. The biology of death; being a series of lectures delivered at the Lowell Institute in Boston in December 1920. Death (Biology). 246 BIOLOGY OF DEATH The area covered is the United States birth registration area. We see that with the very low death-birth ratio of 56 in 1915, there was no si^uficant change till the influenza year 1918, when the ratio rose to 73 per cent. eso. I9IS 1919 I9» 1915 016 4917 ISia yCAR ^'fi,o^;~S','J,'?°^,?!'^ change in percentage which deaths were of births in each of the \a^}^}l^P^i ^T Vj«°°j^' , , ): 1915 to 1919 for the United States (—--); and 1912 to 1920 for
. The biology of death; being a series of lectures delivered at the Lowell Institute in Boston in December 1920. Death (Biology). 246 BIOLOGY OF DEATH The area covered is the United States birth registration area. We see that with the very low death-birth ratio of 56 in 1915, there was no si^uficant change till the influenza year 1918, when the ratio rose to 73 per cent. eso. I9IS 1919 I9» 1915 016 4917 ISia yCAR ^'fi,o^;~S','J,'?°^,?!'^ change in percentage which deaths were of births in each of the \a^}^}l^P^i ^T Vj«°°j^' , , ): 1915 to 1919 for the United States (—--); and 1912 to 1920 for England and Wales( ). But in 1919, it promptly dropped back to the normal value of , almost identical with the 1917 figure of In England and Wales, the provisional figure indi- cates that 1920 will show a lower value for the vital index than that country has had for many years. So we see that neither a highly destructive war, nor the most destructive epidemic since the Middle Ages, serves more than to cause a momentary hesitation in the steady onward march of population 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
