be added together. If you think the matter, under the 
uncertainties I have mentioned , to deferve it, I (hall 
fliortly give you fuch a Table of Logarithms as I fpeak 
of, and an Example or two of the ufe thereof : But by 
Vulgar Arithmetick the labour of thefe Numbers were 
immenfc ; and nothing will more recommend the ufe- 
ful Invention of Logarithms to all Lovers of Numbers, 
than the advantage of Difpatch in this and fuch like 
Computations. 
Befides the ufes mentioned in my former, it may per- 
haps not be an unacceptable thing to infer from the fame 
Tables, how unjuftly we repine at the fnortnefi of our 
Lives, and think our felves wronged if we attain not 
Old Age whereas it appears hereby, that the one half 
of thote that are born are dead in Seventeen years time, 
1x38 being in that time reduced to 616. So that inftead 
of murmuring at what we call an untimely Death, we 
ought with Patience and unconcern to fubmit to that 
Piftolutioa which is the neceflary Condition of our pe- 
riftiable Materials, and of our nice and frail Structure 
and Compofition : And to account it as a Bieffing that 
we have furvived, perhaps by many Years, that Period 
of Life, whereat the one half of the whole Race of 
Mankind does not arrive. 
A fecond Obfervation I make upon the (aid Table, is 
that the Growth and Encreafe of Mankind is not fo much 
(tinted by any thing in the Nature of the Species, as it 
is from the cautious difficulty moft People make to ad- 
venture on the ftate of Marriage, from rhe profped: of 
the Trouble and Charge of providing for a Family. Nor 
are the poorer fort of People herein to be blamed, fince 
their difficulty of (ubfifting is occafion'd by the unequal 
Diftribution of Pofleffions, all being necefTarily fed from 
the Earth, of which yet fo few are Matters. So that be- 
fides themfelves and Families, they are yet to work for 
thofe who own the Ground that feeds them : And of 
fuch 
