1802 to 1853, and pioneering teacher of chemistry, mineralogy and geology, Silliman was largely responsible for the conversion of Yale College to Yale University, with strong medical and scientific departments.