. The biology of death; being a series of lectures delivered at the Lowell Institute in Boston in December 1920. Death (Biology); Death. 232 BIOLOGY OF DEATH r= NON - CONTROLLED CAUSES OF DEATH }00 o o o cr o 10. I I I I I I I I I I I I I I I I I I I 190001 02 03 O4 05 O6 07 03 O9 10 II 12. 13 14- 15 16 17 13 YEAR FIG. 53.—Trend of death rates from four causes of death upon which no direct attempt at control has been made. outstanding fact is that their rates of mortality have de- clined and are declining just as did those in the control- lable group shown in Figure 52. It is of no m


. The biology of death; being a series of lectures delivered at the Lowell Institute in Boston in December 1920. Death (Biology); Death. 232 BIOLOGY OF DEATH r= NON - CONTROLLED CAUSES OF DEATH }00 o o o cr o 10. I I I I I I I I I I I I I I I I I I I 190001 02 03 O4 05 O6 07 03 O9 10 II 12. 13 14- 15 16 17 13 YEAR FIG. 53.—Trend of death rates from four causes of death upon which no direct attempt at control has been made. outstanding fact is that their rates of mortality have de- clined and are declining just as did those in the control- lable group shown in Figure 52. It is of no moment. 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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