CROWDING AND INCREASED DEATH-RATE 



143 



gardless of improvements in sanitation and in medicine, the ex- 

 ponent does not vary, but only the multiplying constant. Therefore 

 m represents the law, while c represents rather the coefficient of 



TABLE IV^ 



No. of 

 Districts 



Persons per 

 Sq. Mi. 



Corrected 



Death- 



Rate 



Same Fitted 

 by Farr 



Life-Table 



Deatii- 



Rate 



Same Fitted 

 by Least 

 Squares 



A. Showing Figures Relating to Density and Death-Rate, 1861-70 



53 



345 



137 



47 



9 



1 



I 



B. The Same for 1891-1900 



27 

 112 

 121 



92 



53 

 56 



31 



40 



31 

 21 

 18 



13 

 6 



5 

 5 

 4 



XX 



17.18 

 18.12 



18.33 



19.02 



19.90 

 20.13 



21 . 12 

 22.31 

 22.99 

 23.72 

 25-31 

 25 56 

 25.10 

 24. 21 

 26.68 

 32.58 



E9o = 2.03 

 A= .63 



H From Brownlee, Journal oj Hygiene, XV, 16. 



§ E%=mean experimental error; A ='V of the mean of the squares of the errors. 

 **i? = i2.4oZ)-""s tt^ = i3-57£'-"'" tti? = io.83£>.">«'» 



sanitary and general conditions of health. The coefficient c decreased 

 from 12.42 in the earlier period to 10.83 for the later. In other words, 

 in the same general area, conditions of living have so improved in 



