Education in health . arge cities in the United Statesfor the period from 1911 to 1918, except 1916. Average City 1918 1917 1911-15 Chicago Boston Philadelphia New York Cleveland St. Louis Pittsburgh Detroit Baltimore (1) Construct a line graph for 1917 and one for 1918 onthe same sheet, showing the comparative death rates ofthese nine cities. Do the graphs intersect at any point? Atwhich point are they farthest apart? What does this mean? (2) Find the % of death rate reductio
Education in health . arge cities in the United Statesfor the period from 1911 to 1918, except 1916. Average City 1918 1917 1911-15 Chicago Boston Philadelphia New York Cleveland St. Louis Pittsburgh Detroit Baltimore (1) Construct a line graph for 1917 and one for 1918 onthe same sheet, showing the comparative death rates ofthese nine cities. Do the graphs intersect at any point? Atwhich point are they farthest apart? What does this mean? (2) Find the % of death rate reduction for each city from1911 to 1918. (3) Which city shows the highest % of reduction? Whichthe lowest? The line graphs referred to in the first problem belowthe table are here represented to indicate how statis-tical material about health or disease may be used toshow progress in a striking manner. *Taken from Arithmetical Essentials, Book III, Drushel-Noonan-Withers, bycourtesy of the publishers. 188 EDUCATION IN HEALTH. Typical health questions growing out of the abovearithmetical matter: (1) What are probable causes forthe reduction of the death rate in the above table?(2) How can boys and girls have a part in reducingthe number of typhoid cases in their community? B. Malaria. 1. Malaria is a disease which is carried from one personto another by a certain type of mosquito. A person can-not have malaria unless bitten by this mosquito. Ague,chills, and intermittent fever are simply other names formalaria. 2. It is the opinion of the National Conservation Com-mission that 80% of the malaria of this country can beprevented. ARITHMETICS AID LN HEALTH EDUCATION 189 3. L. O. Howard, entomologist for the United StatesGovernment, estimates that there are yearly in this country1,500,000 cases of malaria and 15,000 deaths. How manyunnecessary cases and deaths yearly? What can schoolchildren do to reduce the number of cases? 4. The annual economic loss in the United States dueto malaria is
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