To our knowledge, no systematic statistical analysis has been made of the blood of sufficiently large numbers of healthy persons for detection of a racial difference expressed in hemoglobin values. Many investigators have studied the hemoglobin content of the human blood, and in the main statistics submitted have tended toward the establishment of standards for given ages or toward showing the effect of certain nutritive elements on the hemoglobin. In some studies of growth conducted in the Research Laboratory of the Children's Fund of Michigan, where monthy observations on the blood were made as part of the detailed examination given each of 364 healthy infants, there was a sufficiently large number of Negro infants to furnish some valuable hemoglobin comparisons hitherto unreported.
Some of the more elaborate investigations presented in the literature, such as Magnusson's study of the hemoglobin level of premature infants1 and Mackay's comprehensive study of nutritional
MUNDAY B, SHEPHERD ML, EMERSON L, HAMIL BM, POOLE MW, MACY IG, RAIFORD TE. HEMOGLOBIN DIFFERENCES IN HEALTHY WHITE AND NEGRO INFANTS. Am J Dis Child. 1938;55(4):776-783. doi:10.1001/archpedi.1938.01980100112007