136 BQ ibiat Me Bee we T. 
The fame obfervations will apply to the ftate of Penn- 
fylvania. This ftate contains twenty-one counties: —The 
capital contains the higheft proportion of females to males; 
the nine oldeft counties—comprehending the moft popu- 
Jous part of the flate, and excluding the capital—have a 
lower proportion of females; the eight counties next fet- 
tled, in point of time, give one full ae and the four 
counties, laft fettled, give the loweft proportion of all. 
This order is direQly inverted, with refpe& to the ra- 
tio of perfons, under fixteen years of age, to the intire 
number of all ages, in thofe feveral feGtions of this flate; 
the four tranfmontane counties containing the higheit pro- 
portion of males under fixteen, and the city of Philadel- 
phia having the loweft. 
The courfe of the migration of our inhabitants, is from 
the long-fettled and moft populous parts of the country, 
towards the extenfive tracts of yet unimproved lands in the 
new ftates, and onthe frontiers of moft of the older ones. 
This is, evidently, the principal courfe of the various pro- 
portions in the number of males to females—and of per- 
tons under fixteen years of age, to the intire number of 
a}l ages,—which are found in different parts of the union: 
And the operation of this caufe is, alfo, plainly difcerni- 
ble in Pennfylvania; the progrefs and actual flate of its 
population, correfponding with the principle. 
Other caufes undoubtedly concur, in producing thofe 
inequalities of ratio in different fituations, which have 
been noticed; but thefe, it is not neceflary to inveftigate, 
It may not be improper to obferve, tn. this p! ace ‘that, 
in calculating the ratio of annual deaths to the living, for 
the city of Philadelphia, the eftimate of . dying annu- 
ally was made, on the prefumption of this city containing 
41,580 white inhabitants. The cenfus makes the number 
only 40,442;—at which rate, the annual deaths would 
amount to one out of every 43-%%. of the living. But, 
as 
