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THOMPSON YATES LABORATORIES REPORT 
consist of large warehouses and stores erected at considerable expense. Mission 
stations also generally present similar undesirable conditions. 
In the larger towns, such as Old Calabar, the difficulties become almost 
unsurmountable. Removal of European business premises is entirely out of the 
question, but the exigencies of trade and administrative work would permit of the 
occupation of healthier sites during the evening and night, as has been suggested by 
the medical and public works officers of that town. 
But in all such cases which are difficult to deal with, .probably a great deal 
might be done to remove the natives from their present positions near factories. 
We do not suggest as feasible a total destruction of such native huts at once, but we 
see no objection why such control over the neighbouring land should not be gradually 
acquired, so as to bring about the removal of these native huts, and thus remove a 
dangerous menace to health. These native huts are of but little worth, and are easy 
to construct in a very short time. It will become a subject for government policy 
to enable Europeans to proceed in this direction, involving, perhaps, slight compen- 
sation to the natives affected, and it is trusted that, after consideration of all the 
advantages and the economy which would accrue upon the prevention of malarial 
fever among a community of Europeans, both engaged in their employ and in trade, 
the government will in the near future adopt such a policy as will help and render 
easy the adoption of the principle of segregation. 
II. The Surface Drainage of Areas round European Quarters 
It has already been pointed out that one way in which infected Anopheles may 
filter through from native childrens' quarters to Europeans at a distance of even half- 
a-mile from them is by means of the quarters of native servants lodged at different 
points in the intermediate space. 
Yet another way is by means of such collections of water as might serve for 
breeding places. It is easy to perceive that a number of infected Anopheles from 
childrens' quarters in search of water on which to lay their eggs, might have to choose 
a collection near to European quarters and from it fly to the nearest European 
habitation. 
Complete drainage of the surface and the destruction of all such collections of 
water as might serve as breeding-places for Anopheles must then necessarily accompany 
the adoption of the measure of ' segregation,' if the community is to continue com- 
pletely protected from malarial fever attacks, and it is our opinion that such a 
combination of the practice of segregation and efficient surface drainage would be 
followed by complete freedom from the disease among Europeans. The details of 
the various conditions under which Anopheles have been observed to breed in Nigeria 
