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There was no noteworthy cause of sickness or invalidity
during the year except the rather high incidence of scarlet fever in
the latter part of the year. In the earlier months influenza was
prevalent and exacted its toll, as did measles in those of younger
ages. The incidence of diphtheria remained low throughout the
year.
Population.
The mid-year estimate of population for the year 1933 was
119,930 and for 1934 132,049. The increase is partly due to the
natural increase of population (i.e. the excess of births over deaths,
this figure being 919 in 1933 and 1,091 in 1934) and partly to the
occupation of the new houses erected (3,636 in 1933 and 4,331 in
1934).
The number of inhabited houses at the mid-year was 35,805,
the average number of persons per house being therefore 3.68,
a figure lower than that previously recorded for the three constituent
districts. Applying the same figure to the number of
houses occupied at the end of the year gives a population figure of
139,480.
Birth Rate.
2,167 births were registered during the year, the birth rate per
thousand population being therefore 16.4, compared with the
figure of 14.8 for England and Wales. This relatively high figure
is to be accounted for, as is the low death rate referred to in the
next paragraph, by the relative weighting of a young adult population.
During the years 1930-33 the birth rate figures ranged in
the Hendon Rural District from 13.74 to 18.08, in Wealdstone
from 16.30 to 21.2, and in Harrow-on-the-Hill from 12.4 to 18.3.