Not too many years ago a standard textbook of anatomy described the sacroiliac joint as immovable. The articulations of the cranium have long been subject to the same misapprehension, their description having come from the cadaver rather than the living subject. It remained for Dr. Sutherland to prove by years of experimental research on himself and his patients, that there is definite, if slight, motion between the cranial bones.

 Although disparaged even by his own profession he clung to his theories and showed them to be right by an overwhelming weight of clinical evidence. Belatedly rallying to his support, a group of his colleagues felt impelled to correlate all the information available on the subject in textbook form.