Francis “Frank” Pierre Gentieu (1876-1950) was a ballistic engineer at E.I. du Pont de Nemours & Company, a chemical company more commonly referred to as the DuPont company. Gentieu worked at DuPont's Carney's Point Plant in New Jersey from 1901 to 1941. This small collection contains an account by Gentieu entitled "The First Fifty Years at Carney's Point" (1891-1941); correspondence with du Pont family members; a list of his father Pierre Gentieu's photographs of the DuPont Company and Brandywine area; and a recollection written by Samuel Brown of a conversation with Sophie M. du Pont (1810-1888) related to the Brandywine Manufacturers Sunday School.

James Henry Yeager (1911-1986) was the industrial photographer for the Bethlehem Steel Corporation for thirty years, between 1946 and 1976. The first half of this collection contains photographs taken by James H. Yeager during his tenure at Bethlehem Steel as industrial photographer. The second half the this collection consists of photos and slides taken by Yeager while traveling in Pennsylvania, New York, and New England, and to a lesser degree Washington, DC and the southern United States.

James "Jim" Joseph Dallas, Sr. (1932-2019) was a photographer employed by the DuPont Company, a chemical company. He worked at DuPont for ten years before opening his own industrial and commercial photography business, Dallas Studios based in Wilmington, Delaware. In 1968, Dallas also worked as a freelance commercial and industrial photographer. Companies such as the Speakman Company, Strescon Industries, Cytometrics Incorporated, and ICI America Incorporated are just a few of the industries he worked for. This collection consists of images from Jim Dallas’ assignments primarily for the DuPont Company. The collection of negatives and photographic prints are arranged into five different sereis: I. Sites, II. Products, III. Advertisements and publications, IV. Events and meetings, and V. People.

Lepley & Joswick Photographers was a commercial photographic studio in Chicago, Illinois, between 1946 and 1952. The firm was a partnership between Alden D. Lepley (1911-2003) and Gerald "Jerry" J. Joswick (1923-1990). In 1946, Lepley and Joswick opened a photography studio at 5121 W. Devon Ave. in Chicago. Their clients were mainly industrial ones. Both partners continued to pursue side projects and give lectures separately. This small collection of photographs features a range of commercial images depicting different areas of industry in Chicago between 1940 and 1952. It includes food factory assembly line workers, canned and boxed food products, home appliances and electronics, and interior home designs.

The Midvale Steel Company manufactured steel parts for the railroad industry and the armaments industry. The company was known for casting, forging, and machining high-quality steels, including alloy steels. This album contains photographs showing exteriors and interiors of Midvale Steel facilities in the Nicetown area of Germantown.