[ ] 
fcquently many of the People, whofe TrafRek brings 
them to ‘Dortj may die there, it is fuppofed, that 
about 680 Children are born annually there, and that 
confcquently this City may contain 24000 Souls. 
Next to this, the Author gives an Account of 
Haerlem , how many People died there in 84 Years, 
from 1656 to 1739 inelufive, namely, 132132 Per- 
fons, which is annually, on an Average, 1573. 
The next is, how many Marriages from Anno 1690 
to 1739 inelufive, namely, 2 1910, is annually 438, 
on an Average. About the Births, Mr. Kerffe - 
boom refers to his Firft Treatife, Page 54. where he 
fuppofes, that 1450 Children may be born alive an- 
nually ; and endeavours to demonftrate it further, by 
giving an Account of the Births for 60 Years, name- 
ly, from 1680 to 1739, and finds it to be 1453 j 
from which it is calculated, that this City contains 
50500 Souls, as mentioned in his Firft Treatife. 
The next Account is that of the Burials of ^D'etft 
and c DelftJhaven , from the Year 1724 to 1739, being 
1 5 Years, and is found to be annually, on an Ave- 
rage, 723 Perfons; but there is fubjoined, for the 
greater Certainty, an Account from the Year 1696 
to 1739, which proves it to be 748 Perfons an- 
nually. 
The Marriages are in the fame Time of 44 Years, 
on an Average, 224 per Annum , which fhould pro- 
duce 728 Children, according to the Rule laid down 
before, namely, 100 Marriages producing 325 Chil- 
dren; but is found to produce from 1690 to 1739 
inelufive, to be 648 per Annum , on an Average 5 
from whence it is fuppofed thgfe Two Places con- 
tain 25000 Souls,— 
Sf 2 
The 
