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37
sequently upon this calculation the 14 deaths in excess
of' that average exactly corresponds with the excess observable
as the result of the three diseases of the zymotic
group referred to above.
But there is reason to believe the increase of population,
by immigration especially, has been within the last few
years such as to warrant a totally different correction of
the average to that usually adopted, and one that would
give to this sub-district a by no means unsatisfactory
sanitary position amongst surrounding parishes.
Upon an estimate founded upon both the natural inmcrease
of population, as shewn by the excess of births over
deaths, and the assumed increase by immigration, as shown
by the number of new houses erected and inhabited since
the census of 1861, the number of inhabitants cannot now
amount to less than 7,000. The number of births since
the census of 1861 being 373, and the deaths 256, it
follows that the natural increase of the population is
137. The number of new houses erected in the same
period is 108. Calculating, therefore, only 5 persons
to each house, and that but 80 of these houses are
as yet inhabited, it may be fairly taken that the influx of
new residents has been, at the very least, 400. These
two sources of increase give a somewhat larger number
than is required to bring the population of 1861, which
was 6,481, up to 7,000 in 1863. The deaths being 129, it
follows that the rate of mortality is 18.42 per 1,000
living, or little more than one per 1,000 above the favourable
standard of the Registrar-General distinguishing the
most healthy of the rural districts.
progress of mortality.
Introducing a similar table to that employed in my last