Change of Incidence of Small-Pox. 



109 



III- — Tables givins: ratio of death rate at different ages to the death rate at all 

 ages in different sets of years. 



MALES. 

 -5 5- 10- 15- 20- 25- 35- 45. 55-65-75 



FEMALES. 



FEMALES. 



IV. — Comparative incidence of small-pox at different ages on the two sexes. 

 ■5 5- 10- 15- 20- 25- 35- 45. 55-65-75 



