These volumes contain calculations and drawings of an eclipse of the sun, 24 June 1778, and of the moon, 29 May 1779, adjusted to the meridian of Philadelphia. There is also an incomplete duplicate of the calculations for the sun, and a duplicate of the calculations for the moon. An apparently personal reference in the text suggests that Freehauff was a native of Germany.

Born in Stuttgart in 1792 and educated at the University of Tübingen, Julius Eugen Schlossberger was one of the pioneers of physiological chemistry in Germany. Unorganischen Chemie is a thorough discourse on inorganic chemistry and metallurgy, presumably relating to lectures given at the University of Tübingen, with an extrensive section on the physical properties, chemistry, and analysis of Eisenmetalle ("iron metals"). The volume includes three small drawings of experimental apparatus.

These are twenty-six plates, created by Miss Williamson and E.A. Bowles, that feature colored drawings of various types of crocuses.

This collection includes correspondence, drawings, and publications of Quekett. He became the conservator at the College of Surgeons, and through his microscopial research had a wide influence on anatomical studies as conducted by the medical profession in Great Britain. These papers concern Quekett's studies and medical matters in general. The correspondents include James Hilton, Julian S. Huxley, John Pethereck, Sir James South, and Thomas Wormald.

This volume was compiled in Egypt, where Gliddon lived for 23 years, and was copied from his original manuscripts for Samuel G. Morton by Edward M. Kern in Philadelphia in 1842. It includes drawings and illustrations.

An analysis of the material culture of one of the eight extant Mexteca codices, Codex Borgia: a Mesoamerican ritual and divinatory manuscript. Some knowledge of the Nahuatl language will help with interpretation.

These are copies in an unknown hand [the name "Meriel Nevill Watt" appears in the front of the volume] of letters, primarily from Ellis, that were published in the "Philosophical Transactions" of the Royal Society in London. Most relate to botanical topics, and many are written to Peter Collinson. A few are written by Peter Woulfe. Included are contemporary engravings from the "Transactions," as well as original wash drawings copied from the engravings.

An analysis of the material culture of one of the eight extant Mixtec codices, Codex Vindobonensis Mexicanus I.

These are copies of letters and printed and mimeographed reports relating principally to breakwaters at Aransas Pass, Texas, and Manasquan Inlet, N.J. There are also 12 blueprints and 7 drawings of devices for reclaiming beaches.

These notebooks contain lectures or reports on lectures, with corresponding watercolor and pen-and-ink drawings. There are volumes on geology (Great Britain and elsewhere), natural history, mechanics (sketches of levers, valves, and weighing machines), and steam engines (sketches of mechanics of boilers).

This collection contains color slides of drawings and watercolors on vellum made by Lesueur in 1799, when he accompanied Baudin and Francois Péron on their scientific expedition to Australia. The microfilm is of Lesueur's American sketchbooks.

A Polish-born mathematician who worked in symbolic logic, set theory and computation theory, Emil Leon Post received his doctorate from Columbia in 1920 for a dissertation proving the consistency of the propositional calculus described in Whitehead and Russell's Principia mathematica. He joined the faculty at City College of the City University of New York in 1932, where he remained until his death in 1954. Although illness continually interrupted Post's career, he made important contributions to the concepts of completeness and consistency and to recursive functions, foundational to modern computing theory. In 1936, he introduced the concept of a "Post machine," a sort of precursor to the von Neumann's notion of a program. The Post Papers consist of 8 linear feet of professional correspondence, research notes, and papers, to which have been added a small number of items of biographical interest.