fubftra& it from the number of Perfons of 40 years, 
which is 44J, and the difference is 68 : Which fhevvs 
that the Perfons dying in that 7 years are 68 , and 
that it is 377 to 68 or ^\ to i, that a Man of 40 does 
live 7 Years. And the like for any other number of 
Tears. 
Vfe fir. Dut if it be enquired at what number of 
■Tears, it is an even Lay that a Perfon of any Age (hall 
die, this Table readily performs it : For if the number 
of Perfons living of the Age propofed be halfed, it will 
be found by the Table at what Year the faid number is 
reduced to half by Mortality ; and that is the Age, to 
which it is an even Wager, that a Perfon of the Age 
propofed fhall arrive before he die. As for Inftance ; 
A Perfon of 30 Years of Age is propofed, the number 
of that Age is 53 1, the half thereof is 265, which num- 
ber I find to be between 57 and 58 Years; to that a Man 
of 30 may reafonably exped: to live between 27 and 
28 Years. 
Vfe IV. By what has been faid, the Price of Infu- 
ranee upon Lives ought to be regulated) and the diffe- 
rence is difcovered betw een the price of entering the 
Life of a Man of 20 and 50, for Example: it being 
100 to 1 that a Man of 20 dies not in a year, and but 
38 to 1 for a Man of 50 Years of Age. 
Vfe V. On this depends the Valuation of Annuities 
-upon Lives ; for it is plain that the Purchafer ought to 
pay for only fuch a part of the value of the Annuity , as 
he has Chances that he rs living; and this ought to be 
computed yearly, and the Sum of all thofe yearly Va- 
lues being added together, will amount to the value of 
the Annuity for the Life of the Perfon propofed. Now 
theprefent value of Money payable after a term of years, 
at any given rate of Intereft, either may be had from 
Tables already computed ; or almofl as compendioufly, 
