The Mark Clyde Phillips Collection is comprised of materials generated and collected by Phillips, an Oregon Agricultural College (OAC) Professor of Mechanical Engineering and Superintendent of Heating. Included are materials documenting Phillips' education and career at OAC (1897-1947) including correspondence, course materials, certificates and diplomas, a patent, and professional literature. The collection also contains Phillips family genealogical records and mementos including an autograph book, a manuscript account of the life of James T. Phillips (Mark Clyde's father), and several deeds and patents. Also present are materials documenting the Crawford family (Mark Clyde's second wife), including a genealogical record, an autograph book and photo album, and a scrapbook. Photographic prints, real photo postcards, and a tintype of Mark Clyde Phillips and other members of the Phillips and Crawford families are also present.