The arrangement of the illustrations and the illustrations themselves are well done. The progress of destruction of tissues as well as regeneration is followed in an enlightening manner and the progress of the disease condition can be followed at a glance rather than by reading a long description of the condition. The description of the disease, which is given at the beginning of each chapter, is concise, accurate and instructive. The footnotes are well to the point. As a constructive criticism, a little more of the therapy used in each case should be introduced in the foot notes. This work will benefit any one who is devoting his time to diagnosis and treatment of disease by the use of the x-rays.