For a number of years one of us (G.1) has been studying the chemical composition of the stools of infants with special reference to the influence of various diets, particularly the carbohydrates. The infants under observation were kept in a special nursery under the supervision of a special nurse, provided by the hospital administration and training school, thus minimizing the possibility of accidental intercurrent infections. They entered the hospital at the age of from 2 to 3 weeks and remained until about 6 months of age. The carefully controlled factors presented an unusual opportunity for extensive study of the bacteriology of the stools of these infants as well as an attempt to correlate the types of fecal bacteria with the chemical composition of the stool.
REVIEW OF THE LITERATURE
Significance of Gastro-Intestinal Bacteria.—From 1719, when Antony von Leeuwenhoek used his newly devised microscope to discover mysterious particles in