PROBLEM 242 



260 



farm compare with those in a city? How can the unsanitary 

 environment of the farm be made sanitary? 



Conclusion. — 1. What steps should a large city take to obtain 

 and protect its water supply? 



2. What should be done with the sewage in the city in which 

 you live? Why? 



3. What other hygienic steps should a city take to protect its 

 citizens ? 



Problem 241 : Is typhoid a city or a country disease ? 



Observation. — Make a graph from the following table 1 to show 

 the relative death rate from typhoid in states having a large 

 urban population, and in states having a large rural population. 



Average Per 



Cent op Rural 



Population 



Average Typhoid 



Fever Death 



Rate per 



100,000 



Five states in which the city population 



was more than 60 % of the total . . 

 Six states in which the city population 



was between 40 % and 60 % . . . . 

 Seven states in which the city population 



was between 30 % and 40 % . . . . 

 Eight states in which the city population 



was between 20 % and 30 % • • • • 

 Twelve states in which the city population 



was between 10 % and 20 % . . . . 

 Twelve states or territories in which the 



city population was less than 10 % . . 



30 

 49 

 67 

 75 



87 

 95 



25 

 42 

 38 

 46 

 62 

 67 



Conclusion. — Is typhoid a city or a country disease ? Why 

 is it so ? Look up diagram in your textbook. 



Problem 242 : What is the annual cost to New York city of 

 some preventable diseases ? 



Materials. — Report of board of health. 



Method. — Using the board of health tables for the year 1910, 

 find the number of persons who die from each of the given prevent- 

 able diseases. Which are particularly children's diseases ? Fol- 

 lowing these directions, compute the annual cost in lives. 



1 Modified from Allen's Civics and Health. 



