Harrison’s Principles of Internal Medicine has a long and dis- tinguished tradition in the field of hematology. Maxwell Wintrobe, whose work actually established hematology as a distinct subspecialty of medicine, was a founding editor of the book and participated in the first seven edi- tions, taking over for Tinsley Harrison as editor-in-chief on the sixth and seventh editions. Wintrobe, born in 1901, began his study of blood in earnest in 1927 as an assistant in medicine at Tulane University in New continued his studies at Johns Hopkins from 1930 to 1943 and moved to the University of Utah in 1943, where he remained until his death in.