i am not sure any knew of samuel weiss. the type of research he was doing that was ongoing in the '60s. they did not know anything about. it had minimal impact. virtually none. >> hi. >> hello. >> to dr. mitchell's quote, wasn't there a statue of samuel gross who wrote the field manual created in washington? and wasn't he the fellow who -- who at the philadelphia centennial in 1876, didn't he tell lister that -- that there was, no value to antisepsis and wasn't his statue taken out of washington and put back at his alma mater thomas jefferson? >> now i will make a confession. i do not know this gentleman. he is not my father. this is not a staged question. that is like my favorite topic. samuel gross is my favorite individual in american medicine. the answer is very simple. there was not a statue of him. don't know if it is in washington. his statue is by jefferson. on the courtyard as you walk into the medical school. yes he did tell lister that no american wanted to listen to what he had to say. that was -- lister call ov