in Pathological Anatomy," published in 1882. Since 1868, when he became a lecturer on pathological anatomy in the College of Physicians and Surgeons, Delafield had been a member of the Faculty of Columbia University. In 1875, he was appointed adjunct professor of medicine under Professor Alonzo Clark, and upon the latter's retirement in 1882 was elected his successor, as professor of pathology and the practice of medicine, being made professor emeritus in 1901. For a number of years since 1874, he was attached to the staff of Bellevue Hospital, at first as a member of the house staff, later as attending physician, and finally as consulting physician. He had served also as pathologist and attending physician to Roosevelt Hospital and as surgeon to the New York Eye and Ear Infirmary. In 1890, he was honored with the degree of LL.D. from Yale, and, in 1904, Columbia conferred a similar degree upon him. He held membership in the New York County Medical Society, the New York Academy of Medicine, the Pathological Society, and the Association of American Physicians, becoming the first president of the latter organization in 1886. The Delafield Commission Francis Delafield was the nephew of Major Richard Delafield. In 1855, Secretary of War Jefferson Davis dispatched Maj. Richard Delafield, Maj. Alfred Mordecai, and Capt. George B. McClellan to the battlefields of Crimea to observe the European military in action. American military commanders had studied European armies before, but the Delafield Commission was the most ambitious military observation mission up to that time and the first to observe an ongoing war. Major Delafield procured illustrations of Crimean weaponry that informed designs for the United States Civil War. Attended William McKinley Francis Delafield was the primary physician who was consulted following the shooting of United States President William McKinley in September 1901. While Francis argued to use the X-Ray machine to photograph McKinley's organs and assess the damage, he met opposition from others unwilling to use the new technology. Some attribute this inaction to contributing to McKinley's ultimate demise. Legacy In 1948, in recognition for his career in medicine, the Francis Delafield Hospital opened as a cancer research center for Columbia-Presbyterian Medical Center. The six-story building was located at 163rd Street and Fort Washington Avenue in Manhattan. Its 2,000,000 volt roentgen ray installation was the second ever in New York City. Terms Delafield's hematoxylin — a strong solution of hematoxylin crystals,