Studies in Heterogenesis

went over a large portion of the ground on which Dr. Bastian had taken up his stand, and refuted many of the fallacies which had misled the public.' Pasteur was so anxious to drive Dr. Bastian to the wall for the following reason, which we give in his own words, written to Dr. Bastian in 1877: 'Do you lenow why I desire so much to fight and conquer you ? It is because you are one of the principal adepts of a medical doctrine which I believe to be fatal to progress in the art of healing?the doctrine of the spontaneity of all diseases.' " It has not yet been forgotten how keenly this conflict was fought, and we were under the impression that Bastian had long since allowed that Pasteur had been the victor. It comes to us, therefore, as a surprise that Dr. Bastian still clings to his convictions with a doggedness and pertinacity worthy of all commendation in what he believes to be a good cause. He still adheres to the per saltum theory of the origin of life, and he still believes in the spontaneity of living organisms. He declines to admit that life is to be defined as a power derived only from pre-existing living beings, and that all organisms even the most lowly bacteria?breed true. His studies have