PREFACE.
This Lecture, delivered October 2nd, 1900, was published in The British Medical Journal of October 6th of the same year. As it so appeared, having been passed hurriedly through the press, it contained various inaccuracies, and I made arrangements for having it reprinted in separate form. I had finished correcting the proofs, when circumstances into which I need not enter led to delay, which has been since extended by several years of serious illness, so that I long abandoned all idea of the Lecture appearing again during my lifetime.
But it occurs to me that, though belated, it may still have interest for some of my professional brethren; and I have decided to issue it again as it was originally given.
LISTER
February, 1907.
