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.

The collection documents Mongomery C. Meigs, an Army officer, engineer, architect, and scientist. Meigs's papers include scrapbooks and photographs relating primarily to his work on the Pension Building and the Washington Aqueduct in Washington, D.C. but also his interest in politics, military affairs, construction, Native Americans, inventions, real estate, and financial matters.

This collection consists of two photograph albums and a number of individual photographs (tintypes and cabinet prints, all portraits), from the turn of the century to approximately 1918. The cabinet prints are from Pennsylvania and Ohio studios. Most of the snapshots seem to have been taken in and around Washington, D.C.

The collection consists of correspondence, invoices, drawings, photographs, and negatives and other printed literature documenting the Baltimore and Ohio Railroad from its inception in 1827 to its merger with the Chesapeake and Ohio Railroad in the 1960s.

The Scurlock photographic studio was a fixture in the Shaw area of Washington, D.C. from 1911 to 1994, and encompassed two generations of photographers, Addison N. Scurlock (1883-1964) and his sons George H. (1920- 2005) and Robert S. (1916-1994). Subseries 4.12 materials primarily document clients of the Scurlock Studio that were organizations and the images depict those groups' and organizations' activities. An overview to the entire Scurlock collection is available here: Scurlock Studio Records

Papers documenting the farming and family life of the Robinson family of Prince George's County and after 1975, Charles County, Maryland. Papers documenting the farming and family of the Via family of Greene County, Virginia, Washington, D.C., Prince George's and Calvert Counties, Maryland, by 1949.

The collection documents the creative, technical and political aspects of managing WANN Radio Station in Annapolis, Maryland during the mid-Twentieth Century. Key areas of research include black radio stations; Annapolis African American communities; marketing to Black communities; political activism through media; Black-Jewish community relationships; church, community and media activism.

The records document the work of consulting engineers and bridge builders, Ralph Modjeski (1861-1940) and Frank Masters (1883-1974) of Harrisburg, Pennsylvania.

This collection consists of postcards gathered by Dr. Victor A. Blenkle, a twentieth century physician. The postcards primarily concern geographical locations and landmarks in the United States and Western Europe, but also include materials from six other continents.

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.