. The biology of death; being a series of lectures delivered at the Lowell Institute in Boston in December 1920. Death (Biology); Death. 178 BIOLOGY OF DEATH degrading environmental conditions, or economic want can have influenced the results. These data were com- 30 £ >• 20 15 10. MOTHER AND CHILDREN FATHER AND CHILDREN 16 36 56 66 \ \ \ \ 66 and over AGE. AT DEATH OF PARENTS FIG. 44.—Diagram showing the influence of age at death of parents upon the percentage of offspring dying under 5 years. (After Ploetz). piled by the well-known German eugenist, Professor Ploetz of Munich. The lines sh
. The biology of death; being a series of lectures delivered at the Lowell Institute in Boston in December 1920. Death (Biology); Death. 178 BIOLOGY OF DEATH degrading environmental conditions, or economic want can have influenced the results. These data were com- 30 £ >• 20 15 10. MOTHER AND CHILDREN FATHER AND CHILDREN 16 36 56 66 \ \ \ \ 66 and over AGE. AT DEATH OF PARENTS FIG. 44.—Diagram showing the influence of age at death of parents upon the percentage of offspring dying under 5 years. (After Ploetz). piled 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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