358
calculating the population for the year. It is evident how-
ever from the great activity of the building trade during
the past year, that many of these people intend to take up
permanent residence in Hong Kong, for sufficient new houses
for about six thousand persons have been completed during
the year, practically every unoccupied house or flat has
been taken and most of the native dwellings have become con-
siderably overcrowded. The building operations themselves
also contribute to the spread of Malaria by the aggregation
of infected workmen on building sites which adjoin untrained
nullahs, as explained in my report for 1911.
Special classes are held in all the Schools of the
Colony for instructions in Hygiene, which includes a des-
cription of the part played by mosquitoes in the transmission
of Malaria, and mosquito larvae, in jars covered with mos-
quito netting, as regularly supplied to all Schools for de-
monstration purpo986,
A considerable quantity of literature on this sub-
ject both in English and Chinese is also distributed
yearly to the community .
Francis Clark
March 29th. 1913.
MD WRCP OP H
Medical Officer of Health.