378 SCIENCE OF HOME AND COMMUNITY 



Dkections. i. Starting with the third year of the first table 

 put a dot opposite the death rate for that year in the column on 

 this page with the figure 3 at the top. To show how this is done 

 the first two years have been filled out. Do the same for the 

 remaining seven years. Connect adjoining dots with straight 

 lines. 



2. Begin with the third year of the second table and in the 

 same way complete the other eight years and connect the dots 

 as above. 



Figures at the left represent the death rate, those at the top, 

 years. 



ist year 2d 3rd 4th 5th 6th 7th 8th Qth loth 



3. Reckoning the population of New Jersey as two million, 

 how many lives have been saved during the last ten years in 

 the state of New Jersey through the antitoxin treatment? 

 To do this, first find the average death rate for the ten years 

 before the treatment and then for the ten years after. Sub- 

 tract these. The difference is the number of lives saved annu- 

 ally for each ten thousand population. From this work out 

 the total number saved in New Jersey during ten years. 



Hydrophobia. The treatment of hydrophobia is another 

 application of the discoveries of modern science. After a 



