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Dorothy Burlingham reports a study of three sets of identical twins who were observed at the Hampstead Nurseries during the years from 1940 to 1945. Incorporated in the book are articles by the same author which have already appeared in The Psychoanalytic Study of the Child: Fantasy of Having a Twin (Volume I); Twins: Environmental Influences on Development (Volume II); The Relation of Twins to Each Other (Volume III-IV).
No other author, to the reviewer's knowledge, has previously studied twins in this manner. Most papers about twins regard them more as experimental animals in the laboratory than as human beings. Burlingham's emphasis is on the interrelationship between the twins and other persons in their environment. She attempts to 'understand the environmental and innate conditions which account for the differences between their development and that of