published in 1938 and 1939 and achieved wide acceptance and use.
As time went on Corner received a number of invitations to take over prestigious chairs in other schools as they fell vacant. After due consideration he refused them all. His decision was influenced both by his pride in the Rochester Medical School that he had helped build and his satisfaction with its continuing standards, especially those of his own Anatomy Department and his course in histology, and especially by his desire not to interrupt in any way the flow of his research work. The whole pleasant pattern of life in Rochester was another not inconsequential consideration. But, in the fall of 1939, the irresistible call came. Vannevar Bush, president of the Carnegie Institution of Washington, offered him the directorship of the Department of Embryology in Baltimore. It was an exceedingly difficult decision to leave Rochester, but conclusive arguments were the prospect of a wider field of activity and influence and the thought of directing the laboratory that had been founded by Franklin Mall, his own first mentor in research. Following Mall, George L. Streeter had made the department into the world's foremost center for embryologic research. It had become a veritable mecca to a succession of visitors from this country of embryos to participate for longer or shorter periods in the research projects under way.
Corner accepted this call in 1940 and returned to his native city, where he found a pleasant house and was surrounded by kinfolk and good friends. A pleasing welcome home was the invitation to be a trustee of the Samuel Ready School of which both his grandfather and father had been president. This too he accepted, becoming president him-