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10
From Tables IV. and IVa it appears that the birth-rate
of the Mayfair Sub-District was 11.32, as against 8.95 in
1891, and 9.95 in 1890; while that of the Belgravia SubDistrict
was 22 71, as against 22.59 in 1891, and that the
corrected death-rate of the Mayfair Sub-District was
11.62, as against 10.08 in 1891, and that of the Belgravia
Sub-District was 19.25, as against 17.00 in 1891. It must,
however, be remembered that these rates are calculated
on too small a population.
From the birth and death rates in Table IVa I have calculated,
as usual, "the mean length of life." I use the
term "mean length of life" instead of "mean duration of
life" (as I explained in my Annual Report for 1890) in
order to prevent confusion, as the term "mean duration of
life" is a technical expression, which means the length of
life as calculated by the life-table method. The "mean
length of life" stated in this report is calculated by means
of Dr. Bristowe's formula.
Mean Length of Life.
Mayfair Sub-District 87.38
Belgravia 47.86
Whole Parish 55.27
The calculated mean length of life in this Parish during
the last 18 years has been as follows:—
In 1875 it was 46.67 years.
„ 1876 „ 47.96 „
„ 1877 „ 49.52 „
„ 1878 „ 48.03 „
„ 1879 „ 48.55 „
„ 1880 „ 58.01 ,,
„ 1881 „ 50.26 „