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George W. Kosmak, M.D.
JAMA. 1936;106(24):2089. doi:10.1001/jama.1936.02770240053025.
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To the Editor:—  In a paper on the training of medical students in obstetrics (The Journal, April 25, p. 1435) I inadvertently committed an error in comparing the incidence of cesarean section in American with foreign institutions. It was stated that the incidence at the Boston Lying-In Hospital was 1 to 12 and at the Jefferson Hospital in Philadelphia 1 to 6 during the period 1929-1930. Dr. Frederick C. Irving, visiting obstetrician to the Boston Lying-In Hospital, and Dr. P. Brooke Bland, attending obstetrician to the Jefferson Medical College Hospital of Philadelphia, have each protested the correctness of my statements. Dr. Irving informs me that the incidence of cesarean section at his institution was 1 in 32.7 in 1929 and 1 in 27.5 in 1930, while Dr. Bland states that during the period from 1925 to 1935 the percentage has been 1.6, or less than one in fifty deliveries. While


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