. The biology of death; being a series of lectures delivered at the Lowell Institute in Boston in December 1920. Death (Biology). 178 BIOLOGY OF DEATH degrading environmental conditions, or economic want can liave influenced the results. These data were com- et: 1^ § 50 4S 40 35 30 Z5 20 15 10. MOTHER /WO CHILDREN FATHER AND CHILDREN 16 26 36 46 56 66 76 AGE AT DEATH OF PARENTS 86 and c Tia. 44.—Diagram showing the influence of age at death of parents upon the percentage of offspring dying under 5 years. (After Floetz). pUed by the well-known German eugenist, Professor Ploetz of Munich, The li
. The biology of death; being a series of lectures delivered at the Lowell Institute in Boston in December 1920. Death (Biology). 178 BIOLOGY OF DEATH degrading environmental conditions, or economic want can liave influenced the results. These data were com- et: 1^ § 50 4S 40 35 30 Z5 20 15 10. MOTHER /WO CHILDREN FATHER AND CHILDREN 16 26 36 46 56 66 76 AGE AT DEATH OF PARENTS 86 and c Tia. 44.—Diagram showing the influence of age at death of parents upon the percentage of offspring dying under 5 years. (After Floetz). pUed by the well-known German eugenist, Professor Ploetz of Munich, The lines show the falling per-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Pearl, Raymond, 1879-1940. Philadelphia, London, J. B. Lippincott Company
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