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).
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.
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.
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.
18th, 19th, and 20th century material deposited with the Medical and Chirurgical Faculty of the State of Maryland, chiefly relating to the practice of medicine in the state. Includes correspondence, papers, certificates, diplomas, patents, maps, notebooks, clippings, prescriptions, pamphlets, photocopies of documents, scrapbooks, photographs, and p...
Business correspondence of homeopathic physicians Henry Barden and his son, William Wallace Barden, of Penn Yan, New York and Barden Family correspondence.
The Victor D. Spark papers measure 22 linear feet and date from circa 1830 to 1983, with the bulk of the material from 1930 to 1970. The papers document Spark's career as a New York City art dealer and appraiser who was most active from World War II through the 1970s, focusing on Old Masters paintings and 19th and early 20th century American art. Found within the papers are biographical materials, artist files, client files, financial records, legal records, printed material, and photographs.
The collection documents inventor and dentist Charles H. Land and consists of correspondence, financial records, patent records, articles, printed material, writings, sermons and photographs.