. The biology of death; being a series of lectures delivered at the Lowell Institute in Boston in December 1920. Death (Biology). 237 NATURAL DEATH, PUBLIC HEALTH laissez-faire policy would be better, or that public health efforts have not been enormously valuable in connection with typhoid fever aad diphtheria. My purpose is quite other, being solely a desire to emphasize two things, viz: 1. That the trend of human mortality in time is an no so 80 70 DIPHTHLPIA £ §. \..- ' ^fOup LJ '^^ 99130001 Oi 03 04 05 06 07 OS 09 10 1/ le YEAH Fio. 56.—Like figure 55^ but for diphtheria and croup. extrao
. The biology of death; being a series of lectures delivered at the Lowell Institute in Boston in December 1920. Death (Biology). 237 NATURAL DEATH, PUBLIC HEALTH laissez-faire policy would be better, or that public health efforts have not been enormously valuable in connection with typhoid fever aad diphtheria. My purpose is quite other, being solely a desire to emphasize two things, viz: 1. That the trend of human mortality in time is an no so 80 70 DIPHTHLPIA £ §. \..- ' ^fOup LJ '^^ 99130001 Oi 03 04 05 06 07 OS 09 10 1/ le YEAH Fio. 56.—Like figure 55^ but for diphtheria and croup. extraordinarily complex biological phenomenon, in which many factors besides the best efforts of health officials are involved. 2. That for many causes of death a vast lot needs to be added to our kaowledge of etiology, in the broadest sense, before really efficient control can be hoped for. This knowledge can come only through scientific investi-. 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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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherphila, bookyear1922
