Papers document the life of Elmer Gates (1859-1923), an independent American inventor and psychologist. Gates developed ideas related to experimental psychology and inventions in fields such as metallurgy, electricity, microscopy, X-rays, and pedagogy. Papers include correspondence, photographs, patents, articles and clippings, writings, and estate documents.
The collection documents entrepreneur and inventor John Souther and his manufacturing companies Globe Works and American Steam Locomotive. Much of the collection consists of documentation and correspondence related to Globe Works' legal affairs.
This collection consists of material relating to Cecil P. Northrop's aviation career with the Pennsylvania Central Airlines and the Airline Wartime Training Institute (AWTI).
Business correspondence of homeopathic physicians Henry Barden and his son, William Wallace Barden, of Penn Yan, New York and Barden Family correspondence.
This collection consists of materials documenting the history of electron optics, especially electron microscopes. Included are engineering drawings of Marton's devices, designed in Belgium, Stanford and RCA in the 1930s and 1940s; notebooks concerning extensive investigations in electron microscopy; photographs and micrographs concerning developm...
The collection documents inventor and dentist Charles H. Land and consists of correspondence, financial records, patent records, articles, printed material, writings, sermons and photographs.
Collection documents the business activities of the Sandford Card Company and include the papers of Mary Elizabeth Sandford, founder of the company, and her immediate family.
These records include annual reports, 1901-1913, 1929-1930; monthly reports, 1956-1957; correspondence, 1880; financial reports and statistics, 1916-1922, 1936-1960; record book, 1868-1941; a minute book from Worthington's predecessor, Holly Manufacturing Company, 1859-1912; legal documents on consolidation, 1916-1930; company history by John F. Gr...
Records from Blumenthal Brothers Chocolate Company, manufacturers of chocolate and cocoa products, including well-known candies such as Snocaps, Raisinets, and Goobers. They were located in Philadelphia, Pennsylvania. The company was sold to Ward Foods Incorporated in 1969. This collection also includes material collected by and about the Blumenthal family and from M.L. Blumenthal, noted illustrator of the early 20th century.
These records document exhibitions organized by the Department. Also included are administrative files and general correspondence files of the office.