 ... reduced prevalence of typhoid fever and other recognized typical water-borne diseases. A study of the vital statistics of numerous places where the quality of the public water supply has suddenly been changed from bad to excellent, as for instance,...  Studies in Water Supply - Page 126by Alexander Cruikshank Houston - 1913 - 203 pagesFull view - About this book
 | 1911 - 128 pages
...accounted for by the reduced prevalence of typhoid fever and other recognized typical water-borne diseases. A study of the vital statistics of numerous places...known as the Hazen Theorem because Mr. Allen Hazen, in 1904-'05, was the first to announce, in definite terms, this interesting and most encouraging phenomenon.... | |
 | Denis Crispin Twitchett, John King Fairbank - China - 1912 - 658 pages
...accounted for by reduced prevalence of typhoid fever and other recognized typical water-borne diseases. A study of the vital statistics of numerous places...as the Hazen Theorem, because Mr. Allen Hazen, in 1904-05 was the first to announce, in definite terms, this interesting and most encouraging phenomenon.... | |
 | Municipal government - 1917 - 886 pages
...accounted for by the reduced prevalence of typhoid fever and other recognized typical water-borne diseases. A study of the vital statistics of numerous places...known as the Hazen Theorem because Mr. Allen Hazen, in 1904-'05, was the first to announce, in definite terms, this interesting and most encouraging phe220... | |
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