122 



PHILOSOPHICAL TRANSACTIONS. 



[anno 1781. 



which prevents their taking the necessary care of, or even affording sufficient 

 clothing and nourishment to, their offspring. 



I shall now from these tables attempt to collect what the chance of life is at 

 different periods, from infancy to 26 years of age; but, that I may be under- 

 stood, it will be necessary to premise some account of the method I have fol- 

 lowed. I have supposed each of the women to bear a child every 2 years; this, 

 from the account of those who returned to the Dispensary a 2d, 3d, or 4th time, 

 appearing to be the mean term. On this principle, when I find that a woman 

 applied at the Dispensary who had had 1 child before, I conclude, that that 

 child would be 2 years old, if living; but if the woman had borne 2 children, 

 I suppose that the first would be 4, the second 2 years old, and so on. And 

 finding, that of 299 children born by as many women, who were now advanced 

 in their 2d pregnancy, 17 1, or -^ only were living, I conclude, that on an ave- 

 rage 5 out of 12 die under 2 years of age: and observing that of 508 children 

 born by 254 women, who were now advanced in their 3d pregnancy, 259 only 

 were living, I first deduct 210, which is T V of the whole number, who died 

 under 2 years of age; and then find that 39, which is nearly -^ of the whole 

 number, or 4- of the survivors, died between 2 and 4 years of age. 



Table of the Chance of Life from Infancy to 26 Years of Age. 



Age. 



Persons 



living. 



Decrease 

 of life. 



5 in 12 



6 in 12, or 1 in 7 of the survivors 

 8 in 15, or 1 in 1 5 of the survivors 

 4 in 7, or 1 in 12j of the survivors 



6 in 10, or 1 in 15 of the survivors 



7 in 10, or 1 in 4 of the survivors 



5400 2250 



2 3150 450 



4 2700 1 80 



6 2520 204 



8 2313 156 



18 2160 540 



26 1620 



3780 or -*3 would die. 



1620 or -jL would be living at the end of 26" years. 



5400 



A comparative table of the population of London, with a view to show the 

 proportion of natives to persons born in the different counties of England and 

 Wales, in Scotland, Ireland, or foreign countries. 



Of 3236 married persons, 824, or ■{-, were born in London; 1870, or 4-, in 

 the different counties of England and Wales; 209, or 1 in 15, in Scotland; 280, 

 or 1 in 11, in Ireland; 53, or 1 in 60, were foreigners. 



Of the above number the males and females were in the following pro- 

 portions. 



