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13
POPULATION.
The tables give the population estimated according to the
methods indicated.
The Registrar-General's estimate, it will be observed, is of a
smaller population than that yielded by my own. The method to
which his available data limit him is one most liable to error in a
district such as Willesden, subject as it is to such wide fluctuations
in its rate of increase as are reflected in the varying local activities
of the building trade. In the third and fourth quarterly estimates
I introduced a new method of estimating the population, which, I
venture to think, will be found an improvement in accuracy on
older methods. It consists in an actual enumeration of the houses
in (he district occupied and unoccupied, and from the known
number of occupied houses in each ward estimating the population
on the assumption that the number of persons per house has
remained constant in each ward with that found at the census.
It will be observed that in the fourth quarterly estimate—which
I reproduce—there is but little difference in the result from that
yielded by the older method.

The total of 840 marriages for the year gives a mairiage rate
of 12.4 per 1,000 persons living.