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11
From Table IV it appears that the birth-rate (corrected
for 52 weeks) of the Mayfair Sub-district was only 9.95, as
against 11.83 in 1889, while that of the Belgravia Subdistrict
was 21.34, as against 22.14 in 1889; and that the
corrected death-rate of the Mayfair Sub-district was only
9.32, as against 12.09 in 1889, and that of the Belgravia
Sub-district 17.24, as against 15.27 in 1889 and 17.38 in
1888, the death-rate of the Mayfair Sub-district being, as
shewn in Table IVa, the lowest yet recorded, while the
death-rate of the Belgravia Sub-district was lower than in
any year since 1879, with the exception of the years 1883
and 1889.
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 last Annual Report) 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 104.15
Belgravia 52.35
Whole Parish - 62.67
The extraordinary figure calculated for the Mayfair Subdistrict
is due to the abnormally low birth-rate (9.95) and
this is caused partly by the fact that there are a very
large number of unmarried domestic servants, and partly
because so many of the children of the inhabitants are born
in the country.
The calculated mean length of life in this Parish during
the last 16 years has been as follows:—