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9
From Tables VII. and VIII. it appears that the birth-rate
of the Mayfair Sub-District was 10.87, as against 11.32 in
1892 and 8.95 in 1891; while that of the Belgravia Sub-
District was 22.27, as against 22.71 in 1892, and that the
corrected death-rate of the Mayfair Sub-District was 10.74,
as against 11.62 in 1892, and that of the Belgravia SubDistrict
was 17.32, as against 19.25 in 1892. It must, however,
be remembered that these rates are calculated on too
small a population.
From the birth and death rates in Table VIII., 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 97.96
Belgravia 52.03
Whole Parish. 59.58
The calculated mean length of life in this Parish during
the last 19 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 „