This presents a large series of reproductions of roentgenograms of normal and pathologic bones and joints; also a number of traumatic lesions of the skeletal structures and some congenital variations. The various lesions are presented in clear detail, and it is evident that the author has used originals of the highest technical quality. The several divisions of the subject are presented in such a manner as to provide a reference for comparative study, and a large variety of lesions are shown. The author has selected typical examples, and appears to have avoided borderline cases over which there might be a difference of opinion, even among the more experienced in roentgen-ray interpretation. The explanations that accompany each case are, in general, very satisfactory, and the roentgen-ray student will find much instructive material in this work.