Nathaniel Mathis is a Washington, D.C., hairstylist, inventor, motivational speaker, and entrepreneur. His papers document his business life and community involvement.

The papers document Leo H. Baekeland, a Belgian born chemist who invented Velox photographic paper (1893) and Bakelite (1907), an inexpensive, nonflammable, versatile plastic. The papers include student notebooks; private laboratory notebooks and journals; commercial laboratory notes; diaries; patents; technical papers; biographies; newspaper clippings; maps; graphs; blueprints; account books; batch books; formula books; order books; photographs; and correspondence regarding Baekeland, 1887-1943.

Papers relating to Catherine Hann's life in Vietnam (1953-1981), her flight by boat to Malaysia and stay at Pulau Bidong refugee camp (February --September 1981), her immigration to the United States (September 1981), and her work in Maryland as a circuit board assembler, manicurist and esthetician.

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 papers of New York gallery owner and art dealer David Herbert measure 5.8 linear feet and date from circa 1909-1996, with the bulk of the material dating from 1945-1995. Herbert's papers document his years working for Betty Parsons Gallery, Sidney Janis Gallery, Graham Gallery, and others; the operation of the David Herbert Gallery from 1959-1962; Herbert's partnerships and agreements with Richard Feigen and others; and his activities as an independent dealer. Records include biographical material, correspondence, notebooks, subject files, artist files, exhibition files, business records, printed material, and photographs.

Series Three, Speeches and Lectures, contains Caples' speeches to advertising industry associations and other business organizations, as well as a series of lectures prepared for a college course on advertising techniques that Caples taught at Columbia University Graduate School of Business during the 1953-54 academic year.. Series Four, Client Fi...

The collection dates from 1678 to circa 2005 and consists of 58 maps, engravings, posters, original documents and photographs related to East, Central and South Africa. There is a special focus on Ethiopia (Abyssinia), Tanzania and the Sudan, and the collection's subjects include East African geography, history, political affairs and African leaders, as well as European (German, Italian, British) and American colonization, exploration and warfare in Africa.

The collection documents in photographs, scrapbooks, notebooks, correspondence, stock ledgers, annual reports, and financial records, the evolution of the telegraph, the development of the Western Union Telegraph Company, and the beginning of the communications revolution. The collection materials describe both the history of the company and of the telegraph industry in general, particularly its importance to the development of the technology in the nineteenth and twentieth centuries. The collection is useful for researchers interested in the development of technology, economic history, and the impact of technology on American social and cultural life.

The collection consists of 109 scrapbooks of newspaper clippings assembled by Julian Black, manager of Joe Louis, heavyweight boxing champion from 1937 to 1949. They document Louis's career from 1935 to 1944.

The collection consists of approximately 28,000 photographic negatives, slides, prints and other materials documenting Bethlehem Steel Corporation's iron ore mining operations. The photographs were taken by Richard "Jay" Angelo, a Bethlehem Steel Corporation photographer. The majority of the photographs depict Bethlehem's mining operations at its Cornwall and Morgantown, Pennsylvania mines. A smaller number of negatives document operations in western Pennsylvania, Kentucky, West Virginia, Michigan and Ontario. The negatives depict aerial views, blasting operations, tunneling, equipment and infrastructure, machinery, employees working, company personnel, and company-built community facilities. The collection documents the complete operations of a major, historic mining operation over four decades.