Abstract
I would be less than truthful were I to deny that I approached this assignment with anything but considerable trepidation. For one, this being the first Harry F. Dowling Lecture means that it should set the tone for those which follow. That Harry Dowling is here makes the occasion truly enjoyable but unavoidably adds to the usual anxieties of the student who wishes to perform well in the presence of his teacher. In our case, this relationship covers a span of almost 35 years. Should I succumb to the temptation to "tell it like it was" by substituting reminiscence for fact, then perhaps you will be charitable and will seek and find some purpose in such deviations. I first met Harry Dowling in 1936. At that time, I was a medical student at the George Washington University School of Medicine, working in John Hanks's laboratory in the department of bacteriology.