This series consists of the business and personal correspondence of Edith Gregor Halpert and the Downtown Gallery. For the most part, this series is general business correspondence concerning routine activities of the Downtown Gallery, including the American Folk Art Gallery and the Daylight Gallery, both operated by the Downtown Gallery on the sam...

The J. Horace McFarland Collection includes over 3,100 photographic images of private and public gardens throughout the United States, as well as some from foreign countries, dating from 1899 to 1963. Many of these images, generated for Mount Pleasant Press (later the J. Horace McFarland Company), were used to illustrate trade catalogs published by the firm as well as journal and newspaper articles. The collection also contains color records that were used as reference aids during the printing process, plant patents, and various publications of the McFarland Company.

Papers include: diaries and extracts from diaries, account books, a scrapbook, letters received, lectures, reminiscences and brief manuscripts, field and work reports, notes on recording techniques and the preservation of Native American music, musical transcriptions, bibliographic notes, library items, tone photographs, a mouth organ (pitch pipe), and a slide rule.

The papers document the life and work of William R. Hutton, a civil engineer during the late 1800s to the early 1900s. Materials include diaries, notebooks, correspondence, letterpress copy book, printed materials, publications, specifications, photographs, drawings, and maps that document the construction of several architectural and engineering projects during this period. Most notable are the records containing information related to the construction of the Chesapeake and Ohio Canal, Hudson River Tunnel, the Washington Aqueduct, the Kanawha River Canal, and the Washington/Harlem River Bridge. There are also several records about railroads in the state of Maryland, the District of Columbia and elsewhere, including the Western Maryland Railroad, Baltimore and Ohio Railroad, Colorado Midlands Railway, Baltimore and Drum Point Railroad, the Northern Adirondack Railroad, and the Pittsfield and Williamstown Railroad. The records can be used to track the progression of these projects, and engineering innovation during the late 1800s to the early 1900s.

This finding aid was digitized with funds generously provided by the Smithsonian Institution Women's Committee.

Papers of Uriah A. Boyden (1804-1879), a Boston civil and mechanical engineer and the inventor of the Boyden turbine. Materials include correspondence, notes, calculations, articles, notebooks, legal documents, financial documents, patents and patent assignments, design drawings, newspaper clippings, pamphlets, business cards, and a print of a daguerreotype.

This collection consists of the archives of Giuseppe M. Bellanca and his company, including the following types of mediums: drawings, stress analysis tests, reports, photographs/negatives, documents, correspondence, patent information, newspaper clippings, business records, and financial statements.

The Walt Kuhn Family papers and Armory Show records measure 31 linear feet and date from 1859 to 1984, with the bulk of material dating from 1900 to 1949. Papers contain records of the legendary Armory Show of 1913, also known as the International Exhibition of Modern Art, which introduced modern European painting and sculpture to the American public. Papers also contain records of the Association of American Painters and Sculptors (AAPS), the artist-run organization that mounted the Armory Show; records of the New York artists' clubs the Kit Kat Club (founded 1881) and the Penguin Club (founded 1917); and the personal and family papers of New York artist Walt Kuhn (1877-1949), one of the primary organizers of the Armory Show.

The Philip Van Horn (P. V. H. ) Weems Papers contain 79 cu. ft. of materials related to his life and career.

These records document Riccardo Giacconi's professional career, and consist of papers illustrating his scientific work and administrative records relating to the institutions at which he worked. There is extensive documentation of Giacconi's professional activities, including meetings attended, papers presented (and published), his services a...