 Hazen clearly indicate that where one death from typhoid fever has been avoided by the use of a better water, a certain number of deaths, probably two or three, from other causes, have been avoided.  Journal of the Franklin Institute - Էջ 48Franklin Institute (Philadelphia, Pa.) - 1915Ամբողջությամբ դիտվող - Այս գրքի մասին
 | Joseph Wilton Ellms - 1917 - 524 էջ
...Engineering Congress held in St. Louis, gave a quantitative expression for the phenomenon by stating that: "Where one death from typhoid fever has been...two or three, from other causes have been avoided." Sedgwick and MacNutt have called this expression "Hazen.s theorem," and have concluded from the studies... | |
 | Pennsylvania. Department of Health - 1917 - 752 էջ
...Eradication of typhoid has a far-reaching public health significance. Hazen's theorem, developed in 1904, was that "where one death from typhoid fever has been avoided by the use of pure water a certain number of deaths, probably two or three, from oiher causes have also been avoided."... | |
 | George Chandler Whipple - 1919 - 546 էջ
...1904 Hazen studied these and other records and stated that " where one death from typhoid fever had been avoided by the use of better water, a certain...two or three, from other causes have been avoided." In 1910 Sedgwick and MacNutt1 published an elaborate study in which Hazen's statement was dignified... | |
 | George Chandler Whipple - 1919 - 548 էջ
...1904 Hazen studied these and other records and stated that " where one death from typhoid fever had been avoided by the use of better water, a certain...two or three, from other causes have been avoided." In 1910 Sedgwick and MacNutt1 published an elaborate study in which Hazen's statement was dignified... | |
 | Fred Wilbur Tanner - 1919 - 634 էջ
...somewhat the same fact that " where one death from typhoid fever has been avoided by the use of a pure water, a certain number of deaths, probably two or three, from other causes have been avoided." This has become known as the " Hazen Theorem." These statements have not been entirely borne out by a more... | |
 | Fred Wilbur Tanner - 1919 - 634 էջ
...tuberculosis was reported for an improvement in the water supply. Hazen (1910) reported somewhat the same fact that " where one death from typhoid fever has been avoided by the use of a pure water, a certain number of deaths, probably two or three, from other causes have been avoided."... | |
 | Joseph Eames Greaves - 1922 - 450 էջ
...for the comparative effect of purified water upon the typhoid fever and total mortality as follows: "Where one death from typhoid fever has been avoided by the use of a better water, a certain number of deaths, probably two or three, from other causes have been avoided."... | |
 | Victor Clarence Vaughan, Henry Frieze Vaughan, George Truman Palmer - 1923 - 928 էջ
...Hazen concluded from a study of the work of Mills and Reincke and .from later observations of his own that "where one death from typhoid fever has been...two or three, from other causes have been avoided." Various reasons have been advanced to explain this result. While it is not difficult to understand... | |
 | George Chandler Whipple - 1923 - 618 էջ
...1904 Hazen studied these and other records and stated that " where one death from typhoid fever had been avoided : by the use of better water, a certain number of deaths, I probably two or three, from other causes have been avoided." In 1910 Sedgwick and MacNutt1 published... | |
 | 1923 - 252 էջ
...that there is also a decline in other diseases not necessarily water-borne. In HAZEN'S own words : ' where one death from typhoid fever has been avoided by the use of a better water, a certain number of deaths, probably two or three, from other causes has been avoided.'... | |
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