440 First European Journey 



tumor shows very considerable points of similarity with the animal 

 malignant tumors, especially with the carcinoma." ^^ And Dr. 

 Jensen enjoyed a world wide prestige as a student of animal 

 cancer ! 



Since 1906 Dr. MacCarty had been with the Mayo Clinic as a 

 specialist in surgical pathology and biopathology. Graduating in 

 science in 1900 from the University of Kentucky, he had obtained 

 his degree of doctor of medicine at Johns Hopkins in 1904 and 

 then gone to the Koenigin Hospital, Berlin, Germany, for further 

 study specializing in surgical pathology. Returning to the United 

 States, he had planned, together with teaching pathology at Wash- 

 ington University, to practice medicine in St. Louis. But Dr. Welch 

 recommended him for appointment as a full time pathologist on 

 Director Louis B. Wilson's laboratory staff, with facilities at St. 

 Mary's Hospital, Rochester, Minnesota, and under the celebrated 

 surgeons and brothers. Dr. William James Mayo and Dr. Charles 

 Horace Mayo.''^ For a year while at the University of Kentucky, 

 Dr. MacCarty had taught botany and was, therefore, admirably 

 fitted to collaborate informally with Smith in the latter's new work. 

 Dr. Gaylord for several years had made plain his certain interest 

 in Smith's analogue of crown gall and human cancer. April 19, 

 1911, Dr. Roswell Park, reading Smith's monograph, "Crown- 

 Gall of Plants: Its Cause and Remedy," sent him an immediate 

 card of thanks and said, "As I have glanced over its pages it 

 becomes more and more evident to me that the work on Com- 

 parative Pathology needs to be written and needs you for a 

 collaborator." 



At McGill University, Montreal, Canada, where Dr. William 

 Osier had taught before going to the University of Pennsylvania 

 and Johns Hopkins, the great English born pathologist. Dr. John 

 George Adami, now professor of pathology of the Department 

 of Pathology and Bacteriology of McGill, on March 8 of the same 

 year had written to Smith: 



I have read with intense interest your monograph on Crown-Gall of 

 Plants, and congratulate you most cordially upon it, and upon the results 



'^ See a translation of a paper by Jensen in Smith's address, Twentieth century 

 advances in cancer research, Jour. RcuJ/ology 4(9): 299, Sept. 1923. 



*■* An interesting book on these two great men has been written by Helen Clape- 

 sattlc, The Doctors Mayo, Minneapolis, Univ. of Minn. Press, 1941. In this appears 

 many references to Dr. MacCarty and his work at the Mayo Clinic. 



