Dan Dee Pretzel and Potato Chip Company was an American snack food manufacturer based in Cleveland, Ohio. This collection consists of nine short, silent film reels depicting select manufacturing and packaging processes at the company's factory and warehouse.

Diesel Equipment Corporation was a designer and manufacturer of fuel injection equipment during the late 1930s and 1940s. This item is an album of photographs showing the company's research and manufacturing activities at the Ravenswood Plant.

Pierre Samuel du Pont de Nemours (1739-1817) was a French political economist, writer, publisher, and public administrator. He was an advocate for a national educational system and promoted Franco-American trade relations. The collection consists of Pierre Samuel du Pont de Nemours correspondence and writings in addition to correspondence of his second wife, Françoise (Robin) Poivre.

The Wolf Envelope Company was an envelope, stationery, and novelties manufacturer in Cleveland, Ohio, during the twentieth century. Founded in 1899 by Louis Littman (1855-1937), the company was greatly expanded by Harry Fleishman Affelder (1881-1963), who joined in 1913 and eventually became President. This collection consists of one silent 16mm film, commissioned by Affelder, primarily documenting the daily operations at the Wolf Envelope Company's facilities in 1935. Also included are a few short clips showing the manufacturing processes employed by other envelope industry companies, including the Berkowitz Envelope Company in Kansas City, Missouri, a paper mill in Berlin, New Hampshire, and John Dickison & Company in Washington, Tyne and Wear, England.