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9
From Tables VII. and VIII. it appears that the birth-rate
of the Mayfair Sub-District was 11.26, as against 10.87 in
1893; while that of the Belgravia Sub-District was 22.02,
as against 22.27 in 1893, and that the corrected death-rate
of the Mayfair Sub-District was 10.53, as against 10.74 in
1893, and that of the Belgravia Sub-District was 15'16,
as against 17.32 in 1893. 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 92.15
Belgravia 45.70
Whole Parish 66.19
The calculated mean length of life in this Parish during
the last 20 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 „
„ 1882 „ 52.56 „
„ 1883 „ 55.09 ,,