The Emmet Mercury Boiler Records contains information about General Electric Company and Hartford Electric Light Company's development, installation, and use of William Le Roy Emmet's mercury boiler units. The mercury boiler units used mercury fluid along with steam power to improve cycle efficiency in converting coal or oil to electric power. The collection contains articles, news clippings, reports, instruction manuals, log books, data sheets, photographs, and drawings related to the experimental unit installed at Dutch Point, Connecticut, and the first commercial use of a mercury boiler at the South Meadow Station in Hartford, Connecticut.

The Perry H. Wheeler Collection includes the design, client and business records of Perry H. Wheeler, a landscape architect best known for his work on numerous townhouse gardens in the Georgetown neighborhood of Washington, D.C., during the 1960s as well as the redesign of the White House Rose Garden in collaboration with Rachel Lambert ('Bunny') Mellon during the Kennedy administration.

The papers of Helen M. Duncan document her career with the USGS and her research on fossil Bryozoa. They include incoming and outgoing correspondence with colleagues mostly concerning the identification of specimens; reports on specimens examined; and notes, lists, drafts of papers, and related materials from her research.

These are the papers of Jackson Miles Abbott, noted bird watcher and authority on the American bald eagle. Papers include records of his bird sightings, his work on the preservation of the bald eagle, extensive notes on Virginia birds, as well as birds of other parts of the world, and his work to preserve Dyke Marsh.

The papers of modernist painter and activist Harold Weston (1894-1972) date from 1894 to 1978 and measure 24.3 linear feet. The papers focus on Weston's painting career and his involvement with humanitarian and artistic causes. Found are biographical materials, correspondence, personal business records, association and organization records, commission and project files, materials relating to Weston's book Freedom in the Wilds, writings, artwork, printed materials, two scrapbooks, and photographs.

The records of the American Ethnological Society (AES) document its activities from its founding in 1842 through the mid-1960s. The American Ethnological Society is the oldest anthropological association in America. It has been interested in publishing and promoting study of different cultures in the Americas from its founding in 1842 to the present. Materials include correspondence, reports, and financial records relating to the administrative functions of the organization.

These papers document Preble's personal life and careers with the Bureau of Biological Survey and the American Nature Association, and include general correspondence, primarily incoming; published and unpublished manuscripts for scientific and conservation work; addresses and reports by others; field notebooks, diaries, lists and checklists ...

The papers of Jerome Blum measure 3.0 linear feet and date from 1915 to circa 1969, with the bulk of the material dating from 1919 to 1935. Biographical material, correspondence, writings and notes, printed material, artwork, and photographs document the painter's personal and professional life, and extensive travels.

The papers of Henry Varnum Poor measure 12.9 linear feet and date from 1873-2001, with the bulk from the period 1904-1970. Correspondence, writings, artwork, printed material and photographs document Poor's work as a painter, muralist, ceramic artist and potter, architect, designer, writer, war artist, educator and a co-founder of the Skowhegan School of Painting and Sculpture. Also found is extensive information about the design and construction of Crow House, his home in New City, New York, commissions for other architectural projects, and his personal life.

The papers of Philadelphia painter Arthur B. Carles measure 0.92 linear feet and date from 1912 to 1983. Found are biographical materials, correspondence, writings and notes, personal business records, printed materials, and photographs.