This little book contains a series of lectures which were given at the University of Copenhagen in the autumn of 1934 for medical students and physicians. No sharp distinction of subjects separates the seven chapters contained in the book. The translation from the Danish leaves much to be desired, since the sentences are frequently long and involved. All forms of pain, the author states, may be most conveniently divided into three main groups: (1) direct pains, localized to the site of irritation; (2) indirect pains localized at some distance from the site of irritation, and (3) combined pains consisting simultaneously of direct and indirect pains. These lectures are concluded with the information that a larger later work is intended, which will divide all pains occurring in man into eight groups.