Alfred J. Lotka (1880-1949), a statistician for the Metropolitan Life Insurance Company, was a significant contributor to the field of demography. He was a pioneer in the study of population dynamics and conducted research on the mathematical theory of evolution and the mathematical analysis of populations. Lotka's papers document his scholarship and his involvement in professional organizations and include drafts of his works, his notes and research materials, and correspondence.

Princeton University's School of Engineering and Applied Science is an academic unit which since 1921 has overseen the curriculum and administration of the University's academic departments in the engineering sciences. The records document the activities of the School of Engineering and its subordinate departments and programs from its origins in the late 19th century until the present, and consist of correspondence, subject files, research reports, photographs, and other audiovisual materials.

The Department of Chemistry at Princeton University dates back to the early days of the College of New Jersey, and today it is one of the University's largest undergraduate concentrations. The collection contains examinations and grade books, records pertaining to chemistry research performed at the department in support of the U.S. Manhattan project and departmental records.

The Princeton Nassoons are a close-harmony, all male, student a cappella group that formed in the late 1930s. The collection consists primarily of the Princeton Nassoons' original musical arrangements and correspondence.

The collection illustrates the literary career of American author and professor Carl Van Doren, including typescripts and research notes for his Pulitzer Prize winning biography of Benjamin Franklin. The collection also contains various documents, including Van Doren's will, souvenirs, memorabilia, photographs, clippings, and printed material, as well as legal papers and correspondence dealing with his participation in several lawsuits involving copyright infringement.

The L. Ashton Sly Collection of Musical Scores is a 137 volume collection of vocal scores and/or libretti for one hundred twenty-three musical comedies, comic operas, and operettas, including twenty-eight full production promptbooks. These are arranged alphabetically by title and housed in 8 record center cartons.

This collection documents the life and activities of Sylvia Beach (1887-1962), the American author, publisher, and owner of the Paris bookshop Shakespeare & Company, the Paris bookshop that was a meeting-point for French, English, Irish and American writers during the 1920's and 1930's. The collection consists largely of files relating to Shakespeare & Company; Beach's writings and translations, in particular her memoir Shakespeare & Company ; and files relating to the circle of artists and writers surrounding her throughout her life. Included are family, personal, and business correspondence; business records of Shakespeare & Company; personal and family records; manuscripts and artwork by members of her circle; photographs; and memorabilia.

Consists of the records of The Hudson Review, one of the most notable and influential American literary quarterlies of the post-World War II era. Reflecting the history of this New York City-based magazine, the bulk of material dates from 1947 to 2014. In addition, there are extensive personal and family papers of founding editor Frederick Morgan (1922-2004), who was also a published poet and translator.

Consists of a closed collection of more than 5,000 Western Americana photographs, consisting mostly of documentary photographs of the Trans-Mississippi West from the late 1860s to early 1900s, largely from the perspective of white photographers and settlers. Subjects include American Indians (especially studio portraits), natural wonders, cities, towns, buildings, and economic activities (mining, railroads, logging, and agriculture). Some photographs relate to the Indigenous populations of Mexico and Central America. The dimensions, physical formats, and photographic processes of the photographs vary widely.

Consists of material from and about the exhibitions held by the Special Collections in Firestone Library, primarily concerning subjects relating to American and English literature and art.