Correspondence, O-Z, 1911-1948

This series is organized alphabetically by individual or company. McCullough's correspondents are generally companies selling chemical or photographic supplies, persons involved in chemistry or photography, and a few Oberlin College faculty members and former students. A majority of his correspondence is letters received, but some are carbon copies of letters sent. In addition, this series includes a few autographed letters by McCullough. Among his more significant correspondents, Harry N. Holmes and Frank F. Jewett were colleagues. Their letters debated the merits of allowing McCullough, who never earned his doctorate, to become a full professor. McCullough's correspondence with Oberlin College Presidents Henry C. King and Ernest H. Wilkins were mainly of an official nature.