Fifty-eight titled photographs taken by Sir Robert Cotton, of scenes along the C & O Canal, including locks, acqueducts, canal station; and cyclists and joggers along the towpaths.

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 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.

A New York bookseller, Warshaw assembled this collection over nearly fifty years. The Warshaw Collection of Business Americana: Canals forms part of the Warshaw Collection of Business Americana, Subseries 1.1: Subject Categories. The Subject Categories subseries is divided into 470 subject categories based on those created by Mr. Warshaw. These subject categories include topical subjects, types or forms of material, people, organizations, historical events, and other categories. An overview to the entire Warshaw collection is available here: Warshaw Collection of Business Americana

These records document the history, operation, and activities of the ANS (before 1960, the Audubon Society of the District of Columbia). They also help to illustrate the evolution of the local and national conservation movement; environmental legislation and issues supported by ANS; the development of environmental education; and the natural ...

This collection consists mostly of incoming and outgoing correspondence documenting Cartwright's research on Coleoptera. Also included are records concerning his curatorial work at the Division of Insects, USNM, and the Department of Entomology, NMNH; field work; and professional activities. Smaller amounts of correspondence were written durin...

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.

The archivist has arranged the collection into five separate series: Series 1: CAR BUILDERS, arranged alphabetically by company or individual. Series 2: EQUIPMENT - ROLLING STOCK, arranged in two sections: alphabetically by White's heading: Articles in Progress and alphabetical by type of railroad car under White's heading: Research Files for Book ...

Approximately 11,000 images collected by Thomas Norrell consisting of original photographic prints and photographic postcards, original film and glass plate negatives, and duplicate/copy photographic prints and negatives. The majority are external views of single locomotive engines of North American railroad and industrial companies. Images of international railroad company locomotives and of representative locomotives from various locomotive works and builders are also included. The collection contains a small number of subject-specific images covering such topics as train wrecks, funeral trains, experimental locomotives, miniature trains, and locomotives at the 1933 and 1939 World's Fairs.

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.