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A number of studies which were published in the American Journal of Physical Anthropology form the basis for this book. They were made into an integrated whole by the addition of further studies. The reader is escorted through a study of the sulci of subhuman primates, from the lemur to the chimpanzee (118 pages) to the sulcal pattern in man. A chapter on encephalometry describing the author's method compares the brain of apes with that of man. The development of the human sulcal pattern is followed by a description of the brain of newborn infants and children. To a detailed study of the brains of white persons and Negroes (80 pages) which had previously appeared in the American Journal of Physical Anthropology there is appended a general discussion of brain and race: "Frequency differences in the fissural pattern as well as in other morphological features occur in the brain of
External Morphology of the Primate Brain. JAMA. 1950;143(8):775-776. doi:10.1001/jama.1950.02910430067037