"All those who have at any time given clinical demonstrations on disease must have felt the desire to impress more firmly on their hearers the remembrance of what they have seen than is possible in an ordinary lecture. After many attempts to arrive at this in some other way, I have now tried to preserve, in a measure, the impressions of a term’s clinical work in the form of the lectures contained in the following pages. In my descriptions I have endeavoured, as far as possible, to follow the actual course of the lectures. Naturally, not only must this work give up all claim to the actual presentation of the patients, for which the student can only be compensated by personal experience in the hospital, but we must also forego the great help to teaching afforded by the assistant’s little awkwardnesses and blunders, which so often serve to point out to the teacher the right method of instruction. On the other hand, the material can in this way be worked up more concisely, more systematically, and more completely than is generally possible in the hospital.