Memorial Statement for Professor Charles Ernest Hayden, D.V.M. (1881-1948) who was Instructor (1910-1914), Assistant Professor (1914-1929), and Professor (1929) of Physiology, and also served as Acting Department Head on several occasions at the New York State Veterinary College. In addition to being held in the highest esteem for his teaching and subject knowledge, "Dr. Hayden's research work on the normal constituents of the blood and urine of animals and on the metabolic disorders of animals made him an internationally recognized authority in these fields. He was one of the first veterinarians in this country to apply the modern methods of blood analysis to the blood of animals in health and disease." The memorial statements contained herein were prepared by the Office of the Dean of the University Faculty of Cornell University to honor its faculty for their service to the university.