DURATION or HUMAN LIFE. 35 
ed, are, to the number of fouls in thofe places, refpects 
ively, as follow, viz. 
In France i birth to 26 inhabitants 
England—-1 do.- for262.. .).do. 
Paris-- I do.- to 30 do. 
London—--1 do. 0} 228-4), 0. 
Yet, even in the city of Philadelphia, the annual births 
amount to one in twenty-two and an half, of all the inha- 
bitants. A bare infpeCtion of the feveral proportions, in 
this particular, willenable one to form a judgment of 
the increafe of population in this country, beyond that of 
the two moft confiderable in Europe. 
Another circumftance, from which the ‘extraordinary 
progrefs of population, in this country, may be inferred, 
is the high proportion of thofe under the age of 16 years, 
to thofe above that age, out of the whole number of the 
living.—Dr. Halley computes the number of the living, 
under 16, to be but a third of all the living at all ages. 
But it appears from the cenfus of the inhabitants of New- 
Jerfey, taken by order of the government at two periods, 
viz. 1738 and 1745, that, in the year 1738, the number 
of thofe wnder 16, was to the whole amount, as 47,°%3, 
to 100; and, in 1745, the proportion was, as 49,55, to 
100. The proportion of free white males, to the whole 
number of perfons of that defcription, in Maflachufetts, 
taken from.the recent cenfus of inhabitants in that ftate, 
is as 48.2. to 1co.—Hence we find nearly * one-half, in- 
fiead of one-third, is the proportion, here, of thofe un- 
der 16, out of the total number of our inhabitants.—The 
proportion for the city and fuburbs off Philadelphia, is, 
E.2 by 
* Mr. Jefferfon obferves—in his notes on Virginia—that, to find the number of free inha- 
bitants in that flate, it is to be noted---that thofe above and thofe below-16 years of age, are 
nearly equal. 
+ The celebrated founder of Pennfylvania, in a letter to his friends in London (dated at 
Philadelphia, the 16th of Auguft, 1783)---acquaints them, that the planted parts ofthe pro- 
vince were then erected into fix counties, containing about four thoufand fouls; and that the 
«apitol had advanced, within lefs than a year, to about four fcore houfes and cottages, fuch as 
they -were,—<Philadelphia now contains about 44,0Co inhabitants! 
