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9
From Tables VII. and VIII. it appears that the birth-rate
of the Mayfair Sub-District was 11.39, as against 1126 in
1894, while that of the Belgravia Sub-District was 21.50,
as against 22.02 in 1894 and that the corrected death-rate
of the Mayfair Sub-District was 10.16, as against 10.53 in
1894 and that of the Belgravia Sub-District was 16.94, as
against 15.16 in 1894. 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 93.59
Belgravia 52.39
Whole Parish 59.96
Table IX.
Mean Length of Life.
Year.
St. George's
Hanover Square.
London.
1875
4,6.67
—
1876
47.96
—
1877
49.52
—
1878
48.03
34.24
1879
48.55
34.23