( 134) 
Poffcript toMr. Barron’s * Letter, to Dr. Rir- 
TENHOUSE, of the 17th of March, 1791. 
Read Dee. INCE the date of my letter, on the fubje& 
alana of population and the probabilities of the 
duration of human life, in this country, an actual enu- 
meration has been made, of the inhabitants of the United 
States ; and the returns of the cenfus have been tranfmit- 
ted to the fecretary of ftate, from all the diftricts in the 
union, excepting the ftate of 7 South-Carolina, 
I beg leave, therefore, to fubjoin four tables, deduced 
from thofe returns; inafmuch as they may ferve to eftablith 
fome of the pofitions, which were advanced in the letter 
referred to, and to verify the obfervations refulting from 
the facts therein ftated. 
The table, N°. 1, gives the ratio of free white males, 
under fixteen years of age, to the intire number of free 
white males, in each ftate, refpectively : And N*. 2 gives 
proportions, of the like kind, for four feveral feGiions of 
the ftate of Pennfylvania. 
‘Ene 
* The reader is requefted to correct, in that letter (fee page 25), the following errors, 
which were overlooked until after the paper was printed----viz. page 27, line 6th from the bot- 
tom}; for on read ou.---Same page, line 4th, from the bottom, for A/ft. royal read fciences—vead 
bift. royal acad.fciences.—Same page, line 3d from the bottom; for predabilities—read probabili~ 
tése—Page 30, laft line; erafe the words in that flate-—Page 31, line 3d, from the bottom ; 
for Verfailes-—read Verfuilles.—Page 35, lines 24th and 25th from the top; read the propor- 
tion of free white males, under 16 years of age, to the whole numberof free white males, of alt 
ages, in Maffachufetts, &c. Same page, line 4th, from the bottom ; for 1783—read 1683, 
Page 37, line 20th, from the top; for 1536—read 1535.---Page 35, line 14th, from the bot- 
tom; for country, Virg. read county Virginia.---Page 47, line 19th, from the top; for 925 whom 
---read 925 of whom.---Page 59, lines 7th and gth, from the bettom; thelettcrs (j) and (é), 
referring to notes, fhould be tranfpofed, in order to defignate the notes to which they pro- 
perly refer :--And the note marked (/), (page 61, laft line, and ending with the word ‘in. 
habitants,”’) fhould be placed at the conclufion of the whole; the table, at the top of page 
62, being 2 continuation of the note marked (4). 
+ Since this paper was read in the fociety, the cenfus for South-Carolina has been compleat- 
ed, and the refult publifhed by authority. Such alterations have therefore been made, in the 
fubfequent part of the obfervations, as to accommodate them to that circumitance, 
