The records of the Downtown Gallery date from 1824 to 1974 (bulk 1926-1969) and measure 109.56 linear feet. The records present a comprehensive portrait of a significant commercial gallery that operated as a successful business for more than forty years, representing major contemporary American artists and engendering appreciation for early American folk art. There is an unprocessed addition to this collection dating circa 1970 of a single financial/legal document.

The Staempfli Gallery records measure 5.2 linear feet and date from 1958 to 1992. Scattered administrative and financial records, correspondence, sales invoices, inventory records, and exhibition catalogs document the business activities of this New York gallery.

Original documents and papers generated by William J. Hammer and by various companies and individuals with whom he was associated. Includes material related to the research and inventions of Edison, Bell, Tesla, the Curies, etc.

The collection consists primaily of photographs and films created by the National Cotton Council (NCC) to document cotton production and use and to support the advocacy and educational work of the organization.

The Smithsonian Speech Synthesis History Project, conducted by H. David Maxey from 1986 through 2002, created a collection of archival materials documenting the history and development of speech synthesis technology. Maxey collaborated with Dr. Bernard Finn, Elliot Sivowitch and Harold Wallace of the National Museum of American History's Division of Information, Technology, and Society.

This collection consists of six feet of material documenting Porter's many scientific contributions. The following types of material are included: photographs, lecture notes, correspondence, trip notes, newspaper clippings, symposium programs, papers, and periodicals, circa 1930s-1980s.

The papers of New York City art critic, writer, and lecturer Forbes Watson date from 1840-1967 with the bulk of materials dating from 1900-1960 and measure 13.92 linear feet. Found are biographical materials, correspondence, business records relating to the Arts Publishing Corporation, records documenting Watson's work for the Public Works of Art Project and the Section of Painting and Sculpture, reference files, an exhibition file from the Pepsi-Cola Company's Third Annual Exhibition, writings and notes, ten scrapbooks and loose pages, printed materials, and photographs.

The papers of New York City and Berlin, Germany based multi-media and conceptual artist Matt Mullican measure 27.8 linear feet and date from circa 1968-2017. The collection consists of biographical material, including a few interview transcripts; correspondence; over 100 notebooks; gallery and exhibition files; project and commission files; personal business records; printed material; and photographs. The notebooks document nearly five decades of Mullican's work process and illustrate his material and conceptual explorations. Large sequences of gallery and exhibition files, as well as project and commission files comprise the remaining bulk of the collection, providing detailed documentation of his professional career, particularly from the 1980s-2000s.

The papers of social realist painter, photographer, illustrator, printmaker, and teacher Ben Shahn (1898-1969) measure 24.8 linear feet and date from 1879-1990, with the bulk of the material dating from 1933-1970. The bulk of the collection consists of over 14 linear feet of incoming letters from artists, writers, colleagues, publishers, art organizations, galleries, and universities and colleges. Also found are biographical materials, project and source files, printed material, artwork by Shahn and others, photographs taken of and by Shahn, interview transcripts, sound recordings of interviews and a motion picture film.

The records of Milch Gallery measure 42.5 linear feet and date from 1911-1995. Edward Milch (1865-1953) opened the Edward Milch Gallery in New York City. In 1916, he formed a partnership with his brother Albert Milch (1881-1951), a gilder and framer, creating E. & A. Milch, Inc., a gallery specializing in American art. Harold C. Milch (1904-1981), Albert's son, was appointed a partner in 1944 and continued the business until his death. Business records of Milch Gallery, 1911-1968, include correspondence, sales records, inventories, financial records, printed matter, photographs, and legal documents. Later additions to the records date from 1922-1995 and include correspondence; artists' files; financial, sales, and stock records; printed material; and photographs.