This excellent monograph is divided into two parts. In Part 1, the author writes first of the care of premature infants; second, of the mortality and detailed treatment, with the special causes of death, and third, morbidity, with details covering dyspepsia, icterus, birth trauma, syphilis, spasmophilia, anemia, grip and secondary intestinal conditions. In part 2 he deals specifically with rickets, as seen in the premature infant. He first writes of the analogy and the differences in the course of rickets between the full term and the premature infant. The next chapters cover the relationship between the frequency of rickets and the following observations: the birth weight and season; the early diagnosis as related to clinical and roentgenologic data; the later diagnosis made from roentgenologic data; serum and urinalyses; histologic examination—this chapter is well illustrated by photomicrographs, and covers a study of thirty-three premature and twenty-seven full term infants