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managing of them, that many are deftroyed, with 
fleepy and poifonous cordials, and others loft thro’ 
the vvant of care and tendernefs, or vvickednefs of 
our parifh-nurfes j for 1 know that there is not one 
in five furvives their management. 
And thus, from all thefe confiderations, I think it 
may be allowed, until it is otherwife demonftrated, 
by bills formed in a different manner from what we 
have at prefent, that the probabilities of life are much 
the fame at London as at Breflau, at the age of 20 
or after 14. And if w^e take this for granted, we 
fhall from thence be able to form a ufeful table, for 
thofe within our bills, by accommodating and join- 
ing the bills of both places together. And we may 
alfo nearly determine the number of infants born 
here, w'hich hitherto has not been confidered. 
To find the number of births, by which I mean all 
thofe that are born alive, fo as they might have been 
baptized, we muft have the number of burials known, 
at leaft in the feveral periods, till the 20th year^ vi-z. 
under 2, between 2 and 5, between f and 10, and 
between 10 and 20. And it is evident, if we fup- 
pofe no acceftion of ftrangers, that the number of 
living in any one year will be equal to the difference 
between the births, and the fum of all the fubfe- 
quent burials at each age till that year. The num- 
ber of the living in any one year is eafily known, if 
we fuppofe the probability of life to be the fame as 
at Breflau ; for then the number of dead there will 
be to the number of living, as the dead at London 
to the living. Thus in the 20th year the dead and 
living at Breflau are as 6 and 5-98, and the dead at 
l.ondon are 73, or more exadly 72, 88 ^ therefore 
2 . the 
