I am deeply indebted to Dr. Mark M. Ravitch, my mentor, for his encour agement and prodding (often needed). Without his guidance and patience these pages might not have been written. I am also indebted to his office staff, especially Mrs. Mary Beth Madalinsky and Mrs. Ruth Jacobson, for performing the yeoman's task of typing my manuscript with all of its revisions and additions. I wish to thank Mr. Leon Schlossberg for illus- trations and pen sketches that did not appear in original publications and Dr. Ransom Buchholz for furnishing many pictures of the Vanderbilt years. Dr. Joseph W. Beard's teaching and indoctrination stimulated my interest and greatly influenced me in remaining in the field of medical research.
I wish to thank my niece, Valeria T. Spann, for critical reading and my daughter, Theodosia P. Rasberry, for the typing of some of the prelimi- nary manuscript.
Last but not least, my expression of appreciation and my apologies go to my wife, Clara, often neglected, for bearing with me while I spent less time with her during the preparation of this manuscript than I had during my years of regular employment.