d and
maturity, which will diminish the above figures in different
proportions, because the conditions of town life are more fatal to
children than those of the country. No life tables exist for
Coventry and Warwickshire; I am therefore obliged to use statistics
for similarly conditioned localities, to determine the amount of the
allowance that should be made. The life tables of Manchester [26]
will afford the data for towns, and those of the "Healthy Districts"
[27] will suffice for the country. By applying these, we could
calculate the number of the children of ages specified in the census
returns who would attain maturity. I regret extremely that when I
had the copies taken, I did not give instructions to have the ages
of all the children inserted; but I did not, and it is too late now
to remedy the omission. I am therefore obliged to make a very rough,
but not unfair, estimate. The average age of the children was about
3 years, and 25 years may be taken as representing the age of
maturity. Now it will be found that 74 per cent. of children in
Manchester, of the age of 3, reach the age of 25, while 86 per cent.
of children do so in the "Healthy Districts." Therefore, if my rough
method be accepted as approximately fair, the number of adults who
will be derived from the children of the 1000 factory families
should be reckoned at (2681 x 74/100) = 1986, and those from the
1000 agricultural at (2911 x 86/100) = 2503.

[Footnote 26: "Seventh Annual Report of Registrar-General."]

[Footnote 27: Healthy Districts Life Table, by Dr. Farr. _Phil
Trans. Royal Society_, 1859.]

(C) The comparison we seek is between the total families produced by
an equal number of urban and rural women who had survived the age of
24. Many of these women will not marry at all; I postpone that
consideration to the next paragraph. Many of the rest will die
before they reach the age of 40, and more of them will die in the
town than in the country. It appears from data furnished by the
above-mentioned tables, that if 100 women of the age of 24 had
annually been added to a population, the number of those so added,
living between the ages of 24 and 40 (an interval of seventeen years)
would be 1539 under the conditions of life in Manchester, and 1585
under those of the healthy districts. Therefore the small factors to
be applied respectively to the two cases, on account of this
correction, are 1539/(17 x 100) and 1585/(17 x 100).

(D) I have