Finding Aids

The Centennial International Exhibition of 1876 celebrated the one hundreth anniversary of American Independence. Held in Fairmount Park in Philadelphia, it was the first major U.S. world's fair. This collection contains Centennial Exhibition photographs, albums, scrapbooks, and ephemera

E.I. du Pont de Nemours & Company is a chemical company more commonly referred to as the DuPont company, established in 1802. DuPont's Chestnut Run Laboratories was opened in 1954 near Wilmington, Delaware. This collection consists of two albums documenting the history of the Chestnut Run facility between 1954 and 1961. One album contains primarily photographs taken of the facilities exteriors between 1955 and 1958. The second album contains mostly newspaper clippings between 1954 and 1961.

Levi C. Stang (1890-1962) was an electrical engineer and general manager of several electric companies throughout the Midwest. His scrapbook chronicles his career and employment as an electrical engineer through selected letters and correspondence, newspaper and other clippings, blueprints, and photographs.

Mark C. Walker & Son Co. was a general contractor firm in the early to mid-twentieth century. The company was founded as Callahan-Walker Construction Company in Omaha, Nebraska, by Mark Connell Walker (1889-1966) and his father-in-law, William F. Callahan (1856-1930), a railroad contractor. Upon Callahan's death, Walker took on his son, Mark Callahan Walker (1911-1999), as a partner. This album, compiled by Walker Jr., documents construction projects during World War II, as well as the post-war western United States. It highlights the impact of public works in the twentieth century. The album contains photographs, text, and newspaper clippings detailing several key construction projects: the Gary Armor Plate Steel Mill in 1942, the Harlan County Dam between 1946 and 1947, and the Orange County Sanitation Plant in 1953. The album also contains photographs and trade catalogs from the company's Polair Mobile Refrigerator Division, which designed and built refrigerated truck trailers for the U.S. Army.