Photoprints and negatives documenting the construction of several Washington, D.C. bridges. The Washington Aqueduct Bridge is the subject of most of the images. The Washington Channel Bridge, the Potomac Highway Bridge, and the 11th Street Bridge are also included among the images. Additionally, there is a letterpress book, an employee time book, a...

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

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.

Photographs and photograph albums documenting engineering projects with which Robert Weide was involved. They include the Potomac Electric Power Company plant in Washington, D.C.; the Bureau of Engraving and Printing building in Washington, D.C.;. a hydroelectric plant on the James River for Bedford City, Virginia; a power plant in Salem, Ohio; a p...

Photographs documenting civil and mechanical engineering activities, equipment, facilities, and projects. Some of the subjects are boilers, engines, turbines, lighthouses, aqueducts, bridges, factories, roads, hydroelectric stations, kilns and mills. Few of the images are identified.

Manuscripts, correspondence, business records, newspaper clippings and scrapbooks documenting the career of Henry Grattan Tyrrell, an early-twentieth-century civil engineer and bridge builder who was also a prolific self-published author of hundreds of journal articles and several books. Subjects include aesthetic bridge design, history of bridges, design of movable bridges, and the economical design of factories, shops, and mill buildings.

The Oliver Ingraham Lay, Charles Downing Lay, and Lay Family Papers measure 10.54 linear feet and date from 1789 through 2000, with the bulk of the material dating from circa 1870-1996. The collection presents an overview of the personal lives and careers of painter, Oliver Ingraham Lay and his son, landscape architect, Charles Downing Lay. In addition, there are the papers of Lay family members and friends, including those of the Marian Wait Lay family (wife of Oliver Ingraham Lay) and of the Laura Gill Lay family (wife of Charles Downing Lay). Also found are the papers of the landscape and nature painter Fidelia Bridges. The collection consists of biographical material, correspondence, diaries, writings and notes, scrapbooks, family business records, exhibition files, printed material, as well as original artwork, sketches, a sketchbook, landscape designs, and photographs.

11 8" x 10" and 10 4" x 5" glass photonegatives, some marked "1885", one marked "1865" and "Libby Prison"), but most seem from ca. 1885; silver gelatin except two silver collodion plates, one of which bears the "1865." The large plates were stored in a nineteenth-century wooden, grooved plate box (now stored separately). Images depict buildings and...