Letterpress copybooks of Nathan C. Ricker's correspondence with presidents, deans, librarians, faculty and students relating to admissions, transfer of credits, enrollment, graduate program, degree requirements, curriculum, class schedules, textbooks, annual reports, materials testing, engineering research, University building plans, supervising architect, attendance at professional meetings and occasions letters of recommendation, staff appointments, employment, purchase and classification of books, slides, equipment, supplies museum exhibits, publications and related topics.