The authors of this work have charted the behavior of the infant with some 3,000 photographs. Thus they indicate his various postures, his use of his senses, his relationships to his environment, and the gradual growth of his compliance with social custom and manner. For the purpose a photographic dome was prepared especially equipped with the necessary materials. It thus becomes possible for physicians, psychologists, biologists and others to study in the minutest detail the development of the infant physically and mentally.
The second volume concerns the natural day of an infant under conditions in the home, giving in the minutest detail the steps involved in spoon feeding and breast feeding, also the use of the bottle and the cup, the bath, the baby's play, and its progress in walking, growth and in other ways. The interested professions will find many uses for this material.