This fourth volume of the French system of pediatrics completes the discussion on diseases of the intestinal tract and takes up diseases of the genitourinary tract, intoxications, diseases of the bones and of the skin and eyes and psychiatry. As in the treatment of subjects in the other volumes, this work is detailed and well illustrated. Again the work of Péhu on syphilis of the bone stands out; the illustrations are beautiful and well chosen. The portion on the diseases of the skin by Sézary and his collaborators is beautifully done and is illustrated with excellent photographs. One colored plate in this section is well chosen and gives an excellent picture of infantile eczema. The illustrations in the chapter on mental deficiency by Heuyer are exceptionally good, as would be expected from an author whose attainments in this field are so great.