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new to the field of perinatal drug dependence by including transcriptions of the discussions that followed each paper's presentation. The discussions bring to light the marked disagreements between different groups of investigators over such major issues as heroin's effect on chromosomal aberrations, the drugs to be used for treating drug dependent neonates and the incidence of physical abuse of children by drug dependent parents. The inclusion of the discussions does not, however, make up for the fact that a number of the papers suffer from a lack of critical editing. It is disturbing that at the time of the conference in 1974 there are authors who do not distinguish between premature and small-for-gestational age infants. Parts of this volume may be of interest to those workers concerned with fetal and neonatal pharmacology and with neonatal drug dependence. The publication of the proceedings of this conference in book form will make the papers more widely accessible than in their original journal form. This volume is not, however, a definitive treatise on the subject of neonatal drug dependence. PETER T. ROTHSTEIN Departments of Anesthesiology and Pediatrics Yale University School of Medicine