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.

Three volumes contain letters, laws, charters, reports, proclamations, petitions, and other official and semi-official documents relating principally to early Pennsylvania and New Jersey, signed by or addressed to William Penn, among others. A fourth volume is Penn's cash book, 1699-1703, which records expeditures, payments of quit rents, etc. Tipped in is "Catalogue of Goods left at Pensbury," and of goods left at Philadelphia, 1701.

A pioneer biochemist, Carl Neuberg (1877-1956) spent over thirty years of his productive career as a professor at the University of Berlin (1903-1937) and as Director of the Kaiser Wilhelm Institutes of Biochemistry and Experimental Therapy. His varied research interests resulted in important contributions to the understanding of fermentation processes, solubility and transport phenomena in cells, the chemistry of carbohydrates, sugars, enzymes, and amino acids, and photochemistry. Neuberg was forced out of his position after the Nazi rise to power, and taking refuge in the United States. For the last several years of his life, he worked at New York University. The Neuberg collection consists of correspondence, lab notebooks, documents, photographs, and reprints, nearly all dating from after Neuberg's departure from Germany in 1940. The correspondence documents Neuberg's late-career work and the contacts he developed with American chemical manufacturers and industries involved in fermentation, as well as the burgeoning post-war relationship between scientific research and the federal dollar. Files for the American Cancer Society, U.S. Atomic Energy Commission, and the U.S. Public Health Service in particular contain useful information for study of the politics and mechanics of government grants.