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6
If therefore we can calcalate the gain in lives, that gain
multiplied by the monetary value per head will represent the
total minimum economic saving in terms of currency.
In the third column of Table No. 2 is given the standard
death rate for Willesden, which I calculated from the census
data of 1901. It represents the death rate in Willesden, if
each sex at each quinquennial age period died at the same rate
as persons of the same age and sex died in England and
Wales, during the preceding decennium.
The difference between this standard rate and the actual
death rate for the District represents the gain or loss due to
favourable or adverse local conditions.
In column No. 5 of Table 2 is shown the reduction in
the death rate on this comparison, and in column No. 6 the
number of lives saved each year in Willesden on the
assumption that, but for the favourable local conditions,
the people in Willesden would at each age period have died
at the same rate as in England and Wales. The total saving
during the seven years, on this assumption, amounts to
3,596 lives, representing at their minimum value the sum
of ^571.764. Another comparison, more useful perhaps in
assessing the value of the particular efforts of the past seven
years, is the change in the death rate during this period as
compared with that of the preceding seven years.
The mean annual death rate for the seven years ending
1901 was 14.4 per 1000, and in columr 10 is given the actual
lives saved as a result of the reduced mortality in Willesden
during the last septennium.