. A civic biology : presented in problems. Biology; Sanitation. *. _ V -;=*. .'• - -v. 2 !PM < s-*c* • 'f.'^SS^ -HU &$$'-, "f^--; ^.-^^^^^ ?^;^^^^;^^ en// "'wV.' .!»//. This figure shows how sswage from a cesspool (c) might get into the water supply: Im, layer of rock; w, wash water. in the intestine and are passed off from the body with the excreta from the food tube. If these germs get into the water supply of a town, an epidemic of typhoid will result. Among the recent epidemics caused by the use of water containing typhoid germs have been those in Butler, Pa., where 1364 p
. A civic biology : presented in problems. Biology; Sanitation. *. _ V -;=*. .'• - -v. 2 !PM < s-*c* • 'f.'^SS^ -HU &$$'-, "f^--; ^.-^^^^^ ?^;^^^^;^^ en// "'wV.' .!»//. This figure shows how sswage from a cesspool (c) might get into the water supply: Im, layer of rock; w, wash water. in the intestine and are passed off from the body with the excreta from the food tube. If these germs get into the water supply of a town, an epidemic of typhoid will result. Among the recent epidemics caused by the use of water containing typhoid germs have been those in Butler, Pa., where 1364 persons were made ill; Ithaca, N. Y., with 1350 cases; and Watertown, N. Y., where over 5000 cases occurred. Another source of infection is milk. Frequently epidemics have occurred which were confined to users of milk from a certain dairy. Upon investigation it was found that a case of typhoid had occurred on the farm where the milk came from, that the germs had washed into the well, and that this water was used to wash the milk cans. Once in the milk, the bac- teria multiplied rapidly, so that the milkman gave out cultures of. 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 Hunter, George W. (George William), 1873-1948. New York : American Book Company
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Keywords: ., boo, bookpublishernewyorkamericanbookcompany, booksubjectbiology
